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 0xd8e21c3983687745b8c40731d6695c4f40a17595c5d6094cce1d0d1983f3c24f. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fe47f66-77c6-420f-8695-b8a65e54b171.json and https://artists.proofprofile.net/proofs/artist/6fe47f66-77c6-420f-8695-b8a65e54b171.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 0x803fb81384e85d7fc448c5e37c2f992e64c232d12aec228611d098122cfb5c64. 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/JPZ922003463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514171b3b33e0d9c9f15587f04918f744d606c4d72c095605a034e864765275f. 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/JPZ922003465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb6d02f21f658d113a5dd14a613a8d65faf3f702e8ed64b4125e0a7949ad297. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/JPZ922003466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b9729786f4e264320c8d3469d68b46b47ce3f1c0cf97e26b5a4e5b2f364af0. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/JPZ922003468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31aae06d253f27e2c942b3508af1067fb2296e2c0ebd0210f168ce24a425126. 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/JPZ922003469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873500bb5669269b8d4d1bf253ae162fd0500642705363a565503c458ba992a2. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/JPZ922003470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d78e549a85436ee76c3731b97892d90b109b3a3016fb61ee6fb709bfaab884. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPZ922003473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160e74ca98278b160a90ed7ece225ffc75773515d1bc0e23f80572d0da568c3f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPZ922003474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd47b69508a95b67f34fe86ff2408426618a155f4b0ab2e7a8999f93c2bcd0c1. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPZ922003475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc06fef1baa95707dc4230ee62d8c4fbc190c3acec3910f0a33af4be3f52293f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPZ922003476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a03a14ff37a5247fd6e1c6f8476cbc696772f42cf61205f828c89f5f47aa474. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/JPZ922307515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a87a0a091fe47a2a9f400f33bb750575e5d851816b647e57c3cbe3418604ee5. 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/JPZ922307518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0a302da809efed86e82738223f5ce1d3e704da8260bc5bf34cf8a8f9fa9ca6. 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/JPZ922307519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9860609cfb3da9835e24752eeaa510cb52621b6dffc8a125f25796a92ca5cd01. 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/JPZ922307520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedb59993d49f81d39258b9701aec6de9aa9abf696f31a49f419c2362a13d631. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/JPZ922307523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5aa41b711891f032ad9c467cf85c47fcea26e93b73379a1ad12f5468d9abb20. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPZ922307524.
Utakatarelation CHUNITHM Original Sound Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd8aa36a9bbdb96beea015998d1ddea26da86d1a3aa7277a42519e07717b7bd. 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/JPA651503255.