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 0x98309ba0de9aa11551301d9e3c30a0b6df16023b50b148c24ec2d425953b0743. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92e5d237-9ace-4210-9cf0-514683b0dab7.json and https://artists.proofprofile.net/proofs/artist/92e5d237-9ace-4210-9cf0-514683b0dab7.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 0x6621f4ee27b06662a1be502a5d09955037f30c8f00b28c82f6b04d3d48a18379. 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/USCGJ1981496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be801f46813f8b6a64b8a05d7d52f1ac370d5c45d65b5b282e2a2c38591a1ed. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4Q1954473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5189dc9c56ac5c14cfd1d5b409d71ec883381a3974b41d9d896968e8bbd596f3. 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/QZK6J2148907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bfcdbbab343dd375ffde0c24dcd9037fc0b31161bba3b2bcddcabecafb751d. 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/QZK6H2170410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefefda239a02a71ee6971e671dc30f79d53400109ffca155f5bb9804ff8b605. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZFZ22254318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c7a743e364b2e76a99fcd812aa6c3c9a058af11bd01c8aa269eda57b9281fa. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:09:29Z), 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/QZHN72262216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799d5e531a06b3f6afb685b00f2017c8148bfb0c5bf16007ce23113ca1f51446. 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/QZFZ32357927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01451ed9e5816176ac6f466481b2c9c5fcc0f514c53204e0f24e98c1bc97f915. 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/QZWFL2378633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0948112f7f12a7189bee5be1ad98e280e713d43583ed264539f9ece140c5ee1e. 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/QZWFL2378641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ac1b2524cde7880ceb231be02e07c3edaf6b753864a076ab1a913a13dda585. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6H2512552.