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 0x3e32a1f49d0fbc86980f4d1219b13ddf50d6fd367de3e43e52d60b47080031ec. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a552e78f-41df-47cd-abcb-bdd1e9d2895f.json and https://artists.proofprofile.net/proofs/artist/a552e78f-41df-47cd-abcb-bdd1e9d2895f.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 0x0d09441ca300f24cd7299bd910011abccee5062db241d6dcc8831fb4635ad8c3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZDQH2423545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f149eca0aceae92e3773e7558f6a7e8113c54533399a131287d9254e1483765. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:21:18Z), 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/QZDQH2423547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ab241a7499462a18c4d339e16171f7615a5cb229a285b4ea05d329c856b0a2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDQH2443955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb35a034d494848516042f5f2c14e8e67be127d9b8b9592c034c69321c6299e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDQH2444206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8004ff583abeb69c488b1b9ef0b14b9b1f8221c8e5de07307c0f1f4b7a8f6741. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:04Z), 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/QZDQH2444203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1764f875ac622711a1fdf54db49816ca59e5dd9df861dfa2406c543b583093e8. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:26:24Z), 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/QZDQH2501988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b7724c0e70ae6a0a746fcf6dbbf26218717dd807e88788cb3f81f527ebd8dc. 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/QZDQH2501985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd54bd0bd843dd04d82ed9d11027f930b0a8438bbb47efa79f38d2210400cead. 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/QZDQH2501977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce2aedafb987248ffd01c87ca72acf856c7603fdc7f487dd5528c074e944df9. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZDQH2501983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7d36bed9e6496a060fada960057d962214807f66006851bce4402ee7007afb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDQH2501987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4746ad58a0feb5538fdb794bc424a8e9dbeb373513300076c54d18d5c6236065. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:55Z), 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/QZDQH2501976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc3c4e3213f8ad226f67ed7a92598583957fb9cd638bca349b525abc48dd1d5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDQH2501989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056f78a5d869c151c361efece3f7c55d1d2203fb5d4d0b84fa6ee42c8fb814f1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDQH2501984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cc7b73ba4986d1455bc3892f303c06b079b98217a441c42f4d3679365bd0a4. 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/QZDQH2501986.