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 0xb9bb5a344e4b7b0e8ff88440671c248aa344046c81dde289932709972b6b8e57. 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/801ba5da-ea5b-440f-9167-f2578cc59c05.json and https://artists.proofprofile.net/proofs/artist/801ba5da-ea5b-440f-9167-f2578cc59c05.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 0x94108446ba2d02a0365e0771e0e91e1ff9c55883992f3a711fecf9d01f211b93. 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/QZHNC2365978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131154c9ca529253f565204df77618173ca8b5c92905a0f116d3dd38f192a781. 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/QZK6N2339178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad67d5b35dee1fb12deecd46876765963d0a80b709c2d4c7c67b1e6fb5ffa29. 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/QZHNC2365980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf395427a7dbac7230185d8d6c8a17fa75aeabcbc06bd227d87a889775e790794. 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/QZHNC2365982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8fc10752ffc487d0e8277949de45a720a14473c428f19e7e4bbbdc609b095a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:31:52Z), 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/QZHNC2365983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21337d62658a1a85531b318008a9f98b5a40a8bd3e0947ce75a55b84fc34323. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZHNC2365984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cfc909322154a2aa14c483f7d44de9bf2633ae32bc405c12dfc2b941737541. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHNC2365986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bbbe2a2df5e9e513e924c5ad8d4162ff6e466a56816bf430366211e2170097. 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/QZHNC2365987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10be7fdd3516fa2e7fe253ab98b3be0d8b51f550283a32e2c8c2a1fafad06f78. 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/QZHNC2365988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9da4cdc8ae5b5ae1315beb4f8a954077b77bbf6688cc7e2d4a209d3f2b1d570. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:15Z), 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/QZHN92328850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53499feadca390171a0c4aafd1a83aece0724438b47a41f0d3b45635c993cbce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN92328852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5601179046bdb26d350106f415996683f9d016372e8de2f7a8d1ab1998cc8da8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:22:28Z), 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/QZHN92328857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc3452b94b74be3714268507b2ae20b6799469970fcb4d229cfb1c3422364e3. 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/QZTB42324747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abea2726173602d217432d721ad975248e15818fac076ac2c8298e72c0194b9. 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/QZTB42324748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38383dae717d40b92cfd5ca15776361e9b337394a58e76403e590aa18a4a2680. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTB42324749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979cdc76d0308e5b26c7d58260fbc0ea61feebdc2066fef71e60d38a0c42aa8f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTBA2259101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d526f5d886873dca7d669bcd2f081841fec8452cc08daa903d8d91eafa5a27. 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/QZTBA2259102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba7acb6f7b8d0ad24701c0e9ca270ce308c3a893291804d661b88bba00a4b28. 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/QZTBA2259103.