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 0xd98126875a853b3ffecb4be3ad06c66e88f58ab34b078c1cd19ee709e1722b4a. 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/669be022-5f3d-4478-8f6d-2cb18e55894a.json and https://artists.proofprofile.net/proofs/artist/669be022-5f3d-4478-8f6d-2cb18e55894a.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 0x65363c943289b9b6eb1c8003bdda4139c1fd13cebfbcbe14285e851830bdc71d. 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/JPC841100410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb133e3c800be725b8e66cb4a0dfed1017ac75804034c3ac4dbb33ed9927f4e23. 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/JPS801405296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc89a8f5aa427b86ce06db9464a71c484b7efdfeaa40ba696a6a2a68ef84c57e. 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/JPS801405304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d29d6ce5179ee6b29c1411a73fabd520ce1d92a403ea3b450a23626114828b. 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/TCJPJ1925412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225b0ca1bf42aa55809dfe7c1a6b72acfecd10b7b03be81bcaeb8dce1772fe57. 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/TCJPJ1925422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a22906fbbc82c971a8d85678df8053e1f876494a98317b14c7f5e48f2ed3ad3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:50:12Z), 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/TCJPJ1914948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d00ba5c756279a08e358302db4c73f646aa925ec9558a9ec13bf3b2342dccf9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCJPJ1914951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf570c03de1c9b1adead738a366b873312b241a75a4ad1dfa5af58b2011a537e8. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCJPJ1914955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0416830a0fb71e4f345dafa0484729c716723044b29420c392d73c2a9fd3e98c. 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/TCJPJ1914962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f23acfeb4b50b0ba1a202682eba3fa56ba0272af8b61d1be06e3e5e924f95f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:08Z), 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/TCJPQ2173080.
嘘つき女とスケベじじい (feat. 安瀬まりな)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38aee2c888aae038ce69581227a5a68f4a4d6c4b286b62862418277cc3f3f10. 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/TCJPU2207936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e5dfca48e95e01912ef8774b322f1eb9966b66e379dc0e35aba5023d07054f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPA2468114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02452f77477b4fffef899cf634392322721493bddca62d4011b298b8aa1d7718. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCJPA2455411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6cf8ea52aa81f489afe59bc59c0265d466141eda3b6cf062a894ee860ef098. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:00Z), 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/TCJPA2455415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4ad062317e51cba0cbe9612fa4125ec6bbdaaad75d2282eb85d8f60e6c3a7e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPA2455458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb03eefe2b35de5573a9b22ed28c34e4f7e90dd9f0c15bca9dbd64d56821fc2c. 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/QT66J2558604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4e0a99f621dc8a94f38e72ae748786ecc6387a621892640adb193012989276. 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/JPS801838888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa937c44b77b4fc14834729c14c84390ac2c9fb6c71bddb218d6e8e7dae913e3b. 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/JPV502000815.