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 0xee3bb2ad7ddfc9cb08d6588c897c9e306ec73b1f44cbd9dd31692a28c8a29601. 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/faaf7e9c-6899-483a-87da-3805d4afb105.json and https://artists.proofprofile.net/proofs/artist/faaf7e9c-6899-483a-87da-3805d4afb105.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 0x7810bdb016d5ef35dcb0e6a093f77027e32b480086e6d57883548651b89edadd. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:50Z), 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/NZRI12101929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fd3216fd56ea22c8976bb580c0a7d23de16c29aa27a60de9d305421b6f943c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NZRI12101931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f9735579c32c53c49d1adefc381fadbe9f12cb8699c110468ea5a8705cffd8. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/NZRI12101933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9867aafc0a221825343b861b74c81c2cb3aa8cc3ca1861052faf6c6675813a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NZAM02400441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc49978906fe77dfb4a2cbff0e8c4e4d134fc9e70019daa9eda8225f1740269. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:53:58Z), 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/NZAM02400444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f003553e7024f8ad217aaff760c8a54103e6abdfdc26870635cc193afd64bc2. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NZAM02224802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e789e5f3efb0d6ab9bd2b7b1f6854243087a02f8fe314ea5aaab7a2f7718656. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:47:03Z), 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/NZAM02400445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa654639d1297a91efc39dec63c93aef1f98b0f3b4524b478bed83f5439bcb978. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:28:31Z), 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/QMDA62540041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83833d9cdd0146c4eb0914de3d74063bf56f7ba2c4e76e83dff2f54fca10ab82. 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/QZFZ32025621.