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 0xd000cd32243140f23634f50fd3e1b9bd19b34094ec1b724bb446b70091bbc1cf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11c05440-fe43-4e93-8266-d343a25d7815.json and https://artists.proofprofile.net/proofs/artist/11c05440-fe43-4e93-8266-d343a25d7815.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 0xd9aa6155b0b95754dfa513d7aa4fae62945d65c1b2673a54fecd11452a7e783b. 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/ES03S1903161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22fe3877c15d920d6a07ecd83a864289c2df8bfc08ec87a3fd3fc38ea291a3a. 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/ES03S1903162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930cc7198eaac303cb2e5d2f01a43102f353a222e7b85df15dda3355ec9554a3. 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/ES03S1903163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf987761710817d80528387489aa2a504ae70215e187da791b9e1f3ef022c253. 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/ES03S1903164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9348706ac11df87cc32a6ac57e1fa8c451d260c6a176a991bf3d6ecc3d69a64. 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/ES03S1903165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf672171d7d9a910be8c7097f3d01c296136ff8f9c94597404efbe11e1602df. 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/ES03S1903166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ab04a79085ea5c30a0bd94a4e25d32032329bde1b91f67897d2c2303efbc78. 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/ES03S1903167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e5f8e67844500223f74a847ccee5fa88b50bcf226eec12ac525b148b41fd45. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES03S1903168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e3cafe924f8b7b12cf0464964396874bada7e3b3f0532762744975aafc251b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES03S1903169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400fe9352c65740f4d9898fd9697ee0441699def3a9767030681fe22f41e67ed. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES03S1903171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63387af9cd7fb0fa371532329f5a758e3164b2c232ee6ba5faed647b4ea0effc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES03S1903173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21a4b9d9fde722390667f58e4d9c82591d6ff8bd0b411800c0262e9a2b0506b. 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/ES03S1903174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c3111cb542ff8aeced4131aa4400fe6972263d6a4a271024037de3bd876b24. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES03S1903170.
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 0xdd65a869aa4e22cd643219d0802720f9a3b62c98912cd8b41df51d7da260a5cf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES03S1903172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f00594099b2307922f8dc87f4dba8f3665a460316681e0d49b76632dd3a152. 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/ES03S1803060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de2691201327708dc6c30da3170191a360d4f30a5a5056ea1f780d57f72d32b. 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/ES03S1803061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1159df9662017de942598b78b4419d6e719b44803e39fd418877eb019433a979. 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/ES03S1803062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425b4f29fee333cd49ea5a5a6915e10303002fe1b75f663bd99d43d9d7660e5f. 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/ES03S1803063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb758ecf1db63f9c035440776a9995359166988bfdaa053e404f1df9f4233ebff. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES03S1803065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb159c95f6fab7932c40eab0f485298526102f655ade09f7501e8d661d0781b0c. 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/ES03S1803066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e08ee64d9d676b7b98fb4d52178501c846b439d6d070db1412e7e144e20225. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES03S1803068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c04c43f2f0969c73051ec9c8a8ae3f1f6e5b5963e27da0f73b69eac73c32ce9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES03S1803070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8845a1eab0d462f5fbc577b3aefd5c52276b48832eca4234f4dcd7c8bc1aed94. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/ES03S1803072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f23e6ffd57f67374dc178e6e5f195a682517e653348f246a05ced0d7fe3b43. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES03S1803073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77be5a879a379fef8745538ade27e5f737a4ce5d74e9fd691bafbac97594cea4. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:52Z), 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/ES03S1803067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24793e5c2fa2e60a97a77c65eaae05266a3253ee48d057b6d8e9e57466ec972b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/ES03S1803064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adb9665f927831d161280f1e05c122f40950fcf6a144680794e58e0d1e137d4. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/ES03S1803069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88b1c016f7b819b0f58faac29c1e14a0d326f309ba88b445c652cdc8e0a7527. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES03S1803071.