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 0x69375d7bf733465dd6e1fa5f87cfed34e97186c0d40b776136db5563e08c1be5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52578d97-9184-4135-bc14-9aca0317e472.json and https://artists.proofprofile.net/proofs/artist/52578d97-9184-4135-bc14-9aca0317e472.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 0x1ee8498b2207bc46b89b908ff60d585f255de36f6a54982ed6de178cd38fa0f9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTV32340584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab102d110c2f17bf45145031b701e88cc4e2a01c56641ced21742c1d896caeb. 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/USLZJ2558569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92774e505bc4401baa05e104e0fe7fc70a80ecec719b459396dd5c1fb8a6e5c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZEC2405799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2ed2c910dfb4d71a31a661ad8826a88e1ff99437543cb9bda662d0c2c2b4e7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWQ2414944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f0326e12b4c006d28909153ede3a3eaab10880ddcb66d96b73bb15f66b85e9. 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/QZK6K2425877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0548a22ef4f9cb967de9d784983642cf76597435f0872d4ec9c001821af96a15. 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/QZTRX2408052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fb0ad717d2f49fd06d8e9275c39cb2c62a868397c1f1428c2b3b593a1fc487. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ32478310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715f2b6ce33998061d5d1d1b212b944579e09a508f0a8683a092c6cf8e6ce8d2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTBD2366558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8296817d720874e96664cad3bb84c330463667fe332793549c7e6678c173f0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6M2325547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e72459867da1fa2bb0ff5b65eff936d4cba5201091849ad2f806805ee52d396. 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/QZHN92397300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e18489e7fa7f196c01c31c555e53743491137f9eb83a7500a68f8bf880df470. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA52388334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab10b3aed45ce55f77752b8f6ef04de0210f138e361853f10fc6bb78b4cc677a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWX2291332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd304df91bf3b46d08cd6dcda8edb48594c5476e9aec27f9fa931fe388b0015d. 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/QZNWW2283887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48365f3d82f6aa7e4442ffc50cf158e78c506e939131885e0ad23a7ac9b3a42. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWU2230464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bd788ea7aa10e1c66a64224339e62d589e7c36604b772fdcf04be083576d6a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMER2262669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1ace41ebaad3bde40cc6ffdfe9d4ac742a5a1f18599f93fa2e67b49fa74730. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ662455061.