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 0x8c869b6640a10e003284c166ce9255d21fe73b75bd2c78d699a72f3d1f84593e. 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/84cfb49d-460a-4e26-b2cf-c80f2ed64770.json and https://artists.proofprofile.net/proofs/artist/84cfb49d-460a-4e26-b2cf-c80f2ed64770.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 0x00e137635752c0e12d9d0a8a5892cf179f1df74b27586c039908d2739bd3d2ab. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/UKDE21500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e2043b2260ddafeef9f5fb5d4e9c8a21a2e39a5ce33aa5854d71d6780e3811. 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/UKDE21500106.
the sum of the in-between (postcards version)
eight hours (James Vincent McMorrow remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86859f48d12ebc6d22ad15b721437d3f5d05e8bec4572d5a8d7cd6698223b20d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UKDE22200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4acf0f525b2e9b676577f0f23103951c647748ea413fd6fc6e145aca373509. 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/UKDE22400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65146fc2bd94d34352764c23c96bd632034a4675ecadb5c3851926687cc6e465. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKDE22400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7271acc76c90418a7c90e31253be3938e6e4eea2a47342db285eb29427482b3d. 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/UKDE22400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9feefb05fda2bef326bded818135f6b4d817b583fc7923e574eb9da4217e65d. 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/UKDE22400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251c1ce10c66e01e8c992d05592d7967f8edb2cc644ffc2b0e620f038f89042c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/UKDE22400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f010af60e6b716e3edc2df60284edd6bffb7f21201df73bc547e3189564f48. 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/UKDE22400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65146fc2bd94d34352764c23c96bd632034a4675ecadb5c3851926687cc6e465. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/UKDE22400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4acf0f525b2e9b676577f0f23103951c647748ea413fd6fc6e145aca373509. 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/UKDE22400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7249a7bdb3c352ae0d284870fbf4f1e61481d47454d201ab0ffd1719df662b8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/UKDE22400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf97722469794c3820ee099f345d2378868550ec9fced49537ca820cd5ea25d2. 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/IEAZG2200026.