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 0x10a3f9011bb0620011a5384f30081932e3a1df9b0186d0af6ea08d0ffa516a37. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8895ff2e-038a-4283-a40d-aa588041f90f.json and https://artists.proofprofile.net/proofs/artist/8895ff2e-038a-4283-a40d-aa588041f90f.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 0x4d9cf743ad822881f801330a761b419cd69d1f7a62e56806c2eb50a9831b3679. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZVEM2557205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647ecc56aef4e48e208d7bfcfd2ad5a1ab82da80fcbc18b3ae9a8766a5ff1954. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZVEM2557206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c7e2b1fa4a64c0bef51ae4934729877112e0e4ccc3ad579dfe1a9322146761. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZVEM2557207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87255d5a0b6e7aed6a6a64b5269676a320afde594557f46a064823564852e997. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZVEM2557208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbfc8e2a6219396eef9ec6a272b91da96aca4f6c0345c864191d4f76f285d3d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZVEM2557209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b8a1e9a758c4c45cd84a5b84fa4e9e1abe9c0cd66c0dc14d9564dda22fe6ad. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZVEM2557210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3ba5523fe935788b652b813e323da99776329550b21983ede3fcdf7bb904d4. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:28:46Z), 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/QZVEM2557211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ae90e149ad6175490bb6e0485ebeb47a8c5239f9e9d18c476405c696ab19b7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZVEM2557212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6968ab9c7ad02ba580b3668d5fda457e01f7ea2b59015b1b9a9332ef9526f4d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZVEM2557213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2830b5832fdd08e69393711a20d6f34c2827b0a0fa29f9e275384a5507ccc13. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZVEM2557214.