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 0xf419f9eaf6ce08f8f09ee0ec035ad3ea3ce33677ab9f0379c5e185b647a73870. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/724e40f4-0854-4039-b2bc-c9b55a237095.json and https://artists.proofprofile.net/proofs/artist/724e40f4-0854-4039-b2bc-c9b55a237095.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 0x32fe4224167b2639fa1780598caa5d5e8efd4c4acbc0e386960ce541dcf2efda. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZNWX2559478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4004524df06fe85f8c6a49acc337a6eb80238ece2fef48d5224e91cd4a9e868f. 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/QZNWX2559510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bb21618a0c4b9dd5945dcde8c24ef07558089d0b80f49573168681dfba3d06. 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/QZNWX2559511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427429791db24287ba72f76ee1fc65f782ca28ff6fed6fc6615a6224fae174a0. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNWY2500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d798b698a69439cbfdb9319d3e55b8825f48bbb33e0d1a5a410ee8c5ba086e2. 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/QZNWY2503274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cf6807a1aadd166f5b9a03af2a0c13b768a061eda79f80d67dc9cf0bbdcb16. 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/QZNWY2534539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec9df973449206a7c1850a252ab82f7edb4b41b709d1c83b7512f1283f067d0. 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/QZNWY2534507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88cc1f664b1ecf6b1025f51ae2e8d07cd245e38e17ccd0bd575d52e905910fd. 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/QZNWY2534526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5906597ad5ab3931df35c18a9fc46ac92129e5ee7f57e771bbce972bb52c20bb. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZNWY2533156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8613a6f1706f609bb168abdc4be5841138658e40338cc510e11d7e7f4054c013. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZNWY2534523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92163de3ceacf2c006effbcf09af630ec06352ed05d49204554a3feeb635beab. 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/QZNWY2534530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3623c116a5a59abb169f4c89b9ccbd1957ec897cea811b6223dc41bbf18e849. 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/QZNWZ2530850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7640fc2099cb72ec870bcad75abad9b4a48527b862f3c65c47374f0f20dc8f17. 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/QZNWZ2530858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39251d94826bbe8b3ad41360e0b0d5748cab80d1c8f7f19a9d793f3a93b9692c. 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/QZNWZ2530855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a975c3330052fa5875bb05bdfb27dcf2a8de0fcbae4e82374413ae89e0dd792. 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/QZNWZ2530853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7f25bd7579f1dfa17cf78aa4aa26bb0ef2d183396e8dd939c86b8e35399167. 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/QZNWZ2530843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb27bd93980a9a56e3247d9639993aeaafebd6fd3dbbde202a74dfe9909f556e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZNWZ2530852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4199b166f0ad0cf9262ef8c4c8f37e3848453dcb874f924ad53759cdd365ed00. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZNWZ2530848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f22e3f746f38b7ad4daba7876c30162b14bfa9375ed82997d858f7778cc3692. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNWZ2529001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb009209e1e93febcd01925a79c50f4be2f8c9efb3f9dbff0037620b19e0b15. 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/QZNWZ2530851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f811d054292f7a3aaddf2f19ccb9d0a541d93811e3bfdf87787ad14e7864e0. 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/QZNWZ2577464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3b354c3ef6c34a0722d1e969241a1ca0b3622a5caf72d037a542f9c85c327b. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZNWZ2576136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa64eaa196575788cea89110126c2a6ddd1aa3a0d5810edfc97c784dd5f8c69. 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/QZPLR2520738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4db431c9bcb1945c312b0678e4d84f164d6f0302e0ccda1119727b10ab6d6ba. 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/QZPLR2519124.