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 0xb306b0c4d44e024569c1f9161f524fb128694e294baf707e4b4dc5c904e233df. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8caeadd-c140-4622-806d-f8b33a1ae72b.json and https://artists.proofprofile.net/proofs/artist/a8caeadd-c140-4622-806d-f8b33a1ae72b.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 0x0257ff4f8f34ec977da186039f6051959297cce7cf6f57bf18e103740d6e419c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO02001832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aed01a3b9353b3e847e2fee50aaccbc23a58cdb5d6e6bc74fc12b88828979cd. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPPO02001325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139c60f4ccd2b66abbf90d155f4a4fadbcbf33f2dcb4db814a6422947f5c7d27. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO02001937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c42844ee2b8028a459173b354a54e84e8cbd5ba3a483d9706efe6a70979198. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO02304467.
赤ちゃんがぐっすり眠るためのヒーリングオルゴール - Baby Lullaby for Sleep -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b46f84bfa7a74a7f205b7b0b41c94f36017879357fc1c3bfaebb192674e6085. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO02301821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a60ebd57b31d2746d272a0ece02f4fcd3d3c6f52294e9beb865b88177c88ec. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/JPPO02301238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9497686c0fef54af79a509dedf22576160ee9d0133fe6b69a17167862e5ca4db. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/JPPO02204592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed35e332bb0e7fab71efab09f520611e6b3e3b86184fc9e82e2474ca099d727. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO02200526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56728fca6b6a46dcffc0682adc771a2e27c28767ed5eaa9cb9ad9da560050b6c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO02103798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aac8091c96c71aea08ad443115bd52bee993fbcc5aae501662d44ad532d1f8a. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/JPPO02101078.
ありがとうごめんなさい、いえるかな？
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0257ff4f8f34ec977da186039f6051959297cce7cf6f57bf18e103740d6e419c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO02001832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aed01a3b9353b3e847e2fee50aaccbc23a58cdb5d6e6bc74fc12b88828979cd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPPO02001325.