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 0x3a368bc385c36fbced425b26eb3b509d8acb5805757d5078ff09ba462d813122. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe466df8-40fc-45db-a207-a04f880b2a7a.json and https://artists.proofprofile.net/proofs/artist/fe466df8-40fc-45db-a207-a04f880b2a7a.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 0xa06fef699c046677d3101e88a02d21fb07ecef8d59c59155217c3644d237ce33. 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/QZHNA1950712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe1a86f3421488f12363c3dc0c22422ada95707b9874303e0045b25ff503247. 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/QZHNA1950724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53904c667ca133e457b8440dcf4b2cf1fcb359c86b77b7eb91f6dc9ba7a9e1d. 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/QZHN91917120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01573a63c086b2c8cf52a63b1b3c7e61e8a9590ce9ddd11fc2ffb7baf7b6f116. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZHN91917122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dda89326ac1f67b9fd522b87c7a51c998c80c36d1ddb81a52276794a9cbc6b0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:08:35Z), 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/QZHN91917123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8b81f7b9844bc6d21d100fb7e32ccb664ecea643ab65d623748d1efc4ef2ca. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZHN91917126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc363be0a04e0bb3f994c10a497ebba3d98c6cf9ae190ac3474d9117ceb6202c7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:09:31Z), 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/QZHN91917127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b2ecda2e82cf7ef02796aad11ba9c59edb6c0832a1335cfbda3314cd5fe3a0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:13:57Z), 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/QZHNB1982446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6db4653af066ea7512c4b99fc4c44d49495d072b6a40fb12e02e1a9c923087. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHNB1982450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e18726103f0747106c5fd618c772d9aa510bace59f0e944a3465de4c3068f3. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZHNB1982451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6046d672fd8429e7de277bb660054519b03faf6a52f3e7c3ac9d1d719e40cb. 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/QZHNB1982460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30706fe0d7f7bfabb9742fa34c8cc6705b46b2727f1f8c1ba4a717d855e885e5. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:35:22Z), 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/QZZ7S2429201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e14f5ddb44344699e92707e8b7f197db78dbc24d53a93580f360fc68f96084e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZ7L2410319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e4ad7445004d756287a52def0a0ce4fb0add51a2db6d1bc04257fd3b871263. 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/QZZ7S2429202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87de205dc77e8de161ac34d50440bd12d79f6ab0cf2f5639c907a0842d88a2e. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZZ7S2429203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bb9b877d17e0ab15b6a25e01903d9f8d1a2a7711b5a00c3f8d963598d7db20. 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/QZZ7S2429204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17f047ca5f8ebab06747ce99697500f27bc1e6588750896b14548dfb7b90a11. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ7S2429206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbab08e1d2b0ab0ab563ccf4beef08e6c7551f8a22685b13bd339a8de0753aa4. 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/TCAHM2357973.