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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387fb83507259cab257edded4334794cb5530a7346c0e75cf9a39b3dadd91d57. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eab1f794-f7bc-449d-954b-d2ce3e1f6b45.json and https://artists.proofprofile.net/proofs/artist/eab1f794-f7bc-449d-954b-d2ce3e1f6b45.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d0bae2cf5309cf1a375c9f2f3140f81f83d0f2d3fb2393e34515c3cc7dfd24. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DECY52400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38acd2c778ac49c1491fd77262bfd3d49a36536d300ba0c1ae153ecf928ae2a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DECY52400573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2db64a0d63e8e4c08fe69692c694d78f65deb074c5ecaf3f48df208f90b29ea. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DECY52400574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dd432d09febc7dbf8823bee052be24537f34344a5bd88a262ea3f26155d575. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/DEX262320020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00f1240e25d366f232f60f24a955b00a23662cbc3cd73f3c336ca3ca28654d0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DEX262320006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10b2a46828719fed9a6529c96f17758b531ce3e865b8cb7d1db0fb2651479c4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEX262320001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bad4148282facad485700dd486587a6e97e711e9eccf462c06d6aa41645224. 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/DEX262320011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e832ccf3767de19b10159f6fd6c01cf6ccfa1268d207dfd318521a9b5a5a95. 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/DEX262320002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0124ba3644c4230446ba16f2654be178f89a21e8031ca67acadf106a8119a03. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/DEX262320003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee3e7f13b429ac40b4a627d6df66348b0624b989699bf7fd176fc0f3f9d4f86. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEX262320013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9390623a5f4da961b59a3968de24307221c7a5dd8b3ea1dbeff1f1ce4df6020e. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/DEX262320004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eeb1b0d9902288e28ddd660f9cb9c1846290bd208875d9c062ee50d3ddeb72f. 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/DEX262320005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89a4f58b9115590d3d82cb3a69073b580671d039e9b2ca08af1f79ab49bb801. 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/DEX262320015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00f1240e25d366f232f60f24a955b00a23662cbc3cd73f3c336ca3ca28654d0. 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/DEX262320006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928d91ec270af45a4d0c5bc74ab41bfc8e6d8cf12fe1f208fd3c3f797c08fdf5. 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/DEX262320007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecded00ecfc5d5fd01176e9a3b581e64511cc22f975e95edcdeb792d30f49e52. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DEX262320008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428b8573464f903501e76d023d073aa783583a02ab36a913238d7038fd435403. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DEX262320018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb25145b9d1fd127f5fc241aefbe320469cd65453f0ad3a467102c78af6fd6d9. 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/DEX262320009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820430ef2d8d2ff81fdcf9b7cc4cd7a2d885db7056ee53a8bf45cc6626fe0b63. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEX262320019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa5f5311336683d52a71031f393a4fcbe0bfc8765928556c0c49193f00001a6. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEX262320010.