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 0x77daf29ade58379f60675d5ab9f079f51f8eed39b5a2ddbf083cef6b6522dea3. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7831d96-1a05-40ed-bed1-ec9c8cd263d5.json and https://artists.proofprofile.net/proofs/artist/b7831d96-1a05-40ed-bed1-ec9c8cd263d5.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 0x3b714701a52165abe9d34039045731ec04ef6c326c619e570a36996abf372ae4. 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/BR33T1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668f50b399b1ed39e02a4977caece919ea6b0efb47b96fd983f8c5e81e03c627. 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/BR33T1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfa097593314002b219636581ab5741c2e37192cb8f97dd3476818246e58e14. 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/BR33T1900015.
Cantigas para Odé | Oxossi 1 - Oya Funan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c08e8411418707e23b1eea0ee23cead0a22779e21f6a6ec3fa0419c1063593. 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/BR33T1900016.
Cantigas para Odé | Oxossi 2 - Oya Funan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54530cfd75d44590c300e23a22ee68413a9fd79d42c83f47169c78fc6f3508a. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BR33T1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11abf56d63d980b54d0e6f817232654174f734b65192a362c4c5b96729b7108e. 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/BR33T1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f950e917034ca7d2daab5f74813a5e5e5991cff07e59fb7937e0f1f51f7dd18. 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/BR33T1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf5a85ac029418a37520bef72b2d01e99227c1c33aeba979a3558faaf6d143d. 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/BR33T1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8432685187d0132b512d79ddab71a59211c4b69d783c32afaae8e15472fbecf8. 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/BR33T1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3746ceb2b403a8962a9ab52f105d685a22bc1b43339b8571f173c40fead5d56d. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BR33T1900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b54f28071f17caf0c59d21a1461b148d1cd37e4f91aff2c0c1f5a69f63bc0d6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BR33T1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4494f33d8bbc43be9dd683b5505119a79e9f403ecb8526c533e591d55d71a4f5. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BR33T1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d74265b5c8653ffd307ad61562cec364bf04b7977c8db3238267ce0b79c1b73. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BR33T1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd364154c0b8023f887bb099afa8c6cbea58aca6003d9080f3a01b47514c4ee. 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/BR33T1900026.