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 0x02a7a94e61a06fe2de058716f8a7da77a8343cd9b7cafef53816dc5c3262db23. 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/40e9df60-787f-4c82-8f0f-6d02d602a4f6.json and https://artists.proofprofile.net/proofs/artist/40e9df60-787f-4c82-8f0f-6d02d602a4f6.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 0xdefaec62ff0a53d2b91f8dd2ff81dfa8ccfd1adc48bf8b6ee6467a5bfce3a5ae. 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/QZHNA1941389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b68a214a90f7cbafa0506d4ace69398a0252779a2f9eca08ea0a7760c4ed98f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA42032589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61424cf48d56d34cbb76fd1693096220405f8bda7e186e6189d8ed702e334874. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZK6Q2287293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61424cf48d56d34cbb76fd1693096220405f8bda7e186e6189d8ed702e334874. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6Q2287293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f63edfb7d9d44340aa228f8aada37b6a94ef9489a3dd21cbac122a357dbb602. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZK6M2289399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f63edfb7d9d44340aa228f8aada37b6a94ef9489a3dd21cbac122a357dbb602. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6M2289399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23237ff4c2f841500a1f7c7b856dcac3b8ad2dd13c49e5f93f22c067eaf7826. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:05:14Z), 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/QZK6L2351365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23237ff4c2f841500a1f7c7b856dcac3b8ad2dd13c49e5f93f22c067eaf7826. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:44:23Z), 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/QZK6L2351365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60668add7139fd47a204c0ab26aea27e31b626be253a06d8a4d8c33d13f0181. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAY2362947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60668add7139fd47a204c0ab26aea27e31b626be253a06d8a4d8c33d13f0181. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAY2362947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55ed0f11d88142e9a18dbf0a583a5d2aa029c555547e23c406caa541e24edad. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ2J21507764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe638dbad2bcce7454ed385317bdb0fedaaf0dba204c6b3abe526d9d6fabdc475. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ2J21507765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5956f42ba319f8b11ba8727a2246a7f7a5c07baf1a45c2844bd44aaab91d97d8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZ2J21507767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19e930437f6598def0719f364c20f7be01b8a58f0fdeb73383ef8ed2db24d23. 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/QZ2J21507768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9cd27a633f462cf6748eaadd9d925d85b7ecbc027134ed014d4855f6239781. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZ2J21507770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55ed0f11d88142e9a18dbf0a583a5d2aa029c555547e23c406caa541e24edad. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ2J21507764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe638dbad2bcce7454ed385317bdb0fedaaf0dba204c6b3abe526d9d6fabdc475. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZ2J21507765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5956f42ba319f8b11ba8727a2246a7f7a5c07baf1a45c2844bd44aaab91d97d8. 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/QZ2J21507767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19e930437f6598def0719f364c20f7be01b8a58f0fdeb73383ef8ed2db24d23. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZ2J21507768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9cd27a633f462cf6748eaadd9d925d85b7ecbc027134ed014d4855f6239781. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ2J21507770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510f7c2cccefc33bbcec2a3b5fdb862e1ce7e0830a3a06e766886586c3f38822. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZ2J21508371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b9184b2dc7b73c73750e72f3120c1f95a36657c408cfba0c1333f1034212f0. 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/NL8RL2554076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba597c6817aecbfa344b1c68e501483d108ee9809b682da287e14ccba3d2e71. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/NL8RL2563025.