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 0xef2b711c7a39dccab959a08675013a823da60808458bca20fba5ebf0b88b8700. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbde564e-d784-484f-8e0d-0cc9b5274bbb.json and https://artists.proofprofile.net/proofs/artist/cbde564e-d784-484f-8e0d-0cc9b5274bbb.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 0x80b6a2d08b105d105636a2e44b1b6d4ecf7ef9e6d9e83f9abe3d9413f57443e7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:46:52Z), 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/MXD781902760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7c0bbb83f9e8756cfc2249981782fa6a3817e649fa72dda634670cfc944c2b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:49:14Z), 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/MXD781902762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ff59fbff3aa960dcba04f0e7a9badb4fb034e4b8374eb9bf569964075d8bb9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MXD781902764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ceb22afb9499f1473b30d4861afc7869f8c6f5d0b6acd3faf04efca6ff0c49. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:26:49Z), 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/MXD781902765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645d2907d5d42fb3b2691160ae6aad5d90da202676a809fa7881d1bd37a3ec90. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/MXF361540007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dba535bb9d173436c692f7217dcee17f09eb77a704738e479b91c32eee5fa32. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MXF361540014.