HH may refer to: Organizations HH Electronics, a British amplifier manufacturer Hyper Hippo Entertainment, a Canadian video game company Happy Hippie Foundation, a non-profit organization founded
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a99e87a4b6fae8a1abf1f14cede79cc226f53a9b6961183b6d193583f3634c. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f517bc0-ef94-4a31-8eb4-74705b11ca56.json and https://artists.proofprofile.net/proofs/artist/3f517bc0-ef94-4a31-8eb4-74705b11ca56.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198cc6d043e51f34e65bc5481077469c421d0cb01e9f7c3294623ad90de4d9d9. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NL8RL2509869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3683dd324b628ab32375c808652ae27a6635e4634242c03638d8fa76c71e097. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/NL8RL2509866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3618d4748e25bb655547f5edffbfcf7a4d180728fdf19264d3a09a4c016480. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NL8RL2509868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f27f7f4120b0fd02a459f5829a348894a570732cbbdbc5010e19d4a931cc1a0. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NL8RL2509867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fba4d47c207362911153a151778aea3770e77ef49fe9bdb45f178efd7cb888. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL8RL2508450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e3a181937413f5332b0e498fb396fdcdc6578ecdd119dd837d127f27611184. 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/NL8RL2509863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8c83fce40bac29c9dc21fdd909fef1bf17d32d36b46342eaeca318584dae45. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL8RL2509865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fb18314479d8764b25cfe6111778ee6da15a469341d4919f9785f7aac2dac1. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/NL8RL2509861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65dd6b09b5a623a33cb5723532592d09fef4d72244dfc104a3556f4402d2936. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NL8RL2509860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27c051ce99106e1227a9fe30e6475c8e6158a003f89ce65454e7c670241d736. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL8RL2509862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3d24872d3e3af163af2911e0029fbd11f8eeafce82c5ae8df242791835cf5a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL8RL2521289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86452278d1b8f117d72d3813bb884bcc0bd435b201fd408723e958dcbb096d8. 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/NL8RL2521288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2977bc3e669d7a74f8b91f4e106b6dc59901a92ff4dbfb5f61789dd73283584b. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/NL8RL2521287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198cc6d043e51f34e65bc5481077469c421d0cb01e9f7c3294623ad90de4d9d9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL8RL2509869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3683dd324b628ab32375c808652ae27a6635e4634242c03638d8fa76c71e097. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL8RL2509866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3618d4748e25bb655547f5edffbfcf7a4d180728fdf19264d3a09a4c016480. 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/NL8RL2509868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f27f7f4120b0fd02a459f5829a348894a570732cbbdbc5010e19d4a931cc1a0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL8RL2509867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fba4d47c207362911153a151778aea3770e77ef49fe9bdb45f178efd7cb888. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL8RL2508450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e3a181937413f5332b0e498fb396fdcdc6578ecdd119dd837d127f27611184. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL8RL2509863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8c83fce40bac29c9dc21fdd909fef1bf17d32d36b46342eaeca318584dae45. 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/NL8RL2509865.