Hako may refer to: People Irie Hakō (1887–1948), Japanese painter Hako Isawa, a character in Japanese anime/manga Air Gear; see List of Air Gear characters#Hako Isawa Hako Natsuno, a main characte
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 0xaa2a45c91e55f747abd95a8bd604e8d4251de461fc2a72e1c02a6be9642cc415. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a056da54-1a7a-4481-8382-eeb07a6bc9f5.json and https://artists.proofprofile.net/proofs/artist/a056da54-1a7a-4481-8382-eeb07a6bc9f5.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 0x0af5b97fd9788d01b08de11762852f1aba0a652ad00d9b55c96133e6bbbd7446. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:39:20Z), 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/ROROT2304680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186d67d96aa6f4146ed9d29d6e3f8f5e13e8d211a501b8ad742aa795d6b473ac. 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/CAHRE2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eea268bb7f5fb5d692a6f97d14958ad5eb715b48894df0901a0189ba8653bd8. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USLQ22180759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3b8aebefe8db1e70ce9dd32d653d7afb2ff11fe7273a4f1b0d346f68a40bf8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USLQ22180785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180545fb2ec38bbe32e5377966b580b51914b22d75d58a1169d4ee8c490693a9. 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/GB6LY1601169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180545fb2ec38bbe32e5377966b580b51914b22d75d58a1169d4ee8c490693a9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB6LY1601169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9226e50ef560a70c58cfdd95c409aaa3e3fbd231e3d695dcb5014783375573a2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFME2397493.