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 0xcdeeb2fb8f79f4280ac6942eef7c5d1d9cf39b067db3d6c6fb071fcacb46b362. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b017119b-d7eb-42e4-bf4b-c32705adad37.json and https://artists.proofprofile.net/proofs/artist/b017119b-d7eb-42e4-bf4b-c32705adad37.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 0x9cf6f2570b1bd9afb5f199689295e41e9bdd211b19b2389b7a86a2322691bd74. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:24Z), 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/QM6MZ2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cd9de9c7a23aead64b2eb5eef457fd77311c9d973cfb82b2ff41272128c70e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/AUMGB2401970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8592834a988c794e1358f5a3992a36c0065062869f2c10ad35efc27d68b0559a. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/AUMGB2500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3c749b86884147643fb6e2bf2de5768cddade186e17c6dc71ca5f1cadebdca. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:17:25Z), 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/AUMGB2500943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bfba332a1a746cb695b997a0d51ffdc6d422331605e38a6fb6bd3e282222be. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/AUMGB2501009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3c749b86884147643fb6e2bf2de5768cddade186e17c6dc71ca5f1cadebdca. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AUMGB2500943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811c46e7d9c9b33c17309b5d0ffe42fc35618e0e6138de2b7f8fbc87c7e208bf. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/AUMGB2501011.