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 0xc7b4497a7c24078e3af64eb8ff5bc6a69eba365b2136723d21f9bcef7b7839d8. 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/2e860e71-585f-45c1-824a-cd58c4e2e66e.json and https://artists.proofprofile.net/proofs/artist/2e860e71-585f-45c1-824a-cd58c4e2e66e.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 0x10b3ece92445e6d64f9cc59065e30d6617a2e06511d2bfa1dc49450c0de54a09. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR96X2094236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3634daa064a6d6e6b3701c4d1f2fa6d156c1d019e4e8aa464822faec7ca042a. 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/FR96X2094237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48add4eb78cd54195b10c50eeb10e0919f84915d2238db33e767069ed0f8e4d. 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/TCAFP2179883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeb3d8bc6fd33b7679c5d9eb8044221d0f52076e1a7a09116f277cc26304680. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR9W12210868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089171db64072766c4ab9df7d3319b1680484fdcdd5366f1908a49f67a69e61f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9W12210860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d43520e1d436400b7db0fd17277fdc2f09040220a3b0eda84bce6090d6892fd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12210861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a40140d533f20a1cfb536f7836ef8b7efd455dcdedeaaf4e35b415caee515bf. 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/FR9W12210867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2962b381f9c47a435a77d7e4269be7808e531c9c7b8f042544d0b736685ddd1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12120933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d54a625b921da2458f53cdfcd05eb810086a62ddc7c1d361b2681d8af197d23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9W12136320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3bba69391ca0107b2f634005ec8b29711efbc033919ca203199b6ed7564bbc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12210863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1121d3f3cc44cfcb7a220218525b81d06f14786e94b9a643ea6412133288bd5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR9W12210869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fa85db93cc2895db0af5e29c414f742872d7fc01651fb02917cfd8715b704d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12210864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2a3fd61aabfe9d7400c79b4197240c20946c29d6b036950fa4162c3b8f9f84. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W12210870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107853a8457f013100aca49ccb2edb6833158428ae26c972d4b994d0ba7b5aac. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR9W12210866.
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 0xbcdf6efe4a09bdc468136413450a494be6ba0336964f93e497fa5ee2ce4f1e29. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FR1A92201464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4184197982f1cae5940b625d34f145614f96b95ddf46f928f11db8d17e4061. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR9W12210862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bea73ad0b2912624dedf22e5546f3046b37880936689c228ae35029edbd9ed. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR9W12210871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97f5cb46855f1f3d15a97be69f2cd82b0d44bafa27599eaeec10cdad1f7ff1f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FR9W12210865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d78412519ad7a51059a0931830d69228c29780001b7b6e1a7cd030a8d46eb5. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/FR9W12210872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36499b37efc893cba9868bfc0366c4f0a05ed9b759c02da75e38d44041884b8. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FR9W12044325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d58ceced8db75444d865191400d5e47a162545bad5d35721a8e0e966858b4c5. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FR9W12210873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a95ffe70d7ecac6b2d22e692550c6ac0729732d3b1982086e1e34b5747da051. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR9W12366108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56a9726d4c361d3b358b4b0b5a406d55223039a16634678a9f37f599cb80b07. 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/FR9W12411600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f266e1ec8b37651d09e4f366e2097ab4aefc08902083bd3471a856b3e0a0221. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/FR9W12457694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f768b1d31eaba8fd4e34b21cbb9e207be82289e1027e41d5010a4978d3773e1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12463098.