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 0x9e265499df5890956c6aacba068451ae113213612e42bf2610e67d0abb6cb792. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3133b2f4-c894-46c0-bce0-8ac5a9deeb37.json and https://artists.proofprofile.net/proofs/artist/3133b2f4-c894-46c0-bce0-8ac5a9deeb37.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 0xb654eb1a7700179ec47432deed7ff4b279c39d13110ec1af37a22bbcb4edb830. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTPX2359367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc06b24e62146a8610b382c3fd89b98d3446d634c1a9e9c0520237338cad3c3a. 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/QZTPX2359371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf03576e41a3bc46658be6fb6c220c8142e05c519815085ee4905f5060ce42c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTPX2359372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c3216dc00e60f1fb709b9c3d70a970f3f669cb34c5d4e290a8e65b930c2b6e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTPX2359374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24544db5c4b7eae762125a2b558692f211d4594dd1ef16e4bc318fcfcd1bb47d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTPX2355936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c853b1d4a2dbbdb1b1b22c6893789cbb34ef88d6328fba3bcc2d8af355f093. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTPX2355938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa485c6a2b17ea7932a2f4d8e91f231f4e11deee0e719aae77330066d9f991f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTPX2355939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9075dcb5730aec467e5a1e865a3c3ab5ef91e6c6968acfb970a7d9523cd4a985. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:05:17Z), 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/QZTPX2355940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e154ac404ffe09b0deafa961266fdc1a3abfb17e8168d15a7ccd83abd44163. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTPX2355941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8533fe4848cc3323636cebe10c1ef4d2fc44ad195298b8db688e7f40f6a232f7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTVM2309687.