thumb| "Black" (dark blue) and "white" (light green) table grapes A grape is a fruit, botanically a berry, of the deciduous woody vines of the flowering plant genus Vitis. Grapes are a non-climacteric
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 0x165fade3efb3034d5ac18f90ecf5c1a6031854f84735986a55cd2d35de588359. 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/8360e0c9-7ce4-437d-8527-9f2e24e082ff.json and https://artists.proofprofile.net/proofs/artist/8360e0c9-7ce4-437d-8527-9f2e24e082ff.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 0xb3b6e45b4b90f2ad23b7dfef635c2ffc0843796a6c47fc44abd17865347883c2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPWP01671388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd71e75a72cba78db88e29b369ea9680716f466d4b6299f00f2ccbd169201bc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPWP01671377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ee8800c12ddf64f2e8045cd65b44e192d78f7a51930e344fcb5b5984b94b85. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPWP01671378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2994b93e885c5f5f6b47d7f9db055dd8251760894dabf6f89c61feb3392df19. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/JPWP01671380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6929cbdcf1c93c36d07d36d21490e5e529137fe0afce3d9b00fe75c9bb12b5e9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPWP01671390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71450f083271684621213f884cc87f409c8f17b42311fcccdd8b4a02bcc99ef. 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/JPWP01671392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bef66ff2f5e8b0846f50f07e0404ea1dbffd58520ac8181ac74d5e693b49c4a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPWP01671399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebbfd322edf75455e68f9bedca6b3bbe02bbbb612ba61a850b1986e67a0a78d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPWP01671401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad154ed6c6d2df739102decc5392d85913e8fb5d8263f45eeebb146fbfd9b144. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/JPWP01671402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036d4343427334f1958639cc0d94ef83cf6cb2273446d57ad18484db2ea3d58b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPWP01671406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3048a649b91535aec7083b16bc06b5bedc6c2d8435b1ff79e897ca6ea3ed40. 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/JPWP00401908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3ff86af078d81542a59f2fe575537b7cc7beeb191891c5387762708a30bcb8. 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/JPWP00401911.
フレディもしくは三教街-ロシア租界にて-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e667ee200913aec57223fe7a6c2be21d9b6b560a4d52175d2ec80a0716078d3. 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/JPWP00401912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa7b8d77bdd3e57fa1daded3d6d501e2105bf3bd98471ce15f9d5d1f312ab2f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPWP00401975.