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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52c61a6d1c62fd25bf0ce444b62fa2147e819b9f5e3d225d492ed2a618c9204. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c6cb265-28cb-4b94-bbd2-ef4a291c079f.json and https://artists.proofprofile.net/proofs/artist/7c6cb265-28cb-4b94-bbd2-ef4a291c079f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee19fd84fea0acf7a201388b9c0cc67742ff8b3999693e3e04c23651d272be04. 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/QZKDT2400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7f71ffdd12a05b31201051da938bbeb86118c2fb3d3a32fa4cc97c316eb41a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZKDT2400478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6622ad678306b02898685f4784634683286b4a6073a5bbe18be8b43b2ebe26. 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/QZKDT2400468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a2002c0c604d603bca2a23d976506f8b69a43c3ad6c898c0b31682609cabbf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZKDT2400359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d004b6848162a0e6362c6e60cdbc4df0c0c85cebf2106b8547c34a4a70dc764. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZKDT2400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5fa902a47a1de9e220e868fd53af45952c85ecee8fab357ae00d745f1c70b6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZKDT2400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2209ff42da4ba79a89d259ffd2a208f401e938d3148c0bb347f1f26a0d32c1. 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/QZKDT2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301ef72b993ce6284635e968b696a87d63e140aece7c18ca6d6ba6b7ff21f6ea. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZKDT2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fe65b82bb538505cc3027d7e8f88d425494630cf2a6c8f504e464e5f281fc3. 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/QZKDT2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57079c79a0b68f292b8e76260d67e519224c924a8b229cb2a3fce64b4abf4e00. 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/QZKDT2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0fb613121edc0c8cb381ddc12d0736f68ce8a026e59ae37a7cd34d109839f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZKDT2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6edbf9bd5a4e4429edd0cffa5e96808d686d2ad1f978216edc956d9370d0e9. 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/QZKDT2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e924c04310e4bab9b8ec202b42461c4a0bce8a1647278daf84693a1a0c047ab. 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/QZKDT2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00126d72c2573ff724f0b8aacb2eede0e8f17642a075a5bdefdbca0626fa98a9. 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/QZKDT2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eeea1b7917faad9a0ad45672eb088bd3c7a7c8e64ccfd73cd4aa993a7be1dd. 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/QZKDT2400707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449d6b58538227808dd35e0b1130420b1e8b3db1a9a0ff7bb7af843a0316562b. 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/QZKDT2400697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ea20a369f68b3e4be00c499ba1e332b2fcbfed2e484f670b79d39729a50466. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZKDT2400568.