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 0x80b60a1f064e6bd5056911653931c1cc1998afc810f24688f14273ecf65e7892. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c53a8cd-34fc-4e6b-814e-24bf1308fef5.json and https://artists.proofprofile.net/proofs/artist/3c53a8cd-34fc-4e6b-814e-24bf1308fef5.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 0x5a03a7f79656b903b6cd3ba68ec49eb4d12936a96da5a24a324352401d874161. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/JPZ922113700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28a5218aea760668364800d7c3722afcde24ceb4b7a4c2bdcf0bb98a1d40b39. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPZ922105864.
Relay / Boku-wa-Dotemachi-no-Tokeidai / Rainbow
Relay / ボクは土手町の時計台 / レインボー
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c8bb7c5a47a6f6026d66610b76f26654fe16b08b46e1cc781d30b8ddf74c11. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPZ922402404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fc1d2043ba133c4a3c88803ec630de7523afa9f0de40e814f117e9a68fe6c3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPZ2413869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09044e36044b61da9da72a6c785721878f2908a67a00b68f0f11c6a92a8d6f0e. 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/JPZ922206876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9268cc1b94fbedcf6feade97e3344b590a78b3499bcfd5008f44ba2fe22df390. 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/JPZ922305216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4426813c5e6b9b75ae70a608ccc9fbd54432c9ed8af1d57ca308a442224e9589. 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/JPZ922402405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033038a655026c63e3667702e765d5ad952b3356079e98f9ac9a5f0fef756ab7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPZ922407188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78176301f9bd7d855651038d67a84bb766fa43e4d834d6d6f6113588f535f9b0. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/JPZ922407189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571b90ceefbd4032706dc0142f6da5ba4b1c21245ded4e04a3fd66e5d7677f62. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCJPJ2585702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bde3ce8f3af9bbe249dcc918b5fd18624b80843d90d0b46dbb8735723ccfa58. 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/JPZ922505566.