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 0x927ca087baaf65f5af15862797905c8ca417460f4fea8d3c136f2c862ea36612. 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/3a17f62d-c2c5-427e-a618-1c3c2fd0b6d1.json and https://artists.proofprofile.net/proofs/artist/3a17f62d-c2c5-427e-a618-1c3c2fd0b6d1.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 0x44d584bd47a265b78e0e60eeb0677cc581c59c198833762c71b8c5c7245e8e50. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA072223729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7198c675526edd6727a7068982729b2457e9f9cb3e91b5960165e6a5a3f42a9. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/FR2X42398829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe805f0f2006442b30be807dcdb0c1ab61c12b69cfd624ceff0fe5ca5ba4d9bc1. 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/IND862402967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8274b1d80760f6194193e6395691e3496658ffe933e1f35b1e3e853a8d37e255. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IND862404362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a34101dd29655a3fcdbfaadd4e5e5b5785ce15f7246a0523915bfc75b26c1c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/IND862406123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2644ba7ee8ec7edff23fdb02e1b24e20d8c3a53073ebdcd7a6a493cf068e4f1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/IND862408823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02755bdd53c0f0bef0860ad418f29b9e06a1e5149b2af671557f7b490692df8c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IND862408898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6268bf0b6d3dbf07f33ef659a3e8a8f89305ed2d6ab7803a8cbe53d7387286. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/INN2M2400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9100fc27d9ae47ef95b7ab31d3277c4b0cb18941bb835aef5ee95e3989914b. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/INN2M2400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9a6c529a2342d9277643d9fe0aaf7fa5e04845371e239e8ededb9636ae4e84. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/IND862501147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0ffc3b546bda296c3562725f6452ad5be8153c2aa6cb9ef24bea8cad4defde. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:36:56Z), 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/IND862501296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172fe253067a0411b2fee73c7e429c3608394df667747421c28b17233303938c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DGA0R2333336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d584bd47a265b78e0e60eeb0677cc581c59c198833762c71b8c5c7245e8e50. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DGA072223729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e9ff98242d5bedee25137c7df63d0adecf6ca1101b6ef6375b15c5d50d88c1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR2X42301148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27803920b97b3e47ff58156cb45f520c06bb8a37aff5915e1327a3d2a0491cef. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/IND862507188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9745a64a486aa31c9c576b59beb4f879088f815088adf0c88c732d90bd847822. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:00:21Z), 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/IND862507364.