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 0x75211eae0e795df2cca95f9b771d6cc44f6488c8cdfb8de3ab9546be8d876b86. 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/de96eaf7-8f81-4bb8-8ec5-fd1b7e919600.json and https://artists.proofprofile.net/proofs/artist/de96eaf7-8f81-4bb8-8ec5-fd1b7e919600.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 0x3658cc894256e8ea255ab4c63547d711b7eab7219479138caf25a41aec6e05c6. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/JPB601850880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa384723f4bebafc8415c54b2ae6e760e591805fdf5fd77c2ba3f4592874d2d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/JPPO01805414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547e6e63ca7e51246f21ad85f1dfbb7c45116c082cba6be0e795f92623c8cc59. 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/JPPO01805415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627cf8a4b58d609660f09aae2bb8ac3a89f7463cdf6ac06082f3cdffcfc66d77. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/JPZ921902063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aff7b76cfbfdd5d6f3f9ef4f4267c9961cdeaf8ca1b8e70906757613301653b. 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/JPPO01805416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48d5181b0975ece7fef0538e9b5dd0efeae1c97c5fa0b0e583e38615b580761. 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/JPPO01805417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d66b3c5cc98a80e8b9dfeb62721d32cf28ae8a510b0f0a2edfa561c478c1e1a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPZ921913399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48583551acf46d40ecc445f46379c11a308fa41e46f446a6b308688acaf9cdf9. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/JPZ921914299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894f962a0a8b87e395fc2a0097ef7b085ed9b10be056f0a642ee3a00dc094571. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPZ922008366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fe7fcc584a4747321598d58342742c4ad10cdc1133c46dc76bcddbf4549841. 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/JPZ922013073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8ea1aaed9032b44087dd8614f560ab4bf0fe5f56d835c7ed0820a9a822d5ab. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPQ2100670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9532dda928fb538b815016f8c350506b450d6d471acaccade29d8012dfe5a69. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCJPQ2151798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59aabf8ea169e608e43f211c7268942acea3cbfa80bedc3422c50f503fa655bd. 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/TCJPS2237935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f9410a4bb9e5dde8aef32f47b61229d45fd2623ad45255e674b28d2f0fbc46. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPB2421809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aab2321b3a05e717bb98e89fd63f4ef9b5cd46b62042b1c4447ff62a009836. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/TCJPC2450161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68b1070026dd28828de49a76aa6a11344a26e4162c416bd6caa167fc83f30c2. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QT66J2596274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5c2c1607b386abd391dd0f878534e40631881945d24554683608b1ee44ff0e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMFME2337160.
トロット・ガールズ・ジャパン 準決勝 No.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8730990219655f473d8f8c02fab3c8bf4f94f6ec4679911dc7912b60d682fb8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPCO02401730.