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 0xf931d63a3d93de7075e13b91341398cd4c035c5bb98dad134773223fbf9e592a. 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/639204ae-3839-4095-98ef-71c7983b6891.json and https://artists.proofprofile.net/proofs/artist/639204ae-3839-4095-98ef-71c7983b6891.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 0x6af1f03ddf78d35115c9795182dcdf785ff0b7cb232c5f0d2f01eeabc38cb222. 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/FR2X41970074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15237b3c3f65be00d81d0158106c2f37c092e03b57c0caaf61b0a48921184565. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR96X1921090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eac804f942d59ae8441a225041aee07d88d564daeec7f77a50a9165cb6ab0d. 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/FRX281963919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d8cf635209625520983c9b2291cef8d99d0142d0cde8a0e12b1ac88a1b76bf. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FRX281963924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e9bbcc05ab768a8eefc416162a2db8dcf07e4c21dcce5c2c6ed19a883dff19. 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/FRX281963928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414e83e5c5c6bf30eead3235432090f68bb9bf204639de274ef29bef059fc909. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR59R2152313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1803cafed9dd7cbe9404e089979d5b29009592c1ff2d452dc3d678753bdcc4a9. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/RUA1D2228842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe68132ec9564e6fa442f541e69633b7feeedcd8788675ccadc670fb9b733cae. 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/RUA1D2263989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad72b9274aa1c88ba082c3205ed1eaa87b72888274725858d3433ff8db59b3f5. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/RUA1D2408565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c586d7d97989c31aae4c0bbd47cad87d742139bc8fc737baa26f78736658b44. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUA1D2582815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650559afff417f4c3de77864ba7135ae904d49038774e56e957cb09537d848c7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/RUA1D2582816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027291abf233742b0d7938708636048457bda8bc23a3b080083fafc5273727dc. 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/RUA1D2582817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab9bdd31d0e82331968c055559118b12d2f10311484ddb9c03be26434f6689f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/RUA1D2582821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe78d6a316cf9c228730d417b6f31c7d290eef376d9119d1eaf5d46b3a917341. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/RUA1D2582822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e58965eb6ebbe4ad065fe09283ea41753d3125fca33f9f3404f241bc064b056. 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/RUA1D2582823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860eec47371fe430353852a9ba094bee282d7851841d12e39fc254179118cadc. 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/RUA1D2582824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b3941da522d988697afbdffa82b7e2926214fa5e7602f1e9765c0bf0635ae2. 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/RUA1D2582825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcfe6fa8afed2deb350e8d412827fd2cd5d7744986dc12e9bd905589f99d790. 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/RUA1D2582826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7904d378089972c7e460d6fcd27abfa89f8f8f9125b01c465baeb8c1e2629856. 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/RUA1D2582828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c42b93a0b6ed671a322d206a80b5df370960ce1e171dcf1d8eabe733437391. 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/RUA1D2582829.