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 0xce6ebca10bc8cf602670dc6b931ad34a05de0125f1862d7958ed6701efabdde4. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53aaf989-1ebc-4b6b-9858-17076a3b2423.json and https://artists.proofprofile.net/proofs/artist/53aaf989-1ebc-4b6b-9858-17076a3b2423.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 0xb8fc5a87c6afbc791b5e9b5ddd5d8f8e7fcebd1172cdbc6723dd6e92b659975b. 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/TCACY1775102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cc25f86c5015813ffe363a589020bbda8c06e8c27558eea3f3bf3edd095c7f. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:13Z), 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/TCAEE1970734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27a511c8cb2e311f53b40a104e07e31cc62f76792be7816a23a203757ab6702. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:13Z), 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/TCAHF2302226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8339517695c3ceb2c1078d4d7071140ebddc1a25c1f9dd875ae83371a1c569b. 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/TCAHF2314225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7e45b55ea6aecc815fabac9a7b325d79796bc55a6f50fff9464db12f447fb9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAIG2466967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95459065e11127510e399971fd2625658db1d919caa4c55f3cd4d04db006db59. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:36:16Z), 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/TCAJK2583136.