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 0x6e79cbee230f26854779c45e59286534a6cc11ef524617cbafec4e1a176e9e66. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/609a08c4-dbd4-425b-8ac8-92a428d4a478.json and https://artists.proofprofile.net/proofs/artist/609a08c4-dbd4-425b-8ac8-92a428d4a478.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 0x0c17e3ba048d0d759e0d1491ae82ba202a1cf94c1f87b47322f1c9b3d0f53be5. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:54:30Z), 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/GX38U2156651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d1be5f29efb5635c353208ddc02490d9d22842ae0752222b7348489e71c85e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX38U2156652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f15b5156a3db9f817e37e3976edbada5f2a6fcfa9afd044af6a8a10fd97a8f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GX38U2156662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e0d26c0ece67cf081177af36fef0472e5ef5fba0028f93896dd5102c5ba89b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:39:34Z), 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/GX8LD2416894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f66c93ad97d8f6833df1cbd6aa1b033d3f2dccf9955b340f9873f219f734bf4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GX8LD2446676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c46ea6e5f88e418ad262beda7fd2514e8d991a296336a415b9d90f925573d9. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:20:32Z), 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/GX8LD2406540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68db0c7b6a055235904f17c2af6205c7f10ca0eebc4641b267df9d2f865f473f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX8LD2458247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e088c5061b8e9722a026ae4dcc8128016b5462c13cc275726d0d4ad4cb7c7a3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX8LD2404849.