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 0x7410dc620cfc324696d2b1f36fc10b6137972ba91e43fa20c6c7d7fe826d1023. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/888fc18a-45eb-4729-8b51-ebaf596dc175.json and https://artists.proofprofile.net/proofs/artist/888fc18a-45eb-4729-8b51-ebaf596dc175.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 0x55a1e02bb1c8350bea2b7098775702b95e1483e628a125749c6ec2c337af7d07. 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/JPPO08400850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d749db133d521f204f2363627cf76874017ebdac9e634afb6d0042417c7cb93. 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/JPPO08400860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44560be0035a58e8619ead999a426a23e9dd1a61fc44ea0da5450085f27d00c9. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPPO08400870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9d716020ccbc6cfeceda00d0a32383bc2c88ff0dc0c27639f4b2497458aa16. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPPO08400880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783337933906d3e110984bd84995a9d94210e45f1aa1e25eaf1001f97b6fadd9. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPPO08400890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaf183bc45cfe4a6ae242e2a29dd1e3e4194db9109f18ccfea162901be49667. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO08400900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b231221e3d3514b65f981c2a2b13be484fcb26227bdb868e7466937d64f319. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO08400910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3165772feeec609ef2712cebeca3892dc3a61b3a0ae42d8ede12412060ab74cd. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/JPPO08400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac085762ced2c2e26a08e5fc5df0192a39b6376bf51cbb7fa44b67217443461a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/JPPO08400920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09da9e405bde8a962105bd59b05cb50cf94892df684e9ce475e038865a15f45. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPPO08400930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f73ae68de4f36e1dbb1c907451098d7d9d089632cd5db31e82801ca6563518. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPPO08400940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785d9588cae069c56d4e6f2aeae764e6827aac536dd43bca8d24e7652366d99d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPPO08400950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb750de131fe120fd06b069b2ce4f62ad4147b6cc460a861ea5e3c97545cf9ab1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO08400960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5724a276737737fb5bf4dc6f59af6508d817fbe07df9379d0ec1bc610af07d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO08400970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123e0db87e6e41fd2575e3aecadad6bc04f3055f34a7865c84d19542eb053111. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPPO08300710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6099c6d6198582ca7f348a21f6f3a276d3f70891e8f57eaf02129d41dfafe53d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPPO08300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c560221be81c9aceb567f75361342dfc1028df1b885b74b2846d09ae5f9099. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPPO08300720.
ゴールド・コーストのクリスマス
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caa4fc7fe96e8ef36cd2d0e9bced231132a99cfa7bb8aa9c22a960a6e29944f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPPO08300730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2639ef8d38f3f825bf0c1773a5a9d5fa1f7d1f1274de9e723f93a848f8cdb9. Chain 2 (Bitcoin): anchored in block 957242 (2026-07-09T01:00:33Z), 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/JPPO08300740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29e77d9c926acd92531884f3716d9465a8ed269c379810404a081132726031a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO08300750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d59b70563cc55397fdb97ebd822a7e186b95a2dea2a088c3884c41ff07a142f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPPO08300760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63252b33ac978f40f2d3682c1f69059624822067e333508482a65b10daf5063f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/JPPO08300770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c753eb2e931bf6cf13fedc47fb97c68e78c2479eaa670c4b49fc71490804cf. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPPO08300780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6907a6bef6c274bb125ac166103bfab7bf35b7a8302ed071c7b96faab6d3f8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPPO08300800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990d0f34b1c7185469824bfa137e26e363dbc93bbf1bb60a4d6563eb9098ad53. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO08300810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305852adce13a9ef0b575f7a6018701efa3afedbe2097d23356e8435d16e3a2f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO08300820.