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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17447f17dc9d59063902172cbff0f3f161af292879410efb5152365f43b88988. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f95e68fe-b9cd-48ca-bd4e-f50b1b5737f5.json and https://artists.proofprofile.net/proofs/artist/f95e68fe-b9cd-48ca-bd4e-f50b1b5737f5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb80fbb54bcba0a43c32d2a2ff2fd2f6ccc9d6e50121f956602a324b1760a5d. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/PHV021011307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcec5cf2b05be75e37023ea46a270287fe34641d749df2366b3afb3204d62532. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/PHV021010113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34974b9188217aed5aee7d55feaac2530fa9b6c8dd32a087dc3f82921cf627a8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/PHV021010119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeff9a87cb699e9b116f613c01e1a66eae8e46ab19773d6fb969e31942c4aeef. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/HKG291700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1914cc30010b3c0c89c87f068c14ad50c37827d5872df6888b77a80852d6dbaa. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/HKG291700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3299ea639662fbae5940599418ecbf05af0ae46462a85045c802cb5c6a2a2205. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:17:43Z), 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/HKG291700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ae69b902afc23fbea5ee76180e18968f238859b55e7192ba4817827d30b637. 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/HKG291700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d1397a83ecfb491fc8f4e80202335d8b76e3da09161612eee751251655755f. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/HKG291700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc75b46aca89c2cfb9bf556ead3808b9cfce3affc60a8a0cf72423beb23b7ea. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/HKG291700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3071afbf9ff36dcf74c270fcbea8697eb1f7d65b603732f32ee94755855137ee. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PHW011800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e16dab2647e773cdb59f81e8d0f09509c4d1105b489c7ca234172a24f287ad9. 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/PHW011800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d01b5d92de9ba1c555ee74b69f6d3ed6514b4c1ca17e535562030f8b7e85971. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PHW011800098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead3459145d8c2f0d999b6962352065e0bd3965c53790ea9a918b838ca59784. 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/PHW011800484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b32474d8f74d9b3d8464cd674f7d82a9312faa3a898b24a1b435d3dd672e094. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMEZE1941548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd2a8d6d0a68f9deb5f049a428b2283075f029e218da1af2c85b25d95d6836e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:48Z), 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/AUBEC2468882.