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 0xbdeb1c7e1cfb80800fa93279dcd67658afc01cc05253880c055e6298816eefd0. 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/1bc6927c-758f-4c80-af4f-203cf98bf880.json and https://artists.proofprofile.net/proofs/artist/1bc6927c-758f-4c80-af4f-203cf98bf880.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 0xfe151aed16f8960f1e8dcc47008ed124c6505980880073c2d30dde3b89bc06e0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QT3EY2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856a8cf9581f32fdcb39c839e6c7c426ad3908f09530abb23ead10c09a75617a. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QT3EX2497829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631282d1e911d8773372a3a48d90af7a4263ca5a5ad55cb4b99652d637b20492. 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/QZWFM2476074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4eb2c25691266fb8b9516f7f7c9d8801b0c410f3877daac945321269324d43. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ762482389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0b0a05f8d5f4389b95563446aef11b4271fb9ce0fff5c88b93d3741b3d621f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QT3F32448690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450ff8c79d5826e15b4f0671822f46de3e75e70c59c190496dc26b81a0272a78. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:06:52Z), 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/QZFZ32562225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539c3a01f9a03891e5ca39b875963f6d397ec13134cf1dffec881021ccf75b4c. 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/QZFZ32563732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f0973a2013037a3e8350ec5635413abc140e0d3053249b9bd60dae58793f2e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:55:17Z), 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/QZTAZ2541840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7af86cf1f798919d966617cfda7a8e644460c694e82e5a2da0b76877ee6777. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBD2552791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1225e6778a44b3819cc66e0356a805bdd960620e521c6adc89cca06ac45e60ef. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ7M2589382.