Esky is a brand of portable coolers, originally Australian, derived from the word eskimo. The term esky is also commonly used in Australia to generically refer to portable coolers or ice boxes and is
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 0xb8447cad5d9423b30b153039e9e3ed59b73d092a90cc828193c20df0b6bb2dee. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de049189-39b9-432d-a2d7-4511498e7c50.json and https://artists.proofprofile.net/proofs/artist/de049189-39b9-432d-a2d7-4511498e7c50.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 0xb7000077d7b8205c1b1bf03d86538a49908450be316c26256f0232baa59e424b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:32:58Z), 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/GBSMU8576336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa6d801d7719b80e7f75425152add885d3ffc874c8ac93024891950b958e363. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/GX3HH2238208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181a32a2c71f307ef6a1b84aef126f6298470fa3b71cec8054811086acc04d88. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USCGH2474840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0577ac7d12a4395f7e3d2dd89b85db499bcb7b173a78d3c7f016751dfc2cd4. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:44:36Z), 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/USCGH2474841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52f8bccf5c020288b1cf4de24951935faf490e17e6a3fb5840b5d0d3a952584. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCGH2474843.