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 0x955f133b1192601d3e648810933af5ee203e1556a501fb71c325303b91ba2ebf. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf47f615-036e-476d-a484-f404157fcb03.json and https://artists.proofprofile.net/proofs/artist/cf47f615-036e-476d-a484-f404157fcb03.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 0x6b2c1215cc818d10021c5184a86b4cc9fb616cb2f87fde60c4f4d1c4c3cf51c1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6Q1941297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5291a9385eadfbe22cb9748a09d69e55505ca638fe7d4d63036084e95d3a57d0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN61964977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e845626c39de91b2eb5b6f00f93bfe28780486450740b2f76a334524af729d. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAHI2304581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59ded78d31c24c0a33f57fbe829851ac1ff8035f1bcabc87b647a7f77059901. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/TCAHI2304606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801de2fcf48b92f3f2f8d6df3b58307daa6d1f8aff0088d0253143a922ec3df6. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:54:18Z), 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/TCAHI2304614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc6250bb760e0025a5a908c8d856ae8f99396f8b9698e63cd3484fa7c6ac0bb. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:24:46Z), 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/TCAHI2304630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc457964a0bd56fb1d93ede4aa268be2aa1206a6c764544af048982d3ac6013. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/TCAHI2304641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad97e92c1c865a306e5e5bae00abd56798581d3decca294a18e931006688cc1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHI2304649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8921fe705880b421b847524698bc92d48ccc71f859908a687fa41d418b1564c8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCAHI2304656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32d534cbf49835ff70a5058741e519cbbc2b3231eae09063dbfdcedf6a84082. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:05:02Z), 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/TCAHI2304703.