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 0xfb0bfd28e1684f0397fc24d55d5a5083747f21a92041db5800552a94d1131a18. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50650f9f-a1e7-4400-9c71-22f8172ff109.json and https://artists.proofprofile.net/proofs/artist/50650f9f-a1e7-4400-9c71-22f8172ff109.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 0x3e7143569f7078185210506e3bb27de8eb4f9ce6a9812bc09e806ce8e2f8e527. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN42216418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd991e4f3cf755184d6e927d8e8967ee12378e73775f8cb70f497bd8e037228b3. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:41:44Z), 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/QZNWY2264575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6b97b4eb4e1711f6ada2a10a5ef4024a065fc9a65da70046dcb3fa81360b46. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTBA2284526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c044a5901ed5f2a2a1bde4a5f59da782f1c75e726df5a76194b3d60df5ed16c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA62388127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761f1d8e338bf8d90d63531e526a4a2bd56d82d344115021c67fc1d7e066f07d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN32390815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0e021ea92591e3978661814e4d4dababfe801097a9b97aaec288451f680050. 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/QZHNA2369204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb160b007e685fdfe4a51ca4e467ba849c4926f89658b8ccc7c3a01af22fed00. 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/QZTB22392281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4b4df6112f0698ae16c5a1ca1caa9a9d4de3a188e32d8e04c47a6f12ca22f3. 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/QZES52453629.