A windsock (also known as wind cone or wind sleeve) is a tapered conical textile tube made with relatively lightweight material. When hung from a pole, it can be used as a basic indicator of wind spee
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 0x5cdb35832c0e8423dea48bbf184bb3c61b8dcc1397cb03d125c98e4408ee7881. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa3bb4cd-1619-4dee-b82f-123981e4447c.json and https://artists.proofprofile.net/proofs/artist/fa3bb4cd-1619-4dee-b82f-123981e4447c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The "spectacled bear vs. convulsing scout" Demos
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 0xf705f702eddb29084983e7ce5ffa7ae41c63ac4ae994de6729c03800a28b70d8. 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/QZFZ32530150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7525e009b60b93feafdb0a8ec98bf353b1c366d6052f4b4684762d2f614038d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:48:56Z), 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/QZFZ32530151.