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 0x84bc3babee5610eaef92e494b6e4bab093d53d72dd2d9819c8d388e3964fb0b0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/946102aa-a69f-4e34-9d67-3fcc756762ee.json and https://artists.proofprofile.net/proofs/artist/946102aa-a69f-4e34-9d67-3fcc756762ee.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 0x333ca223ba79109135ac581a592520a5d6fdc76211fa63dfaf5129e20bf1e0a0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBFB92200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9fb5f946cd4a9f55f0c50aac87bf450556c1bd28848f8984c9702c7c963c3c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBFB92200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2770521efa86a581bcc208ea1f83120544a70652ace17d1581fe5536b38a6367. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GB8MX2300974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6323785ba175615f10a025d1c888b7f3c4b804294f4fed2401e73d0d912bbf5. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:18Z), 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/GB8MX2400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0520d8bb62bae7a1983c25f2c33f7d2136f56ef7e80f30f6194ee137e5b0f5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBFB92400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ec5310a9812672259824f3efb0440b6c7b2ee48fcc0c7bb2b3827607b3f10d. 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/GBFB92400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0520d8bb62bae7a1983c25f2c33f7d2136f56ef7e80f30f6194ee137e5b0f5. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBFB92400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea402d2c28d58f8415fff91c052b41f466a4e91bdb2b7811842e586ece958af. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBFB92500003.