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 0x7ed0335eb5216e4e3d4e29ee377f6757ed271ddbda7531c6be9c12c6dadfe387. 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/700e21c6-b46e-433b-b28c-2df31a4e3d41.json and https://artists.proofprofile.net/proofs/artist/700e21c6-b46e-433b-b28c-2df31a4e3d41.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 0x5d9a7c3351f9362b12735ffc95b2a988e6f62e9eeab34d0358ef8908406358cb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:37:27Z), 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/USV351373524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d54d4efaaec74d2c7a9aaf6179a673aa30853fee1fd3b484b518ed77d50cc4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USV351373527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb89b6f47730f42c6523ee57eccced1e3877fbfe01a703518a2b6e1765ced9c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USV351373529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223cab86e595ce8e1d1f76a535caaac5f2497e7b22f06ac8cbbdee7434fe7d93. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:53:05Z), 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/USV351373549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2420f9aa31c09e88fc1632e1a9534bc0aefc7b2c1eae8a59f581c6350e3bfbe1. 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/USV351373566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3447a2a6df7d0b31d2c2247468f13d5ef673adafbe4181324865dc7c53187be6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USV351373575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc506a8c65630212bec8af8bc0d1c1323a54e144c5f64292a89f2401d6ea9412c. 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/USV351373581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247b0703e3c010bed812f6624fb60a7028b13468623a1b90bdce412439b520a9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USV351373591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b63132079906858ef89391a011317f6f27687fdeec69ef98402a91a677d011f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USV351373599.
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