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 0xb9bf5abf4c72ad7c4fc3d91f25e0e045e844bf547375d7e85cf252ccf47ccc57. 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/35bcfd33-e595-4fe8-bb16-deaf3d7c7a00.json and https://artists.proofprofile.net/proofs/artist/35bcfd33-e595-4fe8-bb16-deaf3d7c7a00.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 0xf6580e5b2217bda5858822d75fbb1681a0ed4ea28a0f69b7a10ea13664d80384. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCACW1762274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33580a376e62172b853ca0184c219db2679f607266bfabbe171d3ec1fd4100e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACW1762275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbf9ce506986b738a5dd5ac80c7756ddce70828020d322bbf90a4f4556503b4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACW1762277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b442c6abe1c8db49d23692c78e4aab20abf66dea56bc839c36ad1ca5bc5b2fe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCACW1762280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c82fd43512ad21c197fa69f2d36fc88a798f654aaadc7e016f9768db8e86eb6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACW1762283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e62cbf05efb8dfd9ce379bac4db59873d779aa075ed9cb04c49ce5ab778ea7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACW1762285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6313fc4351259763ecfe70fdb76baf5b724c989abcf5a2fcbdb43ced6289585a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:46:59Z), 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/TCADA1785371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc664ad90b2e9ed3be12df4797c3827da95523474315a186373c745e94d4016. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCADA1785373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fd118fd7e97a84566ccbad71d35066f0bd106cc428be7ce44d6cc5adfd53cc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCADA1785376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa3a43ed7717d184a6358482b1700fe64bd10d543160d0a07b199622beb6411. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCADA1785386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c86311cfc674e94abe48543ce7fbbfc16984693e02dd97003b93164f9093e7. 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/TCAFM2191029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f6ab8ab42ea70f002eb303e17c8300e76187288a42a24add8180c720abf9d1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACP1614720.