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 0x849f6987403a7f0e2b13d73b9409aca6f3f0e52f31ca4654b718b483c7da8fb9. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/863d96d1-a97b-4449-8389-3cf535dec964.json and https://artists.proofprofile.net/proofs/artist/863d96d1-a97b-4449-8389-3cf535dec964.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 0xc6aba79baa356acbadf82473ffed4a294bff54606e1cdf60f604d6a84a4d47ce. 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/TCAHJ2381142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9593f5f48f1f01e10f22666e29567d3a0b0850fcd8aa546a2cc84fb02f5ff3f6. 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/TCAHJ2381145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf052018c64c4164c0ad8e5975182a195636d213aebdccef3eca9976e65d20538. 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/TCAHJ2381152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fa062142eb437e145170cb71233bc2a3daf45200a6bb5141f76b4bdb7f600f. 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/TCAHJ2381162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0a8568130d8b36bc0e4a77194a547eacebd7c3604b37fb08901ab02a4d49bd. 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/TCAHJ2381167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883ec692ac20386e7aa63caa577ed9af5a73826d5c70fa06963806bb2bf00115. 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/TCAHJ2381170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885e5c81590ee472d5b044e4b932db00bb18b32ba1ba87105c4b0b24a043e500. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TCAHJ2381171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d1a25291b6f7e4c95c3bb0f51d2a9e66b91727b27c1ca3619bd9ab0ed2102d. 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/TCAHJ2381176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6588247a53a1c39c8fcf8682726984aefda4c8337e82a7f6254bc658bdce3ad2. 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/TCAHJ2381179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f03337d6cbc2aea37d6034eeb0d92137373f5194d3f4f79816ad54f94fde5d. 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/TCAHJ2381180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad0c7409d321ea5a6e1e0fb0288565f0d45f8b70b20a0194c0e8620910fc775. 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/TCAHJ2381185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a0198d0667c4b8656250d6e85a28ca8727b2fda2472d5f18a99e589df84fe6. 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/TCAHJ2381187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154066d4100f21105317d36aabac8473817778a5808f3a066fcc2e1f065d6a46. 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/INS231658059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac5c7e517b00039a8e50d75d18400ed64c7436c30118e8157cfc67310ab5964. 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/INS231658060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e485ab344853358b40ba85326e45cb1d1d7d6ef33ca5e6956b9646339e7cb2. 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/INS231658061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2510fccc069d7b3348e1ac215e473beba17e01992cd6b196687e394a91ca88. 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/INS231658062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529dcdeb33bbf07546e62a4ebbf181c0090a7beb1d07a81f456b9115fc97ad29. 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/INS231658063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5c22be89c7ed203181c93f9eeda38a179fbebaa53201dcf917a0142c059cb7. 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/INS231658064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f09aa631b416f676af29f083173fca966eb63012d79e6d6241505e58dad2f9f. 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/INS231658065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefc11bff1ed22b2a8398f23e7711f7ee2f95d397f6f177d2c1f926047ad2d00. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/INS231658066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6277b4857ae586fdf0d71ad8e2c514d0fe5de7c6b1e3f6fa569202b0a9b807c9. 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/INS231658067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19be9b5127304ff0dc9de740e350f932b564d6144a5351afbb2349b7a5cc3a36. 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/INS231658068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249f91d2f0e091eaf25aace3f69c8e7d2dfdb3ac5a0bfefa5fe4fa8ad8f8b9dc. 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/INS231658069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf848fa5534b7849728f28ca743a5c3dd1c6c55bfdb19b94e33826d78fb32228b. 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/INS231658070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb846f0197b2efbec6a8eb63ba3f07329bbcd95615541b072fa037af1d39b465c. 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/TCAIZ2485840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feafd8bc879e9c97ebe61b4554cb11c532e979c840bfd04db31e1ca60769e06. 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/TCAIZ2485879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf4387a30ff44a7e54950b292c8276dcedf5bb4e83656747d9fe0967c9715e2. 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/TCAIZ2485953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e403ab1a71b728a7c40cfbbd213e265bf2d747d1f783328942e688af0886a2e. 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/TCAIZ2486007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f072c377ab69c1be98cd6bcbdd252df8fbd2ceb4bbd3aab2c631c81a435b7a7. 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/TCAIZ2486093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ffe013c5ffe54d16a0b9f2d88a74ce629308b412b4e85fe2247810dc4ff1ce. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCAIZ2485853.
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 0xa1cea8006804fa7015988654e57899ef76dea25c5911381fd96f2967fbb39c61. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAIZ2485894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab49dfeefad9435be71c3dfa51a7f2eb99c54583a7b5e26b791fb8df6d8249b. 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/TCAIZ2485945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0778904dc8513a3d7d8eaf44b1272797354b338b87b1833246ab61cee0e2b71d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TCAIZ2485991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d8e21932ab8f3a03ca1f4d4d32ed70ef2d0ead3d7f3fdd78a9e5ac72921f03. 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/TCAIZ2486051.