is a Japanese multinational electronics corporation that manufactures electronic components and recording and data-storage media. Its motto is "Contribute to culture and industry through creativity".
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 0xd3c0ea02c5963a3440f3965a98eccc6008d99c26506ecca4b05e196bbec56bdf. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f3e0ce4-2a63-457a-b11b-a2a9c003a657.json and https://artists.proofprofile.net/proofs/artist/0f3e0ce4-2a63-457a-b11b-a2a9c003a657.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 0xdf3a6e7138527f4a6ac73211202408ddab0feb67e2d07932fbbe02a1aac753b3. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZ4JJ1797397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5847125f1bcf872b47eaa52567bc53d706f8afe3ac3ed66963d4b8417e85882a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZ4JJ1797398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16653d5e506eef396901ff26a4d3571a5a26bc8bbf241c17ef8a418dee7c6490. 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/QZ4JJ1797399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6181e4cc22b01a939f1d7882e83d0d0ac2b2004b6de5ab76f7f3bd07265e01f8. 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/QZ4JJ1797400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48f056daf1094fd0471193648c49712ff2cce5188e46045639dfe8eb270ba60. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZ4JJ1797402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105a2469a97e5e7b4477615e280ee0ab81d45aa7201ec1cc5022e1433e0d2c3d. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZ4JJ1797403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4d2da98dd973c3200cdd57ac17444ef89b6ed31f092fa9538f27f0bf1f293a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNC1915217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d920530c614ae576d8c34118cf316aa13ebc4f0b5a85136a4ef4c0585ad5c3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNC1957439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c65a820a402c38c9c1dacab6947af1849d1cdcade932177a2ec5fd00fae390. 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/QZHNC1957440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa419c73ea8df5f30df8764d20635137642400bcb9d26b11fccd2e770be1ebef. 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/QZHNC1957441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe88cd176b5e50c3637bbbabdad7c69ad97314dccc3adfe4393024933955481. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHNC1957442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb15998ca31e815c85317c005b401fd8b32c10083132e258a23ccbeba11795a. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZHNC1957443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600395b78e47be032a16d401809f5e60573a3a9b4d869421ede5592c8845cffc. 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/QZDA52314092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acb83db26d81c9d8495d2e401709df2d5155df451ed971c6bee68d4d298e951. 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/QZDA52314093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101f3ec90d06133d0df15d2758064f7832ceb9519de4cd6429cd245c4406215f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA52314094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa952e828510e9a08c565188e1b78b0d9e8333a5b193882141590478fd2f94897. 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/QZDA52314095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2831955f935ad62bbd1f239ee0d57ac05296a86dbf3a37586024c27d9ca97c2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ62511940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d2bb879af6783827287eb8a2d8d313d51ea287ed1e9d7b425933a1b6fa14bc. 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/QZFZ62511941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b76c978d026d95e18696af8c721f10fdfb4c0bdfa36eaf5ba3d8515aac98f81. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFZ62511942.