Mayu Nakazawa (中澤真由 Nakazawa Mayu), known by the stage name immi, is a Japanese electronica singer and songwriter. She is signed onto DefStar Records. While she writes and composes her own music, she
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 0x19feac82eb5730436a3e19b3147f79951f8805d80eb0f9a70e72d652c155c67e. 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/416d7042-835e-464a-8ec6-ba0f97166e48.json and https://artists.proofprofile.net/proofs/artist/416d7042-835e-464a-8ec6-ba0f97166e48.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 0xbdce080f8935f10a9fb2965f570082a8c6d35937f007e89fe95d3d15fd70aa3c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEA622001324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedc00a93ef6349b98b1d7981d8cdb04b4df967a82d4946f19784da7ae8aabdb. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/DEA622001526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdce080f8935f10a9fb2965f570082a8c6d35937f007e89fe95d3d15fd70aa3c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEA622001324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad5933ae27f2a505effc74a809bd0cd752f062c3fb29574253fdd5746e5078c. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEA622100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc551f43e1c609ea69f74e0d3fa7b57475af3783d6f74dd2a918ce2908c1d38ed. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEA622100488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc551f43e1c609ea69f74e0d3fa7b57475af3783d6f74dd2a918ce2908c1d38ed. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEA622100488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a4e782bdaaca2195a5f105f763d62097074a207fc4f73d7a85ef533e91c66d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEA622100701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a48a149c49b56e1ffbecfd69d1b7f599395bb98ce4a6fbda6df53d46dae829. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/DEA622100559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4360569c80a977b3bd933fe36687808e924503bf8fcebba402319486ca655861. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEA622100923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a4e782bdaaca2195a5f105f763d62097074a207fc4f73d7a85ef533e91c66d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEA622100701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108fe4ce35cfc95fefa10af21aff5d88fb8c774aaaa89d4d3c8a7c3c119030e6. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/DEA622101206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad5933ae27f2a505effc74a809bd0cd752f062c3fb29574253fdd5746e5078c. 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/DEA622100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e829689437bfc523bdf0fd88a268df9fe9b4d46ee7339f94513b62cad63f7d7. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/DEA622200242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe06b329b1e2946c3db7b7ffd19814660d144d36a945cd8ff21ef48699e05782. 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/DEA622200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108fe4ce35cfc95fefa10af21aff5d88fb8c774aaaa89d4d3c8a7c3c119030e6. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/DEA622101206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91482bf29e67712c8e760c7d28dd71a4ccdb1caf9286252444ccee3fe58ef4e0. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEA622200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe06b329b1e2946c3db7b7ffd19814660d144d36a945cd8ff21ef48699e05782. 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/DEA622200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1634cd895c178a81a48914f1b0726e09c64ff69e9f726d037cf9b2233d52573e. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEA622200472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91482bf29e67712c8e760c7d28dd71a4ccdb1caf9286252444ccee3fe58ef4e0. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DEA622200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb625270cdcbfb00cd3244fd5e22ad340dd5c3503fcd501be1444c2d972078f9a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEA622201343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb625270cdcbfb00cd3244fd5e22ad340dd5c3503fcd501be1444c2d972078f9a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEA622201343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ada73b200b10f35e88431730bf6d58bdffe4501b505eb1888b75055ae1e995b. 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/DEA622201586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fb5c75994507138ba14810416aa35b749442be52ad3095bdd116ed29de2b72. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/DEA622300465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7773a4cfe4e288a4057c04e40a2afc925a4cd3f1675c4a128ddffd73d84cce1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DEA622301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fb5c75994507138ba14810416aa35b749442be52ad3095bdd116ed29de2b72. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEA622300465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a313ee057ed5a9207c684ad9640a2551c95684c3cd2389ca5956085e99c7a1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEA622301589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7773a4cfe4e288a4057c04e40a2afc925a4cd3f1675c4a128ddffd73d84cce1. 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/DEA622301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90c8ca6cf2b1aab789598ba6253a3b923ed6d432d0d392a5b266efb601eb17c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEA622302119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a313ee057ed5a9207c684ad9640a2551c95684c3cd2389ca5956085e99c7a1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEA622301589.