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 0xd02743f8ad9586347ea6947d5fe45da12cc235bd97b1c5212fddea4b0dac5438. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2a36032-2859-429e-834a-156dfc29c7a1.json and https://artists.proofprofile.net/proofs/artist/e2a36032-2859-429e-834a-156dfc29c7a1.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 0x4131e547e906e3fc53d56e90538b91ff5fc5fd0888f27b1ac09234a13dbaa02a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/JPJ901000670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d2658c454f08e1dd541e2b901d58841ba5987cb4ef82d621069b6a375f9596. 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/JPJ901109940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0d20375b6767b23d4ff8b5721a098a228e04216280386d7f894ba1ae80a5f1. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:23:52Z), 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/JPJ901110000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a86dacd374a5afd6ee67cc3f7ac6a878a2941247794c3466d3350710d30efaa. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPJ902104470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f894e05958a40cd6c79f6d40c05c8619045d13169002913f9895dcf07bddc03. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPJ901417030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4063e131da57ed448d17d1320797f8306e5e2785b2404e65294962b7dec175. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/JPJ901416900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ba027a5430041ecfe9998102ca1ac62b7bf044cff60cf15b8b0e55b6933cdc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPJ901416930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1ceae9378137610ba8b8e5a1b219f45811d34cf3f972093a0e402ff27142b9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPJ901416940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b7647c9a3300fb6cd0bf5443d5d2b8c0d7bb9e7e2b7cae177f9105d2e16344. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPJ901416950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cf3e63baa79baf1b3d25d42b09c9ad4f1cea0477f14072b53e3edae20d6388. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/JPJ901416980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035cb993b8cb0444ae3488e1ddae73a2f09d91554f63d643d30607d53bdf1c41. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/JPJ901416990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bde4d937b66da1855f89e8c2b25c2201c90f5fdffb53aa0692dad33bab8d65. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPJ901417000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75bd54d6294d000e8cc85483ce0d3b3b1ea0fb4279cb3b6f054cd2ea24107d6. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/JPZ922206983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea7ed834bdb353a6f18fa2b53d9fb708847855238ea0642e04836754234d6ad. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:30:09Z), 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/JPZ922206984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec45c7970b661b713ed5f9cd2ec02c731ca31dcb88009e223af42baf4dd862d9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPV2380797.
Love is on my side (Live at Koenji HIGH, 2012)