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 0x4bfdf2a5f17092339553f8d79e68b770265cb4d097568563bcf90506d5518896. 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/da948d96-4add-4b8e-a7a9-5d1f33b74d95.json and https://artists.proofprofile.net/proofs/artist/da948d96-4add-4b8e-a7a9-5d1f33b74d95.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 0x34bb54a620feb34dbff3f15da4e085c587d69dc05aa2e45b636774c560948e2a. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:20:32Z), 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/USX9P0716389.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28256d121ddb7ec47d8961f6b3e394555084232172edab876c74e1bc84285273. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USX9P0716394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3beae6dddbfa53887d2dfbae3e771af8b40c9d3bf166b5b7881d9bd1ac30e8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USX9P0716400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb4745fae542af2947c911dee43134e56d0ea273bba909f5eb00bad9e7144f4. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:22:12Z), 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/USX9P0716403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd199b5dfafcb411c28b5f066e225aef4ed6c19369ec4f6ff532046c5a8d857. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:24Z), 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/USHM21050955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759e9ddd827beda4f77943fe22dab3d9ad72b35c6bf973ae806afeaced62afe2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:55:22Z), 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/USHM21050962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc040032b68c1f60744b3449f6622aa7a2ad1466f6e612ad61597908b9e00062e. 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/USHM81324072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257becc305cf73a1872fb869dcf67fc911145d7bec730a2e8bd33236be5ed048. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USDY42420840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82e507bfb37e028349131e99a9e45fad8589b7b27287c7c2b03ad3ac7961d3b. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/USHM22464397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f003778c53f2b6e34d672751d984e3f2f2741b612a114727ff006c89392f7f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM22464401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867619d471c6594637f75612674d041544f07f9ed065b500cfe841107a940243. 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/USHM22464404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fe518219b934212db7dabcc94a56d729282b2fecb6026aea72626111c9c49a. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/USCGJ2542859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01959834bd5678738405eed99d093b59726f7b30ee8015d3f5fff0e96710aafb. 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/USCGJ2542863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541eac3956ce05448432df2eec241794a981ab06f728dfecba58c764023035a4. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:23:14Z), 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/USCGJ2542864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33abaab4dafc81914a130e768a4abb0b15831724184bc261be2284acf8da15d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:42Z), 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/USCGJ2542865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeb8e8db74b409ece1f2e6b008203da1462baa8dfe5c4dc79cb3372373e8c4d. 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/USCGJ2542866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe4d5f6476740c37b07a8921802cc9e827843166e24ce6741c3825e84c1e822. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/USCGJ2542867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282fecba756d10ac4a97a6c0da4673310ac95ecde3655ade766f4d2bb92daf58. 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/USCGJ2542868.