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 0xdc5fc3da9697168039e3e3cf1807e1ef06dd9159c491eec767a31fdac25bce09. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f791110-157b-450d-a43e-7137074c4632.json and https://artists.proofprofile.net/proofs/artist/5f791110-157b-450d-a43e-7137074c4632.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 0x0a307c92f9dfa6f59abf1aed6e96c6984540cb709d1ad8cad7c57f71c18ae08f. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/QZTAY2477467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb7853a6002c7278f73adbc9713a3f7fa47783146f7925e0ba53954353e352a. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:24:23Z), 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/QZTAY2477468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232dcfa04dc0f43a46b2a1305ca5dac8288b8a07fd18b77a52320cdfd8d4efb4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTAY2477469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16d517fba14132cb27eb43ceeaa7e48eb63fdd38c8335ba2e529143f3178ca4. 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/QZTAY2477470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548dca4de1e3ab6fb445ed5045e89c4d6335503b025aaa6cdf213632b047377f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAY2477471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0e6019f52c29d9c633da758a5223d6dfab3a76752a04a4759e2f4d6dfcb956. 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/QZTAY2477472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51207a5e6103ecd17ed89dbeb5e45f6ce9d426a7c19725a13d0ccc5544845a8. 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/QZZ7S2433905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7038675d4a96f08596098dffeeea729ddb103f89ba6b72f97f60fc87ad7b8329. 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/QT3F32419874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ce9e6527f038eea55fb256c4ecb6103381c30b1ba6eefb374f517180ca1143. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT3F32419863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1730449fb546ecf8b7f2fe30311327e0c1e92169c0319cc90049474ee357ac9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:38Z), 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/QT3F32419970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc388487d4dcdea8252d177ea9e680c010aacc7cec312425e7a7b0335a12fb2b. 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/QT3F32419858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29d92d9211d2ead82da56bb7b57471a061c9936ab189c146d68ee1303ed9b45. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QT3F32419839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1e8f20a5545bc993d2c1770e6d54576d67694018338c81b6963ab9e33526cd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3F32419868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141a8fe6b55463f78dc10ac25fa0fabaf2e7ded13ae05cc58dceace962055651. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:09:42Z), 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/QT3F32419966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab41b91d454f83c55170eb22e7db2fb2c4dc6f16521c9d59d6e341e051d3195. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QT3F32473733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf330294a740fe713a2244709b9157f03c5c2124e1e87f79e0702cca6bb716867. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3F32473813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919671fe5e68a03c943962d55f6b392fad2d3c2ac01b8ce3ae389d00a03d49de. 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/QT3F32471012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdd6cfc4ba9091677c693a33d05bc2f9430fbcd0512c600e8ee178bb83db572. 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/QT3F32471014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b338851b90bee703d78bad3b6c60c6691e6aa614aece0252638855fcb919c7. 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/QT3F32473805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde69c0c65368e4d6f1023c8c0457a5cf0e9b00546ef01246227c544e0fed6e25. 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/QT3F32471009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce2f6d4cff60e4b6b79987429a5d065148e028ab54bf4e540277bce150f3bd9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QT3F32472400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2850d5a41f064d3154e1f396f9c596d56497c86a4880765a79cf94ec4d3b345e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3F32473809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5c9f52d8fbc3bb3e846e9e32fb09cc1541ece8101fb051c82329c827db686f. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QT3F32471008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e5ede00508cb9d5c54d9ffc8b823b1a804c640633f608931fb93a54882c237. 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/QT3F32473803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa9990521251cc963c641b294e41c7a54c49210502615235ec2199ba853c97a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3F32471015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3882d9cd6786c3591a5bafc103597668702fdd3aa87dfdf13b0ab29bef4b0f39. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QT3F32473807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3983f67f51c14540952c666fc39db85da9c446622c0ef6a27e1bad5b1b0fa71. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QT3F32471011.