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 0x5427486aa13dd5d9ee7d998f9e653ad28016f42a0c3cf65516800afe24bdac8c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b664ef98-8064-4f42-93bb-41ae8fe2fd15.json and https://artists.proofprofile.net/proofs/artist/b664ef98-8064-4f42-93bb-41ae8fe2fd15.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 0x95997d42da047097e45d3d374321ba9fcd2233f2186040c8390e36ad2a7e2e34. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:42Z), 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/TR0421600266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa858a15c13ac2d9bc90b87f2a283515cc99037836e9638041705e869202c83. 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/TR0421600219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf488c047278fe70d6605ec8fba443cc84bb541448873692eb119dfb8a6ca431. 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/TR0421600234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baa8d4bd0cf5c54cd147f8c1d7886d828368f38fd9122a5592c37302c5e067a. 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/TR0421600220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46632053bf211e49a433dae5c0ac4b6e12ae55033f99505057734345cbf6d832. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:50Z), 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/TR0421600221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a38544928f06ac7f7f90e614a292dbcef884cc60e2b5731d64d63b8b9118ce. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:06:25Z), 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/TR0421600222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba46c37efa7f1bcc4792ab79c0a9d69800d681e60256f04b2b127a21ea556f30. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TR0421600251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ff1bf8ac12c7cd90c1cb092e20a0604dea538ca6b91a47c16133006beaca00. 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/TR0421600271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaadd8d05af745e01a48590211a6550e0590468e64d5aac77df30d50acfc253. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:10Z), 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/TR0421600237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37146215910f4bc3c1aa5d1b0c54e04c25bfd14b44c98d60dfffbdf8c932810. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TR0421600272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd819eef6859a0de5e51ebbbd427c6c988a9e447943450d4723b58cdd030001cc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:48:58Z), 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/TR0421600273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bf522e004a7a77d362debdf11620afa4df8cc598d8ec1825a2a463ac78b16b. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TR0421600239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b8d9029976d7db9e477bafed1dad668724404481a385f23d830284529304d8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TR0421600226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8033d12546438e32e046248ce641dbc2c620a1711902525633204982c0b132ce. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:56:56Z), 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/TR0421600274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafe223fcd775abb832a7d3b9c869ffeeb0df569c5feba19a9ac73939f536e61. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:50Z), 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/TR0421600276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb409f3a0d94cbcdb3e4ec507106b9378559c17b6ce3f817d9eba1a1e9592411f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TR0421600243.