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 0x9f3668403ed902f774c3eaafd25ab1d8ffa85f44fcaf721ee0ac81ecceb62253. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/948e3699-5c47-4928-bc7b-f28b6bd6812e.json and https://artists.proofprofile.net/proofs/artist/948e3699-5c47-4928-bc7b-f28b6bd6812e.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 0x85b7ab4b35e165ba3ac6de27974d1e8f52bf83051a000de92d0f5429affa9b43. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/USHM22465835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bf0bab00e55092d13e2a7fb6db840facb3a1cf96430a7deb0646c91d031cd1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM22465839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f931b82067b368c6eca05d3eaba674b06713e8ac082f91efc2b1ad43d42907. 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/USHM22465840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde05b549acec7c446919df6b24219bc599c83ebe1c308632443a5247de0bf1fe. 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/USHM22465843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaf8f81804dc690ea6f0ef5746700062b80ed872d9d36649cbe2f734c29954d. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USHM22465834.
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 0x2986449efe95575a17f85f255740472e904e36e78ddd5dd52ffbca69da5907cc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM22465838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabd302ba408a3b396198fa976c56957518da0dd459a94dd7cbeba528d1d5258. 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/USDY42402703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f851f1b7a5a5181624f29d244a5503dea15a063d59eb1288593f4f92412605. 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/USDY42402704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff99fc2ea37d0159b542d7c401defb1b47e6c759b919b9ef3e5d9755e42a9ce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDY42402705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01617a3226a77fd132c86638440f50adc42e69a4d4c8b0956b5e658695be7055. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDY42402707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c286e143fe291f74c5be698292a28b94aa1d871610bfa32415cb05ce1939a46. 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/USDY42402711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe88b2a81d2229dee98e54db18ddbbefe7e80f1304415017bb7f9608d1f8e13e. 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/USDY42402715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c775bee69fce06e2c56e33c9e0f88461ffc7f01d28783853519f32a5b646cd7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USDY42402709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed124b05f2001802b5d0d134fdf963588254501a25ee18cd3927b35313a7536. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USDY42402710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5967d1e30b75e04f245216d7bac4236bbb4849d7d289b2909ca830399b98ee0f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDY42402712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f2f99be7b7a0dcc2b11217dc3ee69e6df9f6496ba92ad751f46bce3f6c1d07. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USDY42402714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f42da8f9a2d8cde7ded3ec6f3998a0bbd76182513b67f80a52cb145dea362b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USL4R2406392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf592ef877394bdebf2e2184c359cc360d9504acd9dae14b876bccf96a3221f90. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4R2406396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e009047faa0547d04d2014ec79cfd69bd140b4de29c7f2dc36a1554aee3a83a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USL4R2406398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c51fb92420427aa8ad1a7595b71863ec091f297fdce77f268b86c257bb917c9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USDY42077983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ca923b3a986ac18edf51a76846a92dc491473f4dc96789812908a265a8c05e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USDY42077977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3f7fecf549e0cef359148e88e55ca0711bbfbfc60ab9b05aead0dc917d4c42. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USDY42077980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f171e111147e939027861e8ac68de6dbbe6db507c772d7c0bec0e280869b3e. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USDY42077981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ba1108ba6641398e14eb9591466a3c9a61a7b56e0e190bc482af720c107737. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USDY42077985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5387aea921caab087c90b57cd178288f198ce1c0545c1fc34a645f9c6413bad6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QT3TB2417103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fd0b6914359116f18482fada3a51b0482f52dd3ee66959c8d9eb109d4a4829. 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/USL4R2458552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94165311decfcd951382df270d20b91d1e6f6578b86a645c816b3595b7dbe3e6. 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/USCGJ1907406.
Pbc El Atrevido , Angel & Christian , Travy Joe, Etc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22e727d10a82ed28fc3a1c4140b31ffbe73063a7c435a9e822f609ec9967617. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USHM80978070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04b9e55b2f638ca4f6bacef5711c7f3e7043c5913d181fd6152261f90413b13. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM80978076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc476de0b80ee1c64adbcb329307165e562388e6c07260cef8e4de062da983348. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM80978087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c33a1586c017f8123dd408882a079b9399bdf3b46e6fb31f171384db8abbe76. 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/USHM80978096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c57ea587ec3afc854635f323daf84a96ae3f0f084130160239c34cc93f32e4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM80978100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ea776115b056d1353c1ccbd3e58225c902bc4ce317f041e6719ab33078e378. 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/USCGJ1920716.