1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494ea1566f0a1fdf5f90452e90be4324c464274f5e2aad936bc58aa29a6246f2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b381ade-1d8c-45bf-a1d0-9474f04e55ba.json and https://artists.proofprofile.net/proofs/artist/5b381ade-1d8c-45bf-a1d0-9474f04e55ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5522b8eefdf0fc6fdaec76163a9008787f085269bd1d82ae5ad56693a7ac98fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c417ef002a115652e6eb014db5fafab5c8215d9d757e0f9b88c1691097c100b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3a452e1a2934bbdae3a117efb91963325f5cf357224d16b195484468b750a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc0e040e71144125e77adb92deae3eca4ce9fd83ec3a186d3a7cbc56731ff08. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccdc72e877545bd711309571df939223a40ccf6a4c9bcb9be12960d517c828c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5fc39e5429eab0d4070252bc5bbd6366bd1d8086ace7187c1dcfacf7cb262a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5ee18d976ee5ca5c111452ccd1f34901fa2bfb1a4410e23246a773c4e4a4cb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49269cbb39060687ee39e7e4fb7bb4e02d640e22172b2a22b9f2da16ebc81915. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b31bc9832579861a8aa4b1e81e26647b16553e8fd19c5ef30cf5454547ace3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad08ba314f2ba567adf6deb96c4a015eb988cb1220fe0e7d80a0455e228c5284. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1995d73117449b5873c352c8e3f0a8b6fdfc2c6b3f2aaef90b75b4f96dbffa8d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6cad4b29d90aceb7358bb6c47352c71fe2982ecc00c22b583b8cb6e30cd83c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ae669995ef720ff514f6ec5c41dcab1079866c7f69ba8ff70d4d29ab87dd5c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2597e2f71ec07d5f69c607b871a46638f6fc63f50ca5f26448b5fa177ce468a6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02198ffa30e7373b627f32297d7d7ca649ac3059c21f924fa7dd6fd9c5438b05. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd406559d91b229de0bb6ea874d2db7f1214f446aefe708bde25a36c7c9e4ab4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f9d146e5584ecaee53d58705916e4fd7f6ab61ab178c0681a8ade4bb473bf1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35169cef8e462b403ef4c8b6d23b1ca5fd6a75ff7f7baa4e4b78841a8f679f0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb306839ebfa12ce5a576650cbd471b1c287c3f6b8386ed49338259e553a934. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9559ad5eddd0a0008fad7dde4419bac4c81472412a45e64c27d2ff7713ab895. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf652a2fa91f1d8aaf2fdb3d13c442fac13f2141f2dceefa193052147a9e2160b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5787af15727b190f6b3fbda0f278fd1186b8c67fed82cc41bcb48a07c7e48c4b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1970f0c1b417c6fd1149c74daf6c310f695529aad64d847fa219403df852beef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3f4bb7a685952831f491c355f2de302007d9ea7b4630f6258a075eda565713. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b216b3a15c34f3004b7b69528d6ea5de27c4e970e9c8370210adcac2ca3a2b3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b817161b2592eb50eb36b9f96910f711940bfab07344f473a45c4c4f13bf1d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba6bf257368c88a0b9bc9accc51a4b2b4cf5ccda2cfcca726e8d468952f6024. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9062d7b45d677db26bb1e608d9ce6d3d955d97e005938d86fb461305fadac27. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55938242c7e20a09e1abf95234b3c8506a16df79e6be700ee58e1184f0b2ee44. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d957e953ce93027778a122bcc80f5c5e95d686696f80217f8864a66c7ad431. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070d35c9b6408dd076a09aeea76ac4afed5729fa8aceac6714e1b0e2762c03cd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc58ad7ced8609b7d90cee540f011c812d2d50369f3af5f663b53359a3c0bd05. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5197a0f7391e39978de4a46ed67fb7922dda41108ef2901f2fe33dccb441a9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bdec039123bb69e58363a0dd02c43faa525f7481d7c78f7458a8df6e8e3509. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffc94538ded04ae1bae62997048e0916127a3386376f27356f522168a2e839a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832aacba784ada6a62d1d95671e54ebabfa54ed0b21490763df95c06a0a35d38. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1529f894a9639655f60ba44a8abad9b3c57991b5c0aa06160c3642e6e34dc3d2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055078.
Underground (Lo Que No Se Quiere Ver) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed49f74bf42bf3bbe75ff8b532d809be2f47354a219fc0f928dd9cf9bb398e3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1055080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c559be1c34b244c9a49825b5ba87cc6e6785c6a8cf1e98042122861625fb5e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACI1561192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34967f56a4772f41a30acab63c68d7d8ba789ec8d8305496f1f11ffaa9a8baf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1638723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842318d7b42a4f9f838e7552c64df79c3bf497cf7cd885ef67565764a7acc805. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22325467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f7458f11908dd1d545466e6e223c6b560a59eebf4c984026dde1b089f5c4c3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABS1351209.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda77f454e3750863ee53da91456201533ccd246294cd1adddeb9e97e8f0fa8e2. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22325472.