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 0x0d752d3557978ac5897c3065894feb52f74e8cc8690be8b6c0fa1ad109703e78. 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/2765d0eb-b933-47f7-a31b-01a642261feb.json and https://artists.proofprofile.net/proofs/artist/2765d0eb-b933-47f7-a31b-01a642261feb.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 0x1b964cffb615615ca1a75f96072a9ac338963ca196cd18f4f0453f08931c139a. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USA2B2101026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c75cf7c26a8ece0c7fc4728905a51bc07b64f13170b97f3427bbf8000185c6a. 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/USA2B2202224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa252abcfd2dc245603c484ee35929451cb320cc4ec88e0694b385b6cae30648e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN82344257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971dab58c6f074ca9f32f4166a2ea5da383f0a0b5c158cb5ab19e5e4cc3ce5c4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:04:02Z), 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/QZHN82344260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e7db6a394c0c0dd7dba9a934e89730aea5102e7f6e8cd36bc6b11999894e4a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN82344263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250bafc25835cee8a327fae6be960aa7a19a675f3d78a9eadbf9b2c93fe5ba1a. 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/QZHN82344265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1efd1dc164031614420fc1ac898d0c0a1f65902652667bdffdaa05f73e4c4f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN82344266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898a4663e36d565850e901c12997c787fee54b8fc0ca9e652e0a7f5ede2e4b11. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:27:35Z), 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/QZDA42408879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9c6fe2bb797ed9a129abda01ef67c3cb695b0b86710dbde78e8893450cfa1d. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QZDA42408880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f48ca0a127ec826ec3e75d5bc5ba60b56fc866699a16cfbdd4a2af7544d6a2. 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/QZDA42408881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fad6502ce116a6bde53f89213571e0cf2d8765c7b52c1e4b41bb5c38cc3c10. 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/QZDA42408882.