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 0x5cb8faeaa734ba7ac089996b9604ccf8e58c0708ed33d69429b5df5cf9993518. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93857141-5734-4aed-b6e3-0d20b73638b5.json and https://artists.proofprofile.net/proofs/artist/93857141-5734-4aed-b6e3-0d20b73638b5.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 0x7bc2da6a2b299576a29f5d155fc51810f4d76cc0706d7ee41f3d3bd20aefd234. 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/DGA072415265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317a6d8056bc19057062bc27243d9b4d3aefeb34512667852dbeba2ccb1798bd. 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/DGA0Q2425172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690e9b08c015d23834d8f188900c084388b341c7d0464a3c6d2ed0ae50ebe608. 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/DGA0Q2425183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101d40a9cfae61811e703d9e85057cc43f1efe63f63468ebc5fd413853a67d2d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:09:05Z), 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/DGA0Q2425196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b40d35f41ed7d63538cc4c47a0e58d8ab014e973dc09ce1938eacd5fe0f794. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0Q2425178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9d54f966dcc115fd6d8541f26a27a1e1981790beb1e9006a92b3247cfad970. 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/DGA0Q2425179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe93cd89e5ad896007190e86b4a8caaf96b6c532303a22f9603be8304bdfbcc. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DGA0Q2425182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9224077fbea04ede2d9a485bb6474b15f6bae8b07eb297b934efedc8f9b90db. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/DGA0Q2427999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e0fab426f71652a117a4bd4420ab967bb3eea762cda1b6b632567d6b70ed67. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DGA0R2463820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f957b7d86f32b1b132493e149ee483dc9c511d529695808f2cc336e4a7ed12. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DGA0R2462928.