Acco or ACCO may refer to: Acco (moth), a genus of moth Acco (Senones), a chief of Gaul, who induced his countrymen to revolt against Julius Caesar in 53 BC Acre, Israel (Hebrew: , ʻAkko) Acco su
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 0x83a9c38259dbd09d61154275116ecabaf503eda88e73fa7a8bea94d38822047e. 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/117385b0-af93-4621-ad44-af409fea5a67.json and https://artists.proofprofile.net/proofs/artist/117385b0-af93-4621-ad44-af409fea5a67.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 0x77de76a793267cd2649eaa9f0bdc2fe5e7ceb58336e560cc6d419b95ceeb3cf6. 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/DEQ022391398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b68eacf2ead01ecaa9b184cae6de8fb7ecd5176af88193d3f0aaa6956c4941e. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/FR96X2478181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcde4ea60bccb1bce66a927760356022216aaed4408934b0b763d6cf54659d92. 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/UKZGC2503278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a10c0ee5b99931916eaaf049c11d6bbc821703eb8a554ace15e6b47e885dfe. 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/UKZGC2503598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1681eaa6cd944a1a79c901c9f14cae5db005d8d117bbf5af373857296b11595. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:32Z), 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/QZTB22516528.