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 0xb3be03730450599c76eef4caf141dd540a4bf90d81b0500404747ae351d47a17. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f701acf8-58df-48fa-99b6-0600851dec86.json and https://artists.proofprofile.net/proofs/artist/f701acf8-58df-48fa-99b6-0600851dec86.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 0xc0ef5fbc402ed80cbdba68049ceef0c956e0abf83f5c2636e20f0a1cd0a18ca3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES64E2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8b5c04874ba778ba75bcdb0a7558caca07606f17229b355d6cb1a3cccadd65. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES65E2100123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4178585119131bfc1c8f85f88a3ba96ea78a49d3e326f78c18aa3e942314c69. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:51Z), 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/ES65E2100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c88acb60a50e4b7537d42552e5571133aee60482e098614f69f887d0c406182. 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/ES64E2201595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa518f1cb8eb6d128d7c93bd87c6fb70052daeff97b7bb318e7a78876b4e45e76. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:07:55Z), 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/ES64E2205483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb33e2f5e1eee8245a566b08bf68daff93b3c18656ddc957c19717e8d4cead8. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ES64E2481542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081c75b7b8194194d44c980508e55d33de3fc0872f77cc6f1c2de0e5114222a7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:56:40Z), 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/ES64E2516528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01d76da85b5849c5446410c3b023b3751f0c31e0c7888fe4ccf91028161ff62. 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/ES64E2458708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511088b655d2a30c13a9dcd45222374891767cd6dabadd654d0caa93a3a6f200. 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/ES64E2300179.