1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092715272ff19b3347ef456ee169a84de64334df5d64c1716fe2fe1e3c003a87. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6027aa1c-1c1a-411e-8ce4-4c37557f46eb.json and https://artists.proofprofile.net/proofs/artist/6027aa1c-1c1a-411e-8ce4-4c37557f46eb.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 → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e09851c28d284e24dfe333d8f092fcd4f9e29971aeab7fffc728353f4e9e305. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPB602103481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141bd19760606a4ca1a049f1436cde3763e379adcce9b7325114e49f80c5f662. 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/JPJ592002315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0905b09b2eedd135f9c15542262351e81dcd345ba1103650ec7a8c043aaf2f. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:13:28Z), 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/JPB602201956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c929e46155e3b20cb95a294d531c64ebe8977d3b31396af50b8070710ff8ea7. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/JPB602200888.
ポケットにあの日をしまって (feat. 堂村璃羽)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf5a0066c58f67ca5a50d8c479271afde8e58430b35463d8ec8700bf68d9c0e. Chain 2 (Bitcoin): anchored in block 957648 (2026-07-12T03:52:24Z), 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/JPB602302264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf5a0066c58f67ca5a50d8c479271afde8e58430b35463d8ec8700bf68d9c0e. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/JPB602302264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55478384370be3922864e9e889c0ff38dd5e9536248b83a9f337519001a82e6a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPB602201490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141bd19760606a4ca1a049f1436cde3763e379adcce9b7325114e49f80c5f662. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/JPJ592002315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42130777004c853ecccd31d65d849ff17e6ede94135489d461408d5b12b6357f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/JPB602203155.
わたしのアール / 命に嫌われている。
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0082dc350a8da6ba42a8e2aec8db111822ffd3c0b0350909fdfad4d31c1c167. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/JPB602303787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d658e8f16ec405f5361704b7664079c6cb49b2c4487ca7a4c364ed3e081aae. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:09Z), 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/JPB602303782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbf2a591905624ac122bae3192367c8446c4cc976888ced638f989ad8c56c99. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:46:31Z), 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/JPB602312652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7736de29c8b9bf0103506f90dd5a85ff90f90787b2a8d49ec8b82c7001e22017. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:31:52Z), 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/JPB602500464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6d0fa9d5996c629f8ae24badd6fa7ea1e33aabc456257d494d4dba23375bfb. 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/JPB602502906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a775305f35ef9fe683c6590b47315ae8acd473e7ca1a541c5740f9d3ab432a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPU902200169.