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 0x522302fe47e35e990c7dde81b7aee8549d1b33857704541a98cbbf719dc8fd46. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85966483-bf4b-4c67-b828-12e3b382ecf2.json and https://artists.proofprofile.net/proofs/artist/85966483-bf4b-4c67-b828-12e3b382ecf2.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 0xa8b945f9cd30c394a880406390d66da772a4cd01c8db26cc01625720c1ec5523. 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/GBJX32332019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea297fca302cfe04c43186408ac20180a025f07764f804c7e4680af787d6f62. 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/UK74K1400797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50363704aa52d40000a3186867b673c05fa0dfe983c58c7ef55b2ee99bdf5120. 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/UK74K1400798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfdf99546f2ee639301aef0d653d6b4b21a07f36c83229e0e0a765b5e86abbf. 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/QM4TW2464568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389b6f40ec90b11d43d4281528824b99efb6859446349d0be454a726344da498. 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/GB7NR2452201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198f66256abcc2dee1f119a5e45b939cbb82f98e540b34a0088ce917fa3e5bce. 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/QMFMF2381812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37531b17f2891ffd0df4d65eeedb022a14b1f2b586b5342d2fc1423998a2e32. 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/QMBZ92364311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a00d380699138c36c20303a8684b880f8943c7106df39e79d010c46b16b902. 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/GBJX32232047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609faa4f1e9299160fd46d192c65db9b5e2fce9dd10e40086d2400cd412c17ed. 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/GBJX32232023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a73fb8310297ecbb56f9146a55ee63338c9dcfd048f15e66c83380c4f5a3bf9. 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/GBJX32232013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2129518ff537d16d9d6ab34d3eb2bfffc878d19f5e84123f864f92f7d516970. 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/GB7NR2328602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf314dc690a538ef8fae7c7b1f18398c6b25cddd53ccd5958b42e870cbc826e3d. 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/QMBZ92364320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad11311fd03aaae26c859af44768ce7974417c17e308360e24ae4eb7d6c42e6. 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/QMBZ92364316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ab9a172bcca12483fede9aff3df4f421d66699605c6d09b49a2d73a8976d65. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QMBZ92364317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37531b17f2891ffd0df4d65eeedb022a14b1f2b586b5342d2fc1423998a2e32. 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/QMBZ92364311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389b6f40ec90b11d43d4281528824b99efb6859446349d0be454a726344da498. 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/GB7NR2452201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f1d8a5e96dafcc81b9283e10c43842cc464ccddfbdf0754f76d4bd977e2955. 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/GB7NR2452207.