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 0xfcd5be2810fd500e89d7e28297b811e7a53247c0646f6ad36743c088d77273ae. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c0dea04-6db9-4745-b8e6-cc380745cece.json and https://artists.proofprofile.net/proofs/artist/2c0dea04-6db9-4745-b8e6-cc380745cece.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 0x825e418a2980e27ee72564b3057e3797b9f599b2b4f630703c2b953c1b89020e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FR6V80695741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e4f351a2c185ea101dd9db2d42d670a3ae889a7ee83cea5fca1000386b2d6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR6V80695743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa823888b401247d6ada2598d04de30e892423495f10c21bef6fd2ad80352745c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FRX871514208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e983cd7c1d8c721262da745ab542c2d149e102cffd391055afdb079c2b05bf8. 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/AEA142212705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d4d4acd24b5d02973d3d3bc012926039ba95d795b39c553cfd61d516fc986a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:11Z), 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/AEA142501098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95609710af92522e3ac96d83f021832391c61dbd70d7cdf653b237c6abf203c9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AEA142502872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba231aa68e21374f28300020ba22452273aaf5494c207fd3063aecb7caf91da. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:49:35Z), 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/USUYG1736890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5922a409dbe555502adadefdfbc1a46c3a401ed074b53c01b9a9586e75bf05. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USUYG1736892.