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 0x6fc206e2b162539d7c0c2d1b4effeefe85150598f9fdb703a68cf581233ee506. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3c73758-c50e-4f03-b2d5-363bab056784.json and https://artists.proofprofile.net/proofs/artist/b3c73758-c50e-4f03-b2d5-363bab056784.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 0x57387b382665220108f67b717be572ba1c3736abfae698379f31c98be9529e11. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWV2222102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e436763f0accc006cf291f8bf37731960078760f620af955614edeb380d9a5c. 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/QZNG92400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f755a61f533ad065e62096a6f0d2348debe4b543786fa8965970de2907663a9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNG92400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2b8bfd19613f60d991fc8f398807420fc892314231eda29802124f6f4c2b8d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNG92400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d2390849b52b4d64eabb413daa72b02c0cc242fe4214669f6019d41d1e5b55. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZNG92400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9a35a416256ebc6ddbe0a55afcd6043ebc0768d182555189ac484870f03e84. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZNG92400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811dd584cf501f334f4559de0eb1127309432ec12f19d8869eeb68a02600ad0d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNG92400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d2390849b52b4d64eabb413daa72b02c0cc242fe4214669f6019d41d1e5b55. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNG92400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e436763f0accc006cf291f8bf37731960078760f620af955614edeb380d9a5c. 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/QZNG92400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2b8bfd19613f60d991fc8f398807420fc892314231eda29802124f6f4c2b8d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:04:07Z), 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/QZNG92400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a861b058da92279372918adc4cc53cf39ea6c17df27104fbee37be702fda5a2. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNG92500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7590a4326b44d2e84179168e490f59d01e2ae11545d55215b8991fb3780f1ace. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:21:34Z), 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/QZNG92500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d458749cee0f2b28590daa93db9f46e6803bc5a8628231542969101c505563d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNG92500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d1a639810a1f77078e0adc7b85426a13a74e8bdbaae86f6f287c09c77d80ba. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNG92500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d170ec4456b4413d0384962f76dc9e56939539dda75af785851476e5d6f559. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNG92500054.