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 0xa4c070eed7f500d14a836bb8f4d531a4713d183fd909e108839c9707b2c216d8. 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/788d66a7-e748-4db3-ad9d-91b18f47e5bd.json and https://artists.proofprofile.net/proofs/artist/788d66a7-e748-4db3-ad9d-91b18f47e5bd.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 0x67f017e5dab1ed99e0278d7bf7bea14fec458ec98c5c69bc970f829c091bbd5c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZWFG2334229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256ea5926fd8da630ab39612b117dab43716575e5d69c3b9b1a3e10a0eb86251. 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/QZWFM2368152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6aade2ae3ed640d50c13e7c03733570e960ed2551f16a151a33cd702ea57f3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:34:53Z), 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/QZWFQ2379674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b1fc35d591253e11fd7b72d274d3e2012511c1b2ff9ea59e609dc360a2c99b. 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/QZWFR2378483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7055717fa6ca30ef6ce8c675d18e6d6cc415ede529ec4237c16ee2e4d67d330. 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/QZFZ22443443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb14df32efe854e3e1c232e4a7ceb99871dd2ecd196c159b1eb3f6aba5dae00. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ62439691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31960bf9a03a0f0d513f9d321eb30421ff8f98bdfa8ede46879135ab884010cf. 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/QZHN42491239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939932705247e162bb3df12af9ff2d5986517647d947b864a77811d2b21c9906. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:29Z), 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/QZTB72415927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6d70ac0b2adccd8ede72be6c5f6cb2f593e6a8754daf1b2b482caa31dc9c59. 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/QZHN82492192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd67f7d2346a845f3d4c7eb8cb12db7cc3d872dc3ca6b8597db8a34d4490417. 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/QZPLS2453680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4565378dffefa98e0f07973595463a6bd609b85ffdcb049e93cafdce7bbb8911. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZPLS2453681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be892fbcc4d63e2c5ab2c6d9e164210a68e6e67bdc1ebd58ae28e4847272a9e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7M2484058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036fa5c55cb0201ba2f3f060013ab54bd8c0eeb56b42f653001c89cbb44fd9ee. 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/QZFYZ2558875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bbdcfbdab15265e68b6f64757dc383c61785d5f82b1a720e46f21198fc692e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:48:03Z), 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/QZDA62517482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981d73f2edced4d343627e1f4a61928cce1d4eaa601664d27b431e9e7d550c84. 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/QZTBA2589195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a3e3d3f2bf065d898c37165436f802086fac3f2af947fed00c583028a77381. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFV2570460.