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 0xe29d1651e7bf21bb3c7292779e7e2d014ffd99e00f3ede768fc149ef192cf1a9. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c2419c6-abf0-4d17-b04d-7dd08bba1a72.json and https://artists.proofprofile.net/proofs/artist/1c2419c6-abf0-4d17-b04d-7dd08bba1a72.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 0x419c5e1138bf8331a6a0c2cbff8619b5a28ed09d8c5f7c9a806ed50f38d068c1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CAGOO2513299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209f88a5afa8118a92dc3ab557164af17771616b6969d0001451f74d152775df. 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/CAGOO2513294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d09311b0a20ebd07111810ec61f3c9a1959e518ee029bde9e385a171b19664. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/CAGOO2513922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ec08f4949b3a36a99a92ae2c55f969a52fcb8ccb4c634ce5ba60146914bc78. 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/CAGOO2513929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8fa8d288b3743b6e34ee00c558d223fc63d62ee3a2ba4f49e22740984836d0. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/CAGOO2513287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f242869ae9e384cc4ec3318d3faad4eb556df8b36b7ef4960d53197362b6c6. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/CAGOO2513928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f4112b1cb48b5837c9fd9941f79c5714888ce94c0d215ab1b75a5d42983c97. 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/CAGOO2513268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffac14213804416b9b014a9df8a1eab31c54686d50d4e6c8cdb1754296276a6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAGOO2513927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a4508a39b623e7e94ab73fc970c83e4f3839d768c02787ac616eee7c12ab45. 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/CAGOO2513933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88ff29bf2fdd908fb8ce08a800e78a30f7c2669773463a38321d852581500e5. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CAGOO2513923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b0c5b5491e3143bf9d11fa372c203561c7c5393adf03d9462e57cb725f1b42. 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/CAGOO2513283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b41f24ac93178b70eb1d601540dc8d6d684a3487dc6b8d8c8a83ffafb1878e. 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/CAGOO2513920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808189bb4a6fba9c3468d6e6af29e21ec2bdfb9c1da941baf3cc3086c37a58f9. 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/CAGOO2513286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61933904b4a1d0a85ce7e4556d22e4b0dd81501267df0684d7c0eb35cea2287a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CAGOO2516185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b5973e5873d6d900b639bd40cc1599f4e4e17f6823224d9cf029803424425e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAGOO2516187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5b46c3fff94f827e32a652e51ea9fe82c95993ab4ef19c9e4652b36b18b11e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/CAGOO2516186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2423c00876664ee43b6e4a32157ceea62e6e4cd17ba50a4e2a8d8474414cb29f. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CAGOO2516183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa7260caf780167e86e5bb4abf3981457bbf38409ef3080e5077f6511b02860. 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/CAGOO2568173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707d880cd596aa620eb4f2bb686eb380c1e74dab36bb79a5d8c68bde1c83bc4f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAGOO2576607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0afd00d9099c1235c9e7d50ca3dae8da5bc1da4cac0166e0b6d6b886b8a0e3. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/CAGOO2576624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4738147f439bde76d3693249748be1b83524798460000ec09a565976a8a2f283. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAGOO2576463.