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 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 0x88c625290a6310c88987d7155c8cc45b9a1cc20f229c7fac073003f6ab540838. 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/9874be75-95bc-46c4-8bf4-6083d62824e1.json and https://artists.proofprofile.net/proofs/artist/9874be75-95bc-46c4-8bf4-6083d62824e1.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 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 0xea42dc9ab1225917f0d5610e0903a8724ae889f168fe3c5339cebe97921db31e. 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/QZK6K2474173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d41441c96d5bd0e7662f46f19055991b85185f20ad4e6a490f335201219dd3. 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/QZK6K2474174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510677b1a7e8229d7926a9c3912788daad702b0f5c26c80a10a482e6392c51c6. 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/QZES92374718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a11533172ad3653ebdd5ea75c1d1d851854e74d2742e3692aa72ab10427c24. 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/QZK6K2474175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e214c81f8d00b9529cbeb8b5daf560c6b8642c7fa619ef7702a44ff1025ba4c. 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/QZK6K2474176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123cca9de4a747c9c0f0066bf058025685663d9348340a14cc4e851201b59f35. 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/QZK6K2474177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947547ac8f1ea34d118704a6f53717c471147d69ce79148c6274346a3edaacda. 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/QZK6K2474179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bcfad16d0ba13955f84c4abf26c93c6bc239be4252dc709d853373b363db25. 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/QZK6K2474180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b52d578c4c8992214ebd8212cf9c4ccff4a324b0bfd49f347f5a7ee8e6b129. 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/QZK6K2474183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c35fe5e35a4ab8140d73ec5cd34906b80fe0067ade291885c0e991f41b026ac. 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/QZK6K2474184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32c70c2516441c3de2549bdd4fc97aad0140bcf8a584f9f69709d1f69dd2b8c. 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/QZHN82420443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653b80f64e580232d480cfe34bb0cdd14ac1ba471177bb0098064ad5af48e71f. 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/QZFZ22415682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a1b8c2e94c16a1bd75655f32d68593ffc85905ef72037e76f7f5ca6eeb8840. 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/QZHN92222597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c617acdbfb929c84c99ab887ef2ebad8c96cb3b32910f693e8c62d7bdcba6f. 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/QZDA62582605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e87b4b3f10cf93bbf262c215b782c62cae834ac20f7599832e5e62cd512afd1. 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/QZWFN2444116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eafa08d7b8c4a92e76562890f64068f4ac929bfc95f376c834ed6b876f211e5. 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/QZSYP2410790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d0b0ecf39fe5dbf63b65bf0d2ae6e99ce806ca7a9803f193d7f26688b1c876. 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/QZVEM2390753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff6fd67c90e8e5ca0bb8d19d9c53c4892fd10d12e54b10fc34d040511b58a8a. 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/QZNWV2326198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fb924651e87fc4c26fdae56a134980fe8aaf4352811e6207f99791d5582a8b. 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/QZMER2249023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7e1185e9e424352dda35d647d919820237c5eee66b63e8d64845fb5a0e9dee. 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/QZHN52100352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91d991d80fc90637d6d3666dcebe7465ab7be65b8327617a6b7a292897b4a99. 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/TCAFA2062573.