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 0x1bc466ed4d7d3622f21d54009d54113aa76d38fc2e5c55d67016c0ad941f2543. 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/879a0e82-2bf4-4510-8efd-3f0a4dc03107.json and https://artists.proofprofile.net/proofs/artist/879a0e82-2bf4-4510-8efd-3f0a4dc03107.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 0x2aba6428c79bbf251a0cdf6e7dd1107bec811b4d3e8af8d5a61f7179176b1c0a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWT2030608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6ccbf9ef4b2af72ad1ae808b0e11119eeabdbd108c1d362aed941e85f1a4ad. 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/QZNWT2030607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15819ea25e182d82f026ad66fba7185ff61c8c6c58135d43998d6f0edeff64c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNWT2030609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683e8ba92eb7c08d57c91b7bfa046b9f0a48a75a9385665432e39fc8fd025d30. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWT2030611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5454a841e38bd9efae2ea953762b2d73ca34edd5df5587a7560130f82e26a77b. 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/QZNWT2030612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d75221f24eea2bfb97a1c217f32fa4b19d9722efdc383464f355d83d6df109f. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZNWT2030613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5917b5706769d888cc7194ce484d464139e5562cb838c549a43acddcbe40f338. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:45:12Z), 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/QZES92269153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f493046d4d3fd0dc402d43c741fa762190d9bfde2269cb440215f976ecca14f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZES92269706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb94fd98d5c3298dbb4e9b1785774dd7320a041413a926eddec9fa8619302661. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES92269701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5917b5706769d888cc7194ce484d464139e5562cb838c549a43acddcbe40f338. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZES92269153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb00a1efb1e1277a8571e1622acba78e6f3acd325fae982c353188749fd14c7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:49:56Z), 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/QZTB42430324.