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 0x340b3a639810aacd06413d8753eac5321ff5eb6c3c909f246c6b6c5d03f1e45b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b81b0daa-4a47-4703-b4ee-c0579912b022.json and https://artists.proofprofile.net/proofs/artist/b81b0daa-4a47-4703-b4ee-c0579912b022.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 0xf1ca53903e2de5f5066be675712162f61c3f24ab45f4dfc301415a79179ec8ef. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6F2340346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d6b0b31a3468105cfe67e028bbc4d0c1a207570471ced9800571f5993ea76f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:55:30Z), 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/QZTBE2372496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fcc8735e2ecf8a4aed6845ef6ea002ac5813992d3014d3a1a4baa1be427ca1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEM2446850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3c78f5b8ce7b147c808c5e7f34d48c1a5f3b5d8ee5490b06cff7b73ee5d5f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZWFV2478886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53452714dd3783dbda70cc548914bfcab04860b855c623fc22ea38183dd2d046. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:42:31Z), 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/QZFZ42517028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575bce606192be649682f5ace5944e4112fc87eaab241d9767a042ae1d9525d3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6H2578236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bb247a56822c8d169f25872ec47155486f7719ec4e6eb6a42843c618500ed0. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZK6H2578239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dde23e67cbbcb0ecb6e936b10729a0f1d28912f2b16ac69283dd9ca28048ef2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:09:04Z), 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/QZTB82555584.