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 0x7af6ccdc94aa722b24c604df91664e345929a36b4bec1eaeeea1e8c93e9e9a2f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edd900c6-1ffa-4fd7-846e-35a0be96ba2a.json and https://artists.proofprofile.net/proofs/artist/edd900c6-1ffa-4fd7-846e-35a0be96ba2a.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 0x71acadd768539a863b0f6352e43a4605b44b0a496f0389881bbb938398e743be. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZFYY2249883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6497064e4e90582c8c30183c70341937d253fb224bd1c776e1001a44b1011039. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZFZ22245574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ca6583844ae0cc4706cc8adf761ef9f44040200d299d321eea97d8d52cdb42. 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/DEL162230302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfbf3795dfbe3fc7d39147c7bd06a4c969537c21efcdcaba9cb687641426d22. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/UKR6V2212676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4a5812c767cb39d26cc0af24eb3c43044ac999e326d7099d8ef6f5b2bdfddb. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEL162330701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6c122ea774d7ff14e1b94e9252adb1f0a35c7bc12a9a6086cefe149500c448. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/AUKDT2300571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae98045f041fb4170e7c7cbf2462098f8e7733934068b63a1ad3a8af1282848. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZTAZ2366087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5270bae460113a20a39feea3a3ee853d93caac3bbf5ebf467ca33f88eb2363. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:31:58Z), 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/AUKDT2300638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658aea3d3feb90f5c219c3850c9c736598c489825536fd434df8ca23fe213b14. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:05:37Z), 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/AUKDT2300697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a433127011e3f335d2c3171d376f386a1f32edd00276883f0efa684407fbd47. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AUKDT2300812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc52fdc0cdabc61efd365affb736fe825b9af7607413abd9ba04edb3a117f22. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEL162430201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4eaa52ebace2e2d111c4b6fef083ff55eb260c40da4c94d088323164ee622ae. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZES82440044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f979716f076d100aea909af101d62cddb3de1ccccb3d98bb31908fb66b3eb79. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNC2422808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565c5c2f694e0be565cbfbd2324224114843fee6aaf584e394b55c066e94f030. 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/AUKDT2400893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a9c05060dd60106c359b1a56f6e75b44d91d42b95782f18e0d7ac835409f5f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:06:59Z), 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/AUKDT2401216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf533aa408f1ffbb88c10addaed93c2f84460f22d023cbca40209a670da7fe3df. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUKDT2401280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d19ca6e9a1835346583615f747a7fdf33d64bae8cd4add9b68eab8569a718a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:18Z), 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/AUKDT2401497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ab9c377b7666e03ffbbed0ac1c4e5e660b083865a7ddd745ce2df7a9073784. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/AUKDT2401886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b6d25947336225ffc0e5e345e5826844d789b99f097eb19fc8bd74a6424059. 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/QZFYY2558577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82346a35a3fe3cfa7d40276dd631beda1ba3cbaaa2b37fe343b415cf745d0a3. 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/QZFZ42599635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ace3474c5dc0517112d0de750355e173131131773b61d0ff638e17ce7426391. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:24Z), 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/QZFZ62501801.