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 0xa635689317978704b743461db60b92ae47aec4442b0a2dfdf6c4116d6f132e3c. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b4de48f-32cd-412e-a715-7baefb32302d.json and https://artists.proofprofile.net/proofs/artist/0b4de48f-32cd-412e-a715-7baefb32302d.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 0x6ca93daed9e3125fefd2f4d25936ce8a086e9fb6171482c7867933c32069922b. 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/QM42K2571159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc15bb691f83bbd439d62fbc0483bbffca96d6439a411c132b3e4a1e86ee852. 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/QZMHP2508078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395f75fd0b73759634ef8023db6756c0a5d741987b8abe9798080dbc5f2ed64c. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZMHK2512662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a5a7d8a9d2b966a93b4bea07901b680ba994ac59768281e2e21e192b19ffaa. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZS642595684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fceb213788df261b57154645cf48d8169e79215eeec0eb571e575f85ec9409. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:16Z), 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/QZS632521649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374da0c69bf188a37897f2c2c2dd447a92c625cf632bb7163d492f96cabf9be6. 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/QZS632505926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a70ec2885a183605b3b91e88ee93ad1de1e88ae321cd72ddc1e07986ac9be07. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:15:00Z), 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/QM42K2541402.