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 0x7b3385ea974d778338f3456798c2b4b446dc0684b9439bceacf9605c5b92e089. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9434a08-f160-470b-b78e-ac6fd7c9175c.json and https://artists.proofprofile.net/proofs/artist/f9434a08-f160-470b-b78e-ac6fd7c9175c.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 0xfe0d56cae78ac199d3ebef68bfc18606a45329274149cd180643f1ffcc377020. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRX452307072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716cfabc23a94f7aaaddfed681da2f23443ad94816219e01177f0cb3113ce5c1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DGA052344155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42b7858efe4e285a3b7f4567cc4c3e9b2aabcb2ff94060e9820d54b3f219b94. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR59R2368180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09560144770d54c4f1b153933cfe72bd1dfbbbaca935fbb9efbbdd26fa2041a6. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR59R2368185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b968005252f170501fa37c3304e7035839e5fedbd4d40d34c2fddadde026a46. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR59R2368198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ca59be2d8a92683108000f85160081199a1c7c05b507ff56c7f2b027a61e72. 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/FRX762365239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d3eb1192be4ccd8fd09a7689e87a67fb380496d9974cd367f5a3a7c1fae250. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:03:26Z), 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/FR96X2428113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827fda3d16d383666b3ccc5280934003ad742da0a26f4dc32c039e4b24f737af. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0M2465029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5873ea6c4ec43f23e38f9292f4e81be2c0c4ae7c594985e74158d691323aebdd. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:13:28Z), 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/DGA0M2465032.