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 0xc5f1b0acac7b6b0690dcbd6c45b24aa1d683cb760ccdc7a7955cae8d3f8aace5. 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/bbfc06a6-e23d-485c-8624-96f029442fc4.json and https://artists.proofprofile.net/proofs/artist/bbfc06a6-e23d-485c-8624-96f029442fc4.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 0xa45ad083c5c8137be7ffdd052f62e4c3a0bbaf4635a9e562feee580378e758a8. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/US3DF2109356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0146b74d8959193c68bcaecc6af20466db42ee7af3c70081e1e6db7c488db6d5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/US3DF2121799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2a94f6c280cffcd64134bd4d29ed1da3002304cb9e0703e6450ff2e66ee6c2. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FR9Z62100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c762ccace8c1c056ed18fe48d04ab4e3fb4a0e4a1e5dae774424004ba8cfcb. 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/US3DF2171088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9623df3a453f4495dbee8faec0f03a8f475be999cf7e6822773c743566a877bc. 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/US3DF2170657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c74dc24954b16997aa395a031abf01cc642f17a46293afa38c2753d93fb3e8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEQ022280086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7eff55fe031e6cc21f271d4e66e794f20b3f6c8aea1ac30f7a98d94c224e4a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/US3DF2245240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13df1dfe8f49097f1bc57e5137f07d65bc7420b44ac4331941c673fe212ae74. 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/US3DF2248342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2d7a29de439f3ca25a90300fa975051359440514c7ed64f6a121a01a663814. 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/DEQ022290993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db65e60bedefdb76ee0c6dbba287fb1013b99c5d349995192191099a0bb0e74. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US3DF2257148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e1f4e07e060c1e752b8ea34ece264606d82a7eaeb4660cbdce49b5229960ab. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/US3DF2257150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dd69645c8c8b0cf8c940a325062189ddef4b4fbfe54d5975f0f58f2f0ea8ce. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US3DF2257155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f0b41cd0542b6a22e5c246319a30773ad3fdf2e9a13ce8e4d35f4122598471. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/US3DF2257153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5613524635c30b1b1e1fbb3cb453cb8bf8d5d988080a13a3d46d918f021a9d1. 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/USANG2227216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc7a04596bf80b7c4d8c745e2c1372b2b73820a2780a7ba62d87fabac1646dc. 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/USANG2290975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8c95a3478b08b017dd4af86a6414063f11968f3738be6ce86dae23faf027f6. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/USANG2290977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02d7aa31cd27c4c1737d5e05180c233d48bccfcbeffe8181c0a2baee953aa92. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USANG2290978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc7a04596bf80b7c4d8c745e2c1372b2b73820a2780a7ba62d87fabac1646dc. 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/USANG2290975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfa7f23e3c200fb12e2d1ab728f231cdef4b8d823c9017d3454589e54e7a3f9. 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/QM3DF2257935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e52f43a624f91c64755bc37abb4b15a8ca243ee39d491d6ff33a76424c0403e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QM3DF2257942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbd1d10cc1d4557c8dbec448425ad03eb494754e27bf616668f31f39ee21bb9. 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/QM3DF2257931.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcbf624dc5b070f99f6681cf15df7a0c0d65c480d6ccfb1ad403d7fadbb4276. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QMANG2258301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5379ee7de666958d0019ec2e7b438f0c5cf53754f1309c59661109af47d065. 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/QMANG2258307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cef99b23d0a2cc2426a498587820f17ae04c58347193560ee2107632ed2e74f. 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/QMANG2258310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad145ed7a22c35ae9c998f95cfa82967f22619f6ba470a00c4fba73bbb6daf3. 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/QMANG2258311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ee80313ccf1608f675b22b4671aaee93b2c09576efe880e9596ae97967262d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US3DF2415920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade49ee4da6486142fc043245fb67dbebba90939cb5c212b7424214a7c176ff5. 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/NOPTR2412010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693118421d377aa6099d314532669b80ffbe3a14c08eeb220dddebd5eec5b4d8. 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/USANG2413899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438c9f058c881801731547e59c3a4bc49ada17848594a1f9af682e680830d77d. 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/USANG2464486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ab85db71be4026abad993b8394bfa5b4fdb919f2a9629592e54fd8ba9d6979. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USANG2464487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a43b07e579fb7df77804e9badeb72770acf47959f8f0889ddb39e7b32aa3e15. 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/USANG2446137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9723b0b0b4472e1968e23b9e3c81f4c3aeb63e0c7c202c1600bcf1cba9463e5c. 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/DEZC62581518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143bc51eb07ba2f2d115bd4b6705d644ae65b04a37c6ba7d6bfe95e8a6ee7725. 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/US3DF2568428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c53ce486b37ef2b7456ede7f198d26d999512962ff8ac635f492cbc8dff716. 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/USANG2028973.