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 0xee6f5c9027a03ff87f8e08187c2d4739d7f1afcdfa65cc165d4eb897b607f097. 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/4826b16c-3a89-4f67-a2de-20ac77a1c75a.json and https://artists.proofprofile.net/proofs/artist/4826b16c-3a89-4f67-a2de-20ac77a1c75a.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 0xfe218f8b4badedd17e9be374b4542979872d016bee5b558d493430578fca7819. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUA1D2112262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c3907b33dcf377ec310cf2eee2d8b8b2b277d5e79fbca4e073bab088a9c1e4. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/RUA1D2224488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7861b9027ac6ef3645649c1bac6bbfae84655507a9489e9192a51034edb386b7. 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/UKEX32225420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb25e2f7c2379a23279ce68e8ee7baabf62068805910d5c24fa3308aad389cc. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:24:32Z), 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/UKEX32225421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b64196a649684a9182982c7d5ab95782da0e691498439c684664b0cd5fccb1. 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/UKEX32225422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19899016737457eeb5b07517a157f0e4dd3d5663f94a434f4c8acc97049a3d87. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKEX32225423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da6ffd12765ed07b069dfaf73059c3a9d38c9313365e118561a8e31d5af8441. 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/UKEX32225424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb798cb125e7fa7d52584ea898d160d50490ce5096b50a0be8f7b9bf2c5f7c6. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/UKEX32225425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e0137ade70f979b3ceac65dff95e921a6e3bb4ef4fe9dcbc535f63913f2290. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKEX32225426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d4d8c6a6d9b28f11f2b9ab0e6b9d044419fcba162dbfbe838256dbd53ceecb. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UKEX32225429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4be32aa4af963a1a47571e520b4bc64b478cde19ae79ebfb2c912400656bd6. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/UKEX32225431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f00d1b2896420941acb6dc07004c3fadd8491a67f97d45ddd096fd4da0f9d6e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKEX32238083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c55a5561a10ea995e2e695ad4fe03b4be4ddfa99b2de7211a2df72b1d902b77. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKEX32342030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa693ec6f9e48c645d5f2e995302a1ff8021e2695a9f972ab1d7e4c55d179969. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/UKEX32342031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe184194aadc6cf4b13e3e054ea52388fea95b740123c3be6164b9cf3657f3a7f. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/UKEX32342032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc724689716348f2bcec4c412bdd549db24d779358dc22f9ca027a259739957. 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/UKEX32342033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ffcf756053424b54cddb829d689eb2ed1270d0fc0af7de44ee9d09ea5a063b. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/UKEX32403668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece278fcb49ab3b79756d6dc82beb2badb7882a0a0ca37bcbbaa79ce0c0054a3. 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/UKEX32435963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d6f7ae7b207bf3e156770c9d56b2257bb3c30211c1fba298b6b8e17e73a1d4. 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/UKEX32435964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ad1c6c8cc2481006f84cb83bf18ecbd47e5b8a3d714dabbc6f3e2bc53c099c. 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/UKEX32435966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd46dcf0a349461d5f7edfd89dac4ee53b9225d7d6a60c0489b066da982221be. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/UKEX32435969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f566a58444129befba53d2797d6ec09f7f6aa104fe654a453ebd8494c745e5. 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/UKEX32435970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291fd6110f2a879744e84756ba4710de42bc8439f290c438fd144ddd67c6143e. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/UKEX32435971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe835192499f3797bf23e07acd6d58975ed429beaecbd409b5559285be6631a2f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/UKEX32435972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d32259065db2882394027a58eee4f9c22268074547d050fe5e78db91efa4919. 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/UKEX32435973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2dcd018be0e409b5b856354e7c6b3150c66505b92a1cff87f76291028c393c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/UKEX32435974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8f21982b256cd7af05476e3010fe044e0b806ccdac31f0285b4043860e2d69. 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/UKEX32435975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d062b19ae8a4e4b55045117c74c510daf50b709f00834c67bb350bdc845208. 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/UKEX32435976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe774024e61b5c690cbb2786ea8aa463544e3c46b3fb4b8d2b9deab37c3e03ed4. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/UKEX32435977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaa3a5d0f35c39d6663977873562a8901ae5a98f5379b53f5df8d91b294d518. 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/UKEX32435978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118bcee6dab74eee024d2614b557d1ab5c37f7f5eed40a71537b9a5099dac69f. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/UKEX32435980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b8f2727db47cc1ffa829b184d2dcc7dcffe3865447d34a70bef78ce434ee7f. 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/UKEX32435981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf15052c0afeef8187e2f717f73d3630799d51f762e5d503cd2e850e08cc2c28. 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/UKEX32435982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748beec6fc41d6042d74d3beb4951c0582f1647a30ebc8546c3e1f53c79c3283. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CA5KR2588450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b1d97cc799605948fe1f57180cae751dcab1069b0dee5ed6371aa2650dbf15. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2588451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5588062d9912a0369fa4983bf90f68840adc663a5003bc1cfb1ed7556f0bcc88. 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/UKEX32522090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e65d3d80c87b797d033016c4d3e5f6575ca10b4884aaf6b4ac8b285f87a0f5c. 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/UKEX32424817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3684c09a79607a4421d1f96103b034c0e7ba8a77d6956067e62a96cb4a11d768. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKEX32459528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c7ef4c8fcfca1f0061b5893326edf4b27283ffcdb77bbc10b33dc8df85cd3c. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/UKEX32225404.
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 0xca79a91e6a747b4a125a6a66324c89548d69afddd295ca5e361736232fb05871. 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/UKEX32347238.