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 0x7d260a9bd84ff203ca7e259997f47d81a6f8d0a85398dbc7ebf9fb901011adf8. 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/90444a38-da97-4c90-bf87-839d0e541601.json and https://artists.proofprofile.net/proofs/artist/90444a38-da97-4c90-bf87-839d0e541601.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 0x66018668a0ccaaf88426d0320e1ef94b4463b9570ca8744d16ae36ae3236b0ff. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QM4TW2184247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de473002920de59126f1384cf587056b4544d3dcb2ad69042b89c5be20a673b. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QM4TW2184250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb0ffce9edc90d2b2c3061dfda8c9c8ed54f957adb78d3a158815abd6cec8ba. 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/QM6MZ2116025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb0ffce9edc90d2b2c3061dfda8c9c8ed54f957adb78d3a158815abd6cec8ba. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QM6MZ2116025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241249d14832f68b3708048371927870b3eeb4bf9337237b70f4fe8efac8dc88. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/NL4YD2100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a695667319d00f2d60d2daed8d8f519a088696d05595b94246c29a4a1459b2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NL4YD2100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994390343a01b85b3605faf262aa3a9055cb488b46c34fc809527c038421b837. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NL4YD2100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddae4401ebe170fcb585006da2ee73584b0c5a8822ac30a216a3543b2dbca5c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM6P42130337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf043d6319049bd06cf34c073f7ec144690fff8026afa521d464945fafa59ac01. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMFME2177829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d31ab5b352f64488316690d6d5ed5a5b7bfe1564c7f8798229b0d6566f2929. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QMFME2177830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c23ab91a1ba36085dd1ad3c47bf5811e03017ce99abfb99da3465007d6a2bd2. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QMFME2177831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eba30513b80b61d3e50d1447149e9a951eef4130ba3e9eaa0be16d0604c34c1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMFME2177832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab72e5daf65d2687c753c52fa6080358695aef69459c2ac52c5b8f48cf9272a. 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/QMDA62175065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19be80b0e2a1f1b9bf66f07e427162a845f8a82db18eddba2faa379aa5a5f6e5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QMDA62175066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01df08c7f408360c56e2187d0c058b669ee97f9d0f6397950305ad58c079688c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMDA62175067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab72e5daf65d2687c753c52fa6080358695aef69459c2ac52c5b8f48cf9272a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMDA62175065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19be80b0e2a1f1b9bf66f07e427162a845f8a82db18eddba2faa379aa5a5f6e5. 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/QMDA62175066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01df08c7f408360c56e2187d0c058b669ee97f9d0f6397950305ad58c079688c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QMDA62175067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbcd5138c3a5f1f74fa39d076ade392c1688b022eac8f6c12014a36ffe2fc66. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZN882176200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746ca8ff964fd285f52435943fafdc6f7ce43e193252e32aed1e61cb6df364b2. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/QM4TW2294586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cfab8d0081b9426a3449d03bfda9914ec7f5ada3a34a71305c793457ca3afd. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM4TW2294587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746ca8ff964fd285f52435943fafdc6f7ce43e193252e32aed1e61cb6df364b2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM4TW2294586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5445590466cb9c9e307093198e7a7dde97773c0b3be50d61eb2446bc9efb801d. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QMDA72289366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9342a78fd8e64e7c383c2b0cdf7304916217c23a06a85040479016c799e1f8ac. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE5ZV2316501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e46a1ea491c8a621ea5b9715212e8671e7a0b999e74206b2bfd268fc2419a47. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/AUKDT2401881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59412927c92bd81691f371a67a4fb6cb6392f2f61cdc4fc53fa69a5f12dfcc64. 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/UKZGC2401967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a77ea53f0e9847f562b96472545827c710386e77286b64c11743394cb1d216. 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/UKZGC2401972.