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 0xb84e461cc045dcf8d4fdf520b89b7e1c9585eff7eed965749343768cf89bf662. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b473f669-f0c6-41fb-8ada-8751d570fd61.json and https://artists.proofprofile.net/proofs/artist/b473f669-f0c6-41fb-8ada-8751d570fd61.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 0x7c9ea76bfdf3e33ae69a3304bcf6b9eb2780e2df299de042b4cd0adddf9f237b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FRX202208983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bc7d8234f28bdfd57643abbee8228b76a2c8615bc11f29e20e1754e3c044e3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/HUA612501483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf94814744766f4d1e538cafca8fa81831d2158c848233fbde1a79fec421d3d. 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/HUA612501484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf279264a09acb19f6e29f1f73c0b6f247545445c647248b53ecb392eee90abca. 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/HUA612501485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa835cfa35dffa25d817ed59b3a814c7f3f6f881bfcb93258fa567b164d1cbefc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:03:42Z), 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/HUA612402082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bcf8360d94be4ace58e98ae492c559191f06b1bc3493ead29128b7b30c516a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:25:59Z), 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/HUA612501486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dadd06fe8b9035a2cdada26b1cc5fc8bd8fa087e8fb831aedc91a05df36b70. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HUA612404861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3ce4479ee5ff4cac05f66ba86e9cc7d03f5c83280b3ff4f3cc13dbce4884cf. 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/HUA612501487.