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 0x705f12304dce0a3684ac9d14b0fb639409b726b75775caf0c02359b7614ca662. 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/1a616f24-fe56-4206-9296-827092cd0ee7.json and https://artists.proofprofile.net/proofs/artist/1a616f24-fe56-4206-9296-827092cd0ee7.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 0x6469ab44c17a752cdd33384bcc880157810f28fcc657a5e3e57e4351ed0924bd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA092476090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353d5e1f6fd8d9cbd7a1fa6564c2ac85d63221437b2505dda18f7f4d3c49af2b. 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/DEE862102951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe33fa7fe906f47b1a80282417826b0e1d680cdbafbf9c0d4920ffb70159bc4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2329958.
No Hard Feelings (feat. ALOTT, Anna Grey, Averro, Dario Rodriguez, HBz, Leony, NOØN, Sofía Martín, The Holy Santa Barbara, Tiscore & Y3LLO KOALA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1ae6eab81df1dc04c72d0612cd5956c8d572f6a5a8f15b6d8b606b3829a3eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKF22200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6469ab44c17a752cdd33384bcc880157810f28fcc657a5e3e57e4351ed0924bd. 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/DGA092476090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6469ab44c17a752cdd33384bcc880157810f28fcc657a5e3e57e4351ed0924bd. 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/DGA092476090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf795b96db7db6064a558ded20a02df492f8d81e2d1d4225ecf174b3743c4630. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEUM72202623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2197ec3f7eb4fcad7dc4655f33ff2466e7950ab3ef92ae5e950fe3b50e596c74. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BEIW12200482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ba1b13d11c39bb4b04992c51922f3b209445d051f325c344375519bf4ba40f. 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/DEA622200581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51db9dc41b8b747fd1f0ad0b5c38d3196338d62a4fa92b4ce5e600e43d07886e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6N22444788.