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 0x8d0a4b1dd6e680939933cf8fd64c55e66d490dcac460aa9c923d2dc2a95550a9. 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/3989b5f2-0e60-49c9-94cd-695972ffb148.json and https://artists.proofprofile.net/proofs/artist/3989b5f2-0e60-49c9-94cd-695972ffb148.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 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 0x22d6de78985bb7daafa0cea495dfb5057d986a5f597f27f8adbc30f2a15db289. 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/USHM91126331.
Toi Et Moi (feat. Milca & Arly Lariviere)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac4b0ef07a0b3535c28ce71c8a01c9d3aedbb7c254688e9b1c503485948c123. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USVQ21500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb49fbcc989076b0d9ad610852cb0933cb7ecccc6e2809d0d105f574813b1a30. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USHM81936131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86cc636b72c158f778a2af0bfc39ea8ab91568a51a78a64717e3e9d0cc22474. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM81936134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778dee4557c7962f12ae72e754ebd26340ae6e8b18cdeb94e43d14be5288050b. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/TCAIA2418790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933b412b327e7435f133f0428f18ab4f7ea97d136dc835d8e9ceed818b463856. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCAIA2418817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d35a22aa009e6fef4ecf6cc9b95c4350ada8a29d7810d1f6d50c3d06733595c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIA2418860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50936e36705a76485ef004c4a341e11b6ae3b2d8f44c8596153f981f9a761bec. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAIA2418946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2542e80a2c9a275a138527216bca5d1c31524377ed7160e09db833077fee5e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TCAIA2419002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24d0b135e02f68118330e37c444f7c1583a8abdd770dc03649beb7afd853d21. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAIA2419510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652129a9101eb4f62818bfd8c21efa2888ca42aa0d973a758efbbc81ae19cc43. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAIA2419046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf649537487a7bd990c2f6b5e028e8f1b79237b772920e64a0a95c3f44960e5d2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIA2419141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7465b40016fbcdaff28745d9ea1eeef4b2ab676721bb0bc17f9ed4c54cae39. 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/TCAIA2419589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2e96ec0db2d806d6e629e80e2c41bb5e5701a21e44af64b31cb47a24271b64. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/TCAIA2419733.