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 0x7b0c232cb931f14c5745202cfa0ae2e216e863fb8c8d91fd6fbd3bb47919fb7b. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/863ce1ce-aaad-4a9e-a0ce-b8f07798ef9a.json and https://artists.proofprofile.net/proofs/artist/863ce1ce-aaad-4a9e-a0ce-b8f07798ef9a.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 0x703492775b688f72327c56aed11cd5f25e3642311b004d44a574a8d5247cc27d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ITYED2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cf1ad74f580bef2cdf75ac12206f180ffc3efa5d78993c437318567468f776. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/ITYED2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09728e3411b9b833d1c3ceb4290e0852aaab23e248ae7c4796d5b5904ebc8e8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ITYED2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220a372d027936833136e176309dd77fb25d65d73a7e2510356df48f7ca6037a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:10Z), 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/ITYED2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5686dbe6164dc3fea8b94bfc423736f74f10557c1cfb623cffc3190bd22931b2. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/ITYED2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6270af25c4fcd91bb445973a3200fb9b2269f82ecb00244a92433c4a0d6023. 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/ITYED2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f58f8573a8e0f19c6c814bfb0eff1cf11873bdee2ab28ff2940e308d39b83b7. 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/ITYED2200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585f8f9798c1f6590445970adabd56ef9dabced65270134f03d9b0faa8bbe7b3. 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/ITYED2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda54b8e51c77a95c1e7ee9ef249a568e749428570f8e8b731c6484911ee12408. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:37:35Z), 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/ITYED2200233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f81b362b7dbb5163573bb9f3f2650f3818c15149d4db097ac743beae367253. 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/ITYED2200069.