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 0xa6bf877ae3103489e27183c7e4c495f1a0ec8956cd3b548f1250cb2174053a48. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a354328b-11ff-4d94-abc9-d7b85e6c4d2b.json and https://artists.proofprofile.net/proofs/artist/a354328b-11ff-4d94-abc9-d7b85e6c4d2b.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 0x28f5236ec9a9976ac39f006f4df0a7dd62719ff92268d714db52973889440016. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/KRA382160082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b91279fca103b4374baa0a1880b465a461c5f49bba3bc1f799c91abad3f546. 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/KRA382160084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78c1a8ee9df300019d74790263f86caa865a02d24548a6201b0be06268cb3e7. 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/KRA382160928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b676bd02b607c73456733c2122360a0d800a462f9cbda8a522af0391d483ce3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/KRA382264679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcede57e077a28ee88aeb76ab3c1561e81a0276289190865e6e12166380eca9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/KRA382264680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3276383d6c68f1fd348c49e475d382097d296be564d4be66756d1295659cfc86. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/KRA382264682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316ee9e7f468e06fd26c154707a46c1579ca116be4052178b89d3ce129c37d7c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:50Z), 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/KRA382264683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02d6656d163478ced3da5625c5ec605aa574737e481259db6fca0b0db8d2e95. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/KRA382205264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a4dc1d781f4a19dbd61262d2f87b505478b9c0df02224d9822036d9c245a3c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:00Z), 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/QZNCB2185349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89048a6bd2ae313155cff0e2878c17af5fa07367b7cef5fc3b64c1867dfcfec0. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:41:46Z), 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/QZNCB2185350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9576b27dcfe4da0d6db47ba116f748f656e13351a8302ffc543fdbd384b1ab57. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNCB2185351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1161f0b418dd25efd289dec21f0bb02c775fa5d3c86b2a1769f86e3fba2ea8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:35:10Z), 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/QZNCB2185352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf866a88292dd8eea8c4de8cb8cdebf45aae85813f7ac8b8a79ba1d64659fa948. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNCB2185353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699dac55dd9e8a73da70c7faec41edb703748bced1f44b4669d2ded58b3433a5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNCB2185355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7b74d6ad73bb708e2e4e71393a9c18ce067e994fcf2411faec97e43ca10171. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNCB2185356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca61f34e89746e84b6c464cb30dba4ccdf96aea7a35f479802ce534f5a16161. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNCB2185357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1b75af29743f7f4d1f85bf2801803bcd7dbd1b11538ec8518d85813474a681. 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/QZNCB2185358.