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 0xaa28f2558c1728e9c53117ef6616dec7e439d78db4a6cb167f554a580bada092. 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/5d989dee-f1dc-49a6-bca6-fbaa52ef3dbc.json and https://artists.proofprofile.net/proofs/artist/5d989dee-f1dc-49a6-bca6-fbaa52ef3dbc.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 0x4ebf018036a05a0b31a8dcf897b1f660d26b3909148cb46ef73c186431184023. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USHM21958546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fbec24310428105a5fce2b2d6056efed62d1c7d526b9e0f27048a4f4b59a05. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZSYP2273605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa36cf784afef9e4c7a463a5d76168cbd702a4b90e943870daeec4a7d51ee19. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM82339515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe698d41e4363f82cf7bb6fef92cfe8e8ad8a1ca89e4b5c92fc8f306fb8dec749. 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/USHM21958547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ed87967676b962bfa0caa766ae08362a50672c538d331c962961852240afac. 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/QZHN72205084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22ff7e49840c9e55389758913bbaaacc8ca4e853bb5dc319ead2b5420142eb5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:24:42Z), 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/QT3FC2508742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60141b03deac5fdcdae23d9d8def945c79c0a2093d6dc9164a17bd76271ffd9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:20Z), 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/QZHNC2224027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7f706cfc24dc9f731d7efedb3acde9e42f2f7121070327d91c65c0388d0b15. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:59:21Z), 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/QZNWT2574309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadefb91014fdb0cdb67dfabd1fe85fd4669874e5a8822c3555547c5939070dbc. 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/USHM21958545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0a43305e906952e2ae55ad276701b4a5dddc1e9c9fcf5994dcf8cf8e0983e2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM21958549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307f5137dc588797123755e8db8fceec8d4dbdb871a98f5349fc1eef85d1cc26. 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/USHM21958550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a5b5f622c80df73d1328224500714ceaddc31383046d2d26257302a99545d4. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-20T12:01:07Z), 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/QZTBE2405729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2853939ff1a699c2a08ae961ca25779510a863685cb920d584f36d932d2d5c7. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:51:36Z), 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/QZS7J2228047.