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 0xeafa66a940f183c050902d1a0e9eba4ae6d2003ccc4333c0327967233b76a99d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe7ecc3d-5f66-4a2e-a591-21936f8f45c8.json and https://artists.proofprofile.net/proofs/artist/fe7ecc3d-5f66-4a2e-a591-21936f8f45c8.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 0xd4b1d93105163016537717b249088ddaccada99ca4c68f207c57d14ceb751eed. 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/USJ3V2071905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdbba90116840f92c8c396d345c26f4591766c55cd6f6815fbd729940caf2b6. 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/USJ3V2071906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ca693ecb4570d12525904ac3c85f2d94482b4cb6972369b6f205746be2748d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:46:40Z), 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/USJ3V2171359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b8eb89097ea59054eb8a88aebcbb4ee6b2d0a93a00d264a655e27c44db657e. 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/QZDA52373666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bcc9561204f9e5a3c5656f8d0b3df93161eba933add386f8e99e4caf9cf3eb. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:05:06Z), 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/QZDA72384660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bcc9561204f9e5a3c5656f8d0b3df93161eba933add386f8e99e4caf9cf3eb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDA72384660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2630f2df7c280d5d8afe1b6b153781d1ba9fec740088c5540f0c25771c95038a. 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/QZHN42321213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63efeb4a21d8605a4eb5b46f799d36b842eb32d44be02ed30732be950ee16710. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZFZ32346886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e195c17c118f4c94c8657d50a55d152888270e066b9846d366de9ae63587108. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:35:53Z), 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/QZFZ72384089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1cf8cc5f0032f7cdedc79aa11902030825e20660b29b100ca6f18239484c29. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:44Z), 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/QZES62340817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ab04741e90db5c54032dd0dc90af89be7f86aa67d5eb4da77422d1d6af4751. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZHN52379584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa00f1a11cf40a0708314c3bf831df11a8ebd0a43702e225add6ec0120755667. 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/QZTB72327769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1e8a637ee7837034c28cacd376ead16fe8be488701f2cbe88cef5eea2a29f4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6Q2477524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3530306409fb31b4d0b765243f6f15006e14b04de8a350a9548581d724c06e. 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/QZK6F2459279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfd183f16c96e03155c0678e7aa6388c05b5eee6a91f4f9924334d269f81cba. 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/QT3F42428412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51a9d1e61b32d7364ea84ed204719816db556ec5f6d494f88e45cdc76ff0b1c. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZDA82532700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2da974f49f03c58eb67c9fbe8a5323094a99399e5dc34e94d978b66d4dc153. 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/QZES92562129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf9ad9b6531fd6f8d64c747947b1c6f449570644b02a8accfc9c6f490b0c269. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:37Z), 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/QZK6J2598700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e645e1aa259ce90f63a3617a6808b72506888518a5b6ce4513d3227a9efc77. 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/QZTAT2521426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524e1271c1ff9ecbf8a94a9290603fabdce1dcd6d64a7e07b43dd5ef8359215e. 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/QZTBF2594787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cc6be737d123b30b651b74e8657921836b6b1d38acb1219b533849545cee84. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZ7U2560598.