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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0232d0ca75d6bccbd806d4b9b4f5a82583bc362f974651eb1687c6b4efc1b371. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fca3a820-65bb-46ee-bb9f-bd56fb17b2b6.json and https://artists.proofprofile.net/proofs/artist/fca3a820-65bb-46ee-bb9f-bd56fb17b2b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Little Pretty Thing (feat. Bryan Kessler)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff97f477fc518ee835e9cbc03575204b3a96c0a42d5534dc6f6dd8b1423c0b0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCABG1289810.
Little Pretty Thing Instrumental (feat. Bryan Kessler)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3142a928f046d409fe98303360858f6329c3a04d6353d77332cdb91e250f4d03. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCABG1289795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51ba94c1988b2c09a704f096a325b0cc15b08780fb86273a1026f19ba2c7362. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLHR22200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6c113d5f10a2dbc27f978a124a70d640f368be67e0790519b898046f50df6b. 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/FR59R2384997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e30bbf0c54756dbbbe60256c7c51e7c5d2c851ecadfcb299c5c25358d3a568. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEEC31810131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5718a41794ce4ae6701bd6e31b51669baa0e332cefd8ecdff3d3edb3ba7e0ed9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU671401814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3586abb1ebcb9baf2c9a31b36750513febb299ce0dbf822049dcfc64add38f9b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU671701443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5561621fe6fba730460666eb9b788bd0064bae3d4b9473fe12424e8efb5deb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU671701445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aabed5c3fa8d5a6f5b060777dfb19a3d41e6dadb21fd3ded18cfc207c915066. 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/DEU671701446.