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 0x95aa92aa501df3300ea45ab82211393a33806f2d51d53f117f1510237314aac4. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/366516ab-ec27-4297-8332-68d711414ae4.json and https://artists.proofprofile.net/proofs/artist/366516ab-ec27-4297-8332-68d711414ae4.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 0xe585ae34dde25ef3129859addf9add513d244502434e40fd2b0fe6a58dff0c09. 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/PLF671300351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf682b8a9841944670be39eb800208d0f9efd536ad1d3027b4910a00bdec404c. 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/PLF671300352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f41007e31346e07c6b4af98ee2f36a4db3720176de0659ac8dc4f2c2e768f4. 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/PLF671300353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ade780c5dc687e8e6e4b0aa9377a5900e50418de4057d89f2c0667a776c88ee. 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/PLF671300354.
Nie Rozmawiaj z Duchami feat. Bogu Bogdan / Quebonafide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d1572ab0be36832500d33d92c65f90c66998ab829f7af4d8d8d9f6cfa9d2d0. 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/PLF671300356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbdd534b1ebd3750de732eaa2ed2f6ba3b881dbca9b8f21a24539e0c8001257. 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/PLF671300357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192be89dcc1a7d7b42bdddefa48941b61321f98c99b7c771e543657f4dc3d2f1. 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/PLF671300358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06db39bde1f71a0973fd2eb9ebcafb81f56a410436bad34e53f9635ee33c9a6. 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/PLF671300359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebbea4df3168c88f6e93a7c5cb32771494ff852087bc673b0a228a649db02b9. 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/PLF671300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9d12a2bff9b45770683a122a6a2e2e34244df9947db6c097973b279bef86ed. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/PLF671300361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119126dd4bf43c3c41657a6b7a76a3afd57bc4a493f4853981da57d72a67d996. 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/PLF671300362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d5a2eea0404d67e87db6460576a46888fe13798bd5ba5dc58835b7c16d93c4. 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/PLF671300363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063815a85f4cca46604e8cdc67ebb32d07241eca92108b7c996faf47edcc73db. 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/PLF671300364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7db76a450246f089c9b6ed3556641ffa3a82bcc0d6325d65ec1c18d849db5fe. 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/PLF671300365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe190ad5e033d5f072c98856755e9cae963570c15fa0f8b0a384b14735e9227ad. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/PLF671300366.