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 0x7c7e12eb00336b094295eee75091dbc165c3be9c538cb33ff03b453f3ce071c8. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/723f0c40-608e-48c8-bc41-1fee755ca9b9.json and https://artists.proofprofile.net/proofs/artist/723f0c40-608e-48c8-bc41-1fee755ca9b9.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 0xe2406eca8b5ee9a4f84f983cb8c51719eeac3e4da85f28d671cc8e23a14dfc26. 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/QZZ7X2434784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739ecc3c6de97344cbfed05ddb79b601cbcd2e1a1171339115700ee83e062aae. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QT3F42405985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20420c41fc5641e6a01705053c36fa58e5d6c0c46206709264009a0433ca992. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZFYZ2507153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e04ef2f4941e9ad624a678ed8cd0385314add26f65b06d22258019a1614295a. 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/QZFZ72533337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2cf4290661ad6d640a9ac325f96a5a32c815e1b2db32b1c689acb11010b583. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZES52528436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c49bf36698cd6f66722322f44b2b5c3bbf778cd463a7ffdbbe1ad49b7107ff. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES72583903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1ba1eaf91e62c44d9bb173d150ae920b13701cc304eafcb33e5e6d6284acbd. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZHN92529271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ed0b9eb8bc289dbfd4dcef31171a97bd04fa2e9a53a0dc8e5a3a283fd78af1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNB2573117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dbad3b8ded8dccba230bd7ff6152ef75c221b36e6d97df78a58c75e77c886d. 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/QZK6P2538223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a0ab70ed98a84c4a7f6287aacdfd424381d960d0c80e4377442a2054abf9a9. 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/QZK6L2517571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3655a4b5233edf7d7adaf0a7d1130df6846a61886aea077ab700c0643c687f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6H2532177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b5f86de795fbdc6d671fbf2fc40b3a13959eea3f0f56f5e000b9d5ae37278c. 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/QZNWY2529671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0101372cbed3e7dc9a5002f40bc366f422e791ce346ec75177959385fa5e377f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:35Z), 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/QZTAT2581652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514b978d9e7de90328f4c5a24f0750f7839fd3270b5244bf6d326f19b6f1e933. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTB92545802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7788338f8713034fe0a8b72166dcbcd12f5e58458d8759ce43c9b13a0fe11eda. 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/QT3FH2531528.