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 0x21326fa6f72d234e81508565d6eff6b417897b690df30b071e1c94134c3b1be4. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b14e23f9-596d-4f9e-a8af-648e8db37c48.json and https://artists.proofprofile.net/proofs/artist/b14e23f9-596d-4f9e-a8af-648e8db37c48.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 0xaccb6f434edcef9712f9e2c6d196b933deef8ba6628bd7154f599cebf28aab84. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USCGJ0751093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ffa6fd47ca1d94c1d3dacc442532ec5b09a7d01ef1a18cf4a1c8b9db47e3e0. 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/USCGJ0751094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd686b8e697bace1cd01532062bca60204abb9a39d1ef8cb5c46c019c3c744ec4. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USCGJ0751095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb1de1c0ee6342b1c4b7800f8d22edf8a96d3d802d501cce6c7f7a2a0837b34. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/USCGJ0751096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf45d1e63d5066bc73d070bf69c101c071a07df41047bf5c2b136f2cd725e63. 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/USCGJ0751097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e5b08f7bc7a525fb8a5429289f4b46d393be75fd418beaa769277d243e31be. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/USCGJ0751098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8153b35e707d4861846bf4adabb723ccf6de8d2a9874436530dfacc6771beebe. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/USCGJ0751099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde97fc7b37affac67bdb7bb81892775ddfac8689e6ab9c7a6f22acc9d944f370. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGJ0751100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c416ac029c56a5cc0a451a836d69c2721114c2889e0813924add411d747b55. 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/USCGJ0751101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95313b3f1073ad83636fb33e5d696a5be7874e16a3f991a47b36259510c6ae34. 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/USCGJ0751102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8bd578505e9a7308067f24725bf957947edde2a1db00698b34a41fe9d49fc5. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/USCGJ0751103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc75f86c1698bba151054a45d41ad51d578486db82241a11ad71c7e31d79387. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USHM20852635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebb2765fb7203b0b1e1829b283b0608ab17294267f3debfb4e33a8ec1746634. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM20852636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebae1500c4e4569b06100ea84593d138bafe0deedcbc468d154c291ef78910c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USHM20852637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d63a04de2f1d05a823e25a5cf07c8cb1a304993431965006d983b57235c2cc0. 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/USHM20852638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31687513b826c60e5d333899aa9cf7438170332332e465bdb450b3777623794a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USHM20852639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe776f756571fc1e0e56da81a46ddd5c70a09e2770183068a8742c0076df69704. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USHM20852640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5621c67831943ad09e35ad4c4f1a8a41be10d91f38e0b9e48246dd2365e53452. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USHM20852641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9916ddbade2b264e66d61d1fb52d26b40ee6252b1adfea7dee86ef95f64cf880. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USHM20852642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc7032e32ffd1a18cd177a35097d137115c983b2f8385043141ecc948ebbb08. 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/USHM20852643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a28ca4a61138eee73a886554afe0bf4442679a94109fc32f7ac3868e84c222. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USHM20852644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4f7ccfa92309cd0e2238eac708a365730a5d75dec31e4a60daf6b768e9c9b7. 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/USHM20852645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8779ce2dbedbf55868425c41dfff96a126d11daf244391ad0d0bea72491217b. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/USHM20852646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f4b0e45e38abbb93c62b0de44f36146e9dcdd975222e5f40c2ad005a41b34c. 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/USHM80954996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd177a598597dd30c1f0d4d18dfaf0f98d3adcd74ea35dbf796946aea28dccc2. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/USHM80954997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048c4f45cdf0839f922731487035775d19c7c73e9b353560c214f39447be73b5. 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/USHM80954998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd426ee4ca812811caed103392f4725a80e2f96621dddb64393c94b21d888a715. 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/USHM80954999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36eb9ed2f933c4c44f828483f54ea8df6453a3547ce6c2fe7aa1baab6f05cdfb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM80955000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9098e896e60d0243765d95dd5185ffc2063a563451a35056d610af7a597638d7. 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/USHM81105001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a54390514adaa17e5631cec266f6fb5178b64ec3d118f00867145e871be09a. 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/USHM81105002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4781abd03e6e8e6cc38d530ece9de7367579fde5ad9695613dcda01bc814e26. 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/USHM81105003.