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 0x70a03069d2009192b7c6f2110dff7ba717e2968216e69ca94fd7426024ee02d0. 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/cc3cef28-c1be-4aeb-a912-5313eceb5aed.json and https://artists.proofprofile.net/proofs/artist/cc3cef28-c1be-4aeb-a912-5313eceb5aed.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 0x24ea601c58ed4075145e5779d47903e65d3dcfe4a8fd90c93bd9332fb79fec1f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/MX4781500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba8b6d38a5b6ccdf7575027cec6caac557b839cecbeeee9e271adcbc613d2a1. 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/ES71G1829852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774424415a2b18cfa5155fb6a862904a92a38337736bc14f0db42434fe979085. 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/MXD781803625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba8b6d38a5b6ccdf7575027cec6caac557b839cecbeeee9e271adcbc613d2a1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G1829852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb921e27cf4778ea7c2f4979ef2db61e21b55ca7ee8e5af587530f3983681179e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/MXD781805562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7337c25ec397c680732d36693442d6b1b34fc62804b0a8dd3616fa1dd96b000b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/MXD781805563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64758fd3852b589df04a4e1b7a0f0a96da1771998db67744f17f3dc5195e1226. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/MXD781805564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8cd00601cafcd0edc17803e3fc2182e7fae8f0e78a61be99b96737950cd758. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/MXD781804645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd1c026e8ca013d0e4a6ac8e2caaff19e97d9f3bb3bcfcd996ee2f0f8b2ecb5. 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/MXD781805567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928def616135629185cae15e6d6834c37f7a1fcc87e7d11b63fa4436106c0990. 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/MXD781805568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef438b14ea69c942e91c407f3f4955a0feef3828663aafbdc7373fa5ab6346b8. 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/MXD781805569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f52be28b59af8fc97a4acd899fa0d0dae0edfb6c9ab1e0d5e1692d22966944. 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/MXD781805570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c20304017e1b40a16d65f98023531d4d52b31a23c2a821c10fd8a198c970d5. 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/MXD781805571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5157d5c8c7492dc2befcd15430ab397dc17cff0489a90ca4c37f63ed69ca4cc7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXD781802466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba8b6d38a5b6ccdf7575027cec6caac557b839cecbeeee9e271adcbc613d2a1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES71G1829852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774424415a2b18cfa5155fb6a862904a92a38337736bc14f0db42434fe979085. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXD781803625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5157d5c8c7492dc2befcd15430ab397dc17cff0489a90ca4c37f63ed69ca4cc7. 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/MXD781802466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d46902b114d45572d4bb5a74bb3af4bfdc9f46bbb8f36e207dd0d83b8805d27. 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/MXD781903987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b503fff1b8062c2091322d7b5cc57103d06e9b75fec3177956b957a258eab1. 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/MXD782000889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5148552c5ffb109d282ce1dad0f0895ca894f78e40180469c05ef7032306bfbd. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/MXD782102605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3313d2f65d7f3384576aaec6941637e444f7d6de04711fb1534c984117701619. 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/MXD782300573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2027d0f82e429996e2c82a33765e261168a105f4cd8cd3e0e52cfb0488eb3c9c. 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/MXD782300574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b33701fed83c47e5ea29948d6556588d90be168bf5e95e38e20ed82b029ae7d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXD782300576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfada7f1d54f3598907d5d8ba0ff66de93ef7cc1cd5e2a8609537305050ccfaa. 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/MXD782301346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3313d2f65d7f3384576aaec6941637e444f7d6de04711fb1534c984117701619. 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/MXD782300573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfada7f1d54f3598907d5d8ba0ff66de93ef7cc1cd5e2a8609537305050ccfaa. 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/MXD782301346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a81b10c799bee1471ca5dc3635546537d585bf7c1d03377068cca9df411912a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/MXD782300575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2027d0f82e429996e2c82a33765e261168a105f4cd8cd3e0e52cfb0488eb3c9c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/MXD782300574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b33701fed83c47e5ea29948d6556588d90be168bf5e95e38e20ed82b029ae7d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXD782300576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf5ac45d5ab0ada7d89a87f0732b750fe5f4456a6d84ae393123c178b13b50c. 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/MXD782301595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91cf4a83702116e307332b773b9e89201f8afbc9fc6bacf7ea51ce798a8523f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/MXD782300572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966f5d89e7e96f7158db5b99e7fa32382d97e7a76dbc032424c68634780ca5d9. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/MXD782301594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837e2c0b6485a4bd8255a10f68a04b40358f962144a695869a66e5e93b1a8be8. 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/MXD782301593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62b9210214ae2e59ff263c3bb8cdf01354b201f4d378a13c6db32cd5fb5335b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/MXD782301596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b33701fed83c47e5ea29948d6556588d90be168bf5e95e38e20ed82b029ae7d. 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/MXD782300576.