Masanori Sera () (born 14 December 1955) is a Japanese singer and actor from Fukuyama. He graduated from Osaka University of Arts. As a singer Sera's rock band, Sera Masanori&TWIST appeared in the Kōh
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 0x9989a9d132421395dccd08b5c7b69c41d3b370804577b9e2e2630e9298e2ac8d. 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/75a8549e-cf5d-4407-b29f-2da135785073.json and https://artists.proofprofile.net/proofs/artist/75a8549e-cf5d-4407-b29f-2da135785073.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 0xa83aab31eb5580c7a7323b9ee91d8d7f05aaebbaec2821f9b1cebb7d67a14965. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/JPPC07900990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16563edcc52ba46494389ec141d33f27b44e3506a659e096811996c496106416. 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/JPPC08202780.
別れの朝～世良公則 バラード・コレクション
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0e2bd20c3fbe1e4d0066ca52cca2d6fca16ae6a47fcdf4685f996cd753069f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JPN900802110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cc7a0762119ddc424fc79e4d962dd207e717146068050d4851c3bda4c30270. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/JPN900802130.
ポプコン スーパー・セレクション 世良公則&ツイスト ベスト
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c420f04cfaed218d69735982f3ecf8fe63c5cc09d99168014b0b7be20518929. 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/JPPC07800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87064e3380e7407bbd063a6e94edde31d3b6a53be11c8ef776aa67703b00fd3. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/JPPC07900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d88773c1eef593c1925f6934944ba431a1ab8568bd4e0d0a9a15757fcc6a843. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/JPPC07800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400baf3cc07db7ba87df2515aaeb3315d2659adf491a8df755d2c3a23ceb0e2c. 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/JPPC08503080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c4d4b002852498a28b93a1640b6e38bbe22fa545abcc9ca4399e096e14c2b3. 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/JPN901201460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba4b08bf00061b352ae1627edce1461365d3ab92c304f393b16882e1f5f3cff. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/JPN901201550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3c9512a14c12884dfe49e6461a7ebbb1d0536576448b92c07cf08553131540. 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/JPN901201560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399f2ecf1982a65ff7f308a2604bbb38afd40c26cec9c8f0a7e033cefde54eb4. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/JPZ920703338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc581c068ba71d3ed73d295df5f9ed74a91c2cdf12da07904791a83a2394d123c. 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/JPN901201570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c2714f01cfceb795b342aff8de545dd399ff70165c0412b0ea3b8c3dab208b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPN901501970.
オン・ザ・サニー・サイド・オブ・ザ・ストリート
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed1db952fa7eac3460525d80084f97696d013a61c830bcd5e9d237647077919. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/JPU902301525.