was a coming after Keichō and before Kan'ei. This period spanned the years from July 1615 to February 1624.Nussbaum, Louis-Frédéric. (2005). "Genna" in Japan encyclopedia, p. 239; n.b., Louis-Fréd
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 0xbc09fe2a70ff8514757b9b194f28d7dced4c707667549b6eb226c4d8883df108. 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/a0b7cc41-9d50-4ee7-b725-d312b05e5e07.json and https://artists.proofprofile.net/proofs/artist/a0b7cc41-9d50-4ee7-b725-d312b05e5e07.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 0x95206ed9810d80a8380563b432337c723f2a6c1fea638dca08da34e2c575ee87. 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/TCAGB2208584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085030f7da7e3c0f71377030d969d141ef696a6e8f5c88c5a717d39bc10a49a3. 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/TCAGO2219247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fb2f2c280ef70f2fc24de8a9a7d3e6d0eb5c7d7f01d76895704aace24fa5df. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCAGO2219259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c3a0163845aa91115e849a2ea9df755ed4f7ec62a6085d131ca88fbcd1ac96. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAGO2219279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd1d4272f97e182294c4053cd617aa7b2f11c784df3d71d045c92793a47e693. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAGO2219285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a900eb3206af881dda624859b9ef63b62fc8ceec524277ee2f98a2bef11c05. 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/TCAGO2219319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a30697e81541d9bc968b0325827fb6e935242a3f6c95ca424a0d258b1003a3. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAGO2219357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b08f4c51dca4e19cc7315285626f24a2d42066c143f6c288efcf1e45769b0ba. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCAGY2347552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7b324520b760bcd9e495f87f53d1c994b52b0359e0cb235cf5eb27e2b331ae. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZDA52451496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429e9a72fae70f9cb902273f159d3b4c0b665ab12ebd01417c4289157775b919. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZES52465454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe035450b0451cd5665f534d39ab8137cb3ab8236fb604eb2ff16d07e1136cb74. 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/QZK6F2404063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788e358236826b13146203bc038caa5cbdb6550d406545e9dee6cb118cb912f1. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/TCAIN2455594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2776d8ed2439fef43c445b26f41b8508c676a1a4576718729e0859f46c9497df. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIO2455639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce77ba962bdb8c13f2a1254f1a2906b88d5c11f2c5226786a4c626c6fd926a1. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/TCAIO2455658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c23b0aa02baeff3e94521cceff2036d8dace3072b85675127ff8a08bd22e39. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/UKXN22586328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36453918204fcd859e402bb146f7071641d89c1ca2ea2622ce7a97beada950a2. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/UKXN22586326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc966ec8cceea3a6f6a2b1c05b0c1ca276c9a8f438cd0d537c989332d8fe697. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWY2549981.