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 0x72cd8330fe5bc4cafaef8642949f6bb7d1822b1365171a0880654fa8e88da6c0. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9566944d-fd31-415d-acc3-209cb7d34dcf.json and https://artists.proofprofile.net/proofs/artist/9566944d-fd31-415d-acc3-209cb7d34dcf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Live at HIKONE (Live at Hikone City Cultural Plaza Echo Hall, Siga, 11/11/2009)
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 0xfbc61aa03ac2fd5e65b46077f0784155a11d1c3584f4d2e32c9dddc675039790. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMBZ92448605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca1b4dd054622c65e2b0f73b1efeee37bb2c376542408460712d6b4c53481ee. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMBZ92448606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3cc9d2d7df97bc0a98a676570a443e986b0021e024f9240b52cbdfa4f14736. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QMBZ92448607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27eaf2127ba7b581d50e0fd2792cf6e6b7438eb27e2684991338ffc2dcb5c959. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QMBZ92448608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d0c5dca05c7e14a74696490fa33c918f094a0da687c94767535c43813c6ada. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QMBZ92448609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3fc61d272768dde6e052ed1a00f301050819c07c9b8326b5e3d2b0155c5e8e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QMBZ92448610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312f16b9e29168f8435a3bf3bc4278451e815d5ace5feb06574b862037199fdb. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMBZ92448611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2671a64ee942cdfe79706f60e2c26407d957ee1f09548bc0a2cd0d2ce8d5b434. 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/QMBZ92448612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312ddde482e79c161762429652c7a173f97a47534beb331deb0a0d5c29ad3918. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMBZ92448613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9c5ecff4ba134cc9ff54da57dc3c521efd4935918cbea4c292ed68fab3d9f7. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QMBZ92448614.