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 0x06ddc771e3898befa87d4abba63bdca5da05b0f9cf0f3e7e6786c6a532567fbe. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83484abd-8447-4038-9d0d-01c62b6a8296.json and https://artists.proofprofile.net/proofs/artist/83484abd-8447-4038-9d0d-01c62b6a8296.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 0xd9e05346c526d2a1c354c09036521bd34bd811ea0ee346b3d72869936fc0c2f8. 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/FRX852100400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253f482c4e7acc1088430053b79d9865f2753ce86ae38ddda8263c9cea7ce9f0. 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/BEKV42100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072adcf1d3ec54d9912fdfb94fff69ee838eea1de7da08e5f6f9d59f48952fea. 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/FRX852100520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333a99170aea631ddbb0d47edfc82084520e1121c4ea2a0f0fe90a0a555be1fd. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BEKV42100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ed1a53e302395c8062778e95b0622aa6fb21d69c88da8c839794f65fb5c80e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRX852100880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e289d8619628fb13bf2b2dae5238d546c9a900187b2e7481301fcc432598ae9. 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/BEKV42100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33da0015893f0a243f136b6734bc2042b8d4bedb910fb39c546e820901029dce. 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/BEKV42100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e05346c526d2a1c354c09036521bd34bd811ea0ee346b3d72869936fc0c2f8. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FRX852100400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c45878d0ad9567410dafaeb95adb8a931440da82847ec6b04fc61dc445889ef. 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/FRDFA2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f735de6716bf4f522d9de19b64c0a47ee9a501e83ea0fab728396f3a190835. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRDFA2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6574dcf40e0309bdb3e18ba5db947886ce1528cd8247d93d8bfbfcab7705c4e. 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/FRDFA2100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd171647da92e6dee4bb20ad2ed452ca680d9d66e1a605c761d5446f6c0f00c. 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/FRDFA2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bad02b701812856ea4b319caea682ed6a846b9a4267c6956d0e5058a4bf0630. 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/FRDFA2100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b4fcf982e50778c1a42a94c8d3feb1de59957e587b9a409980e3e23043dce7. 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/FRDFA2000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d61bb40a7c75e729c8e590640b92c0d84bfe7c4a2148ce27c5a437109b6ce84. 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/FRDFA2100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa05511da23bc12d39792dd21f484aebb857e49bd22e3c705ddffbae9ed9621. 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/FRDFA2100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e940328737490ea2b83abd1e644a656a16c2af2aaef78b71f1513f7d65c813. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRDFA2100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2796accf43cecfdf936d81797beeb09aea3985efaf3e69789e29e750f59a57. 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/FRDFA2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382ebebc2da8c00ab4ff023fc5ad463476bd82292c705131af2662432eb4b99f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRDFA2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa639305d05f0d5e1454d16bc07d27c7c68ec95abb86f6446b1971bca79a7fede. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/FRDFA2100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c752c51f929e514e664edb9fb95755f190502d16a43358e03573ae419f1de0. 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/FRDFA2000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a241f4ed0a1624097f9c72a11cd9ab1a66029bf243bfebaa922ea50e87d8c0. 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/FRDFA2000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba345f5ad535ee5ca3690e1e60e05e94293a963da48b37c6aa59d3f74e7a1e1a. 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/FRDFA2100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf716b72397c85350a365763fe5186d784475cfda364f66baa3bd60083ff37830. 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/FRDFA2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f29309178e18ec566b3b7ee563e008a4daaacbd5c251d6cd031bd85e2a888e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRDFA2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d2b86d09b38c362f67c92b5bbfc0083ab373a76c70471977781ec5f827b860. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRDFA2000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5486e99fd44573a9683811ef81c6944fe0838136658c20b3841cbff100c8e401. 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/FRDFA2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1d9c138241489717c02b43d66f9fce56e3fb8b7996aeb048db93e4a3c1d48f. 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/FRDFA2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba345f5ad535ee5ca3690e1e60e05e94293a963da48b37c6aa59d3f74e7a1e1a. 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/FRDFA2100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846a925505c91ab08efb211c96ee9e0fbee425fccd7557f874afe9e953f22406. 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/QZNWV2023959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa622124081312590701b7fa4aebe7d0382faadf2b46e2b4136517d31bdfc31b9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZHN72089204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dadf9dfc70c08c8c2d44efa956d59fba5ea6a23209eed25f8588e914a243cba. 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/FR10S2235367.