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 0x4c10ff8b89b6a29e46430e00ef6f395e1ff92e07d45eb8fe9c60bf1cda925881. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c77e2d9c-cd6f-4bf5-95f1-bec0443f6b4f.json and https://artists.proofprofile.net/proofs/artist/c77e2d9c-cd6f-4bf5-95f1-bec0443f6b4f.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 0x13ce4dafa63b47ba1e9be6aa3e19c1625b8016ab2216856fab5e72f491db8495. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:15:50Z), 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/QZNWW2114905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1822676d6960f7d4873b703978556f04537048b6b2eb32e37ad91330f444e28e. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZNWW2114906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea65ae657d9f2ed1af64f1a38c4129bb4a878a40698781c574753205b5f6f64a. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/QZNWW2114907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca8b38627b33bac96971da7a8001361db51e1f380ba4537f4f86c1b67f2ccfb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:52Z), 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/QZNWW2114908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc65f9589604d49dd6d10d8976b01e8d17c55f22d0ce2ab7195a6abd9a20a85. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:31:38Z), 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/QZNWW2114909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41379f7dae34b9bbb9f9d9712bbc85525d7899fe85339056d28107c0de48e1e. 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/QM2PV1679673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26f0730b3082bd81bd207198866be44da0bfc1596c02baf7c96a54050b0614e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM2PV1679674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8eb3f30a5b8029b0a616b59ef0db78b2bd271409a71b34b96f0379a628053a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:11Z), 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/QZDA81822652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9608e171424159caa196b5ac3135874da9ec565c4ac6b2f3c2ca657d7d96da7. 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/QZHN31939733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd771e596a2681709d6552c0c3106e786cb3cb3a29051fcb0f5b571d64ec01e83. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZHN31939737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93b1741c06dcf8d06fbfca2bb41dcec0356ee61abfc233554f9c713ac5b496a. 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/QZHN31939741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ea6bc6865c32cf21f7a26bddf7ff58359577993e45204c9e87a282f3702b2b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN31939742.