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 0xa43e6758651ab85a3b3019af1b3066b2e17ac5ff1b5c2ff2d9c7fe916dfcac0a. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e626b9fd-27b5-4c8f-a0bb-ba788886d1fa.json and https://artists.proofprofile.net/proofs/artist/e626b9fd-27b5-4c8f-a0bb-ba788886d1fa.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 0xccae2e51c5d4f1e26e539d2c9a4646ec3705b53dc2f121c740d0fd2ea9e44476. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:42:05Z), 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/TCAHZ2482160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4e57d1ac8c2e5c1113f40cb59cfc07a8959fa7c414dc1c5f89dc837c0c6467. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:35Z), 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/TCAHZ2482163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6926585e91d41995fa2d8243a30f52f1d665ed0221cf195b824e91cfdbe052ae. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAHZ2482166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585e083859c821f7fb5fe61319ea8f1a90282290e8bd2c94ed520884ee7c5212. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:22Z), 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/TCAJQ2502914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2df75cd89e6131cae07d06a60329b7d9031aa9c6bdff2a06d944c4c21fe041. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJP2502922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dbea23334476f8b8686e9458adfd85e92e5cc0f15e91f039c98f3a6f61b5f4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:21:17Z), 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/TCAJP2502941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5fcad9edc4482f6efaa23aa077ab9bb78fb61a6623fb102d72576940180abc. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:43:23Z), 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/TCAJP2502960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db5ca406073a5cdf41f2a3ebbcf792d9cc76ac18550c1dcd3cf5c6f2f7cb7c8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJP2502978.