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 0xfd336d9cf3980822acd79cf3c2788e4c1576bd8f38a025eaf7baee08db6549ab. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb21e0ed-2ba9-457c-870a-741d3363de57.json and https://artists.proofprofile.net/proofs/artist/bb21e0ed-2ba9-457c-870a-741d3363de57.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 0x6fa0da9b1155beaafe3bb1570d60df0a82ae08a649264992a7e355eaed284f03. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZHNC2260780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf373e6875c06ec10046a92646362f4d9e8d99527a0a0a911a52966680341e9cd. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZHNC2260781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ad874aa22e5ccf006d719186e73122ab988c5f57f577559602f4839cd70a20. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:42:48Z), 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/QZHNC2260783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eaff0e494e9c4172be4e872eaa0bd041083173aee557f4f0a18cc5fc77f49f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:34:10Z), 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/QZHNC2260784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa991c1aa5162d2f15240b8322e157445207868a760ed7a720c385b1ce517ec48. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNC2260788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e7889b10aebafcaef6457905b92cee550ed4882201ec24f6210534df5c8cdb. 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/QZMEM2256133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9484c0116a10219f4490f471e4fad9f6f8a22f9b4bf5d32235ac2ae1bf264feb. 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/QZMEM2256134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6aa8c8b87a168c6786ac2d0defd293090e4aecbc96579a83cdb26edf5455ec. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZMEM2256135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1657cdd0757b163e8e3ebda10fa4dd936e96062cacca064f17e47bfcf938d6e2. 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/QZMEM2256136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5bf5064b0ce03eecfeb86b50f45f8ed048dcfdddb8d9527ed842c6c9f988d4. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZMEM2256137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850fb5d3ef90cb004474c2f00677d1d5e55889e06bf14978e6b1daf827cb5f24. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMEM2256138.