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 0xb4d63da3c856b9d2c5e73ff315f0d688d14398d8d4047ba1e2909805464802e9. 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/6b641bd7-6cb2-4552-832a-6554f12f04d9.json and https://artists.proofprofile.net/proofs/artist/6b641bd7-6cb2-4552-832a-6554f12f04d9.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 0x180b49227d58e59b65edc74e1b0e12c7d4ca85231a99a3dc5b8021bfaa259478. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:37Z), 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/GBD8D1900961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ae14aa37ac4e4c97c6f44f31cf76ed7ed7456f3a8aec56f28f77e82999c21f. 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/GBD8D1900962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe429acf0846de4f371f5597781ce12a38a41c089f381a33317a62366d408864f. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/GBD8D1900963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414a2ae916a21e08d08663ed45f0ccc88c847db37ae4f5d59aad35f75f448a2e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:27:00Z), 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/GBD8D1900966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4b56cd20145ab7df686fd1ccd1f708d51a54558f8b5fb927933458b53b790b. 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/GBD8D1900968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d57ff759a33396a3f8bebb439c725bd25c1385f551e2ff6ac478eee67a8b80. 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/GBD8D1900969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3db801a6e688fccbd208e5296c0888c2a1a25057272fc810525c4472646dfa4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:47:39Z), 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/GBD8D1900970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6d9abfaea85afa0e00e19bb226d2da7a90280f0c147605b9b1d88fda530c27. 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/GBD8D1900971.