thumb|Nicolas Peyrac in Rennes (October 2013) Nicolas Peyrac (born 6 October 1949 in Rennes as Jean-Jacques Tazartez) is a French musician, writer and photographer. Youth Jean-Jacques spent his youth
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa5cdaf29244c5cfd06e3e020930da258fe0a6e69efbcd8fbbfac5a0891de58. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cb8a32a-338b-4f68-a724-04bb77d9322b.json and https://artists.proofprofile.net/proofs/artist/3cb8a32a-338b-4f68-a724-04bb77d9322b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c22e6662163b771eb1e085d8c2250b5dec4c4f8464225c191c16ba0dbbceaf8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRZ117407768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7308ab60f9c3952f5c776f060a8c07a09d370336c5911757c0197d9c43ae133. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRZ117501380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8696105c5f59414e6373904af4d54dcfb4f384bd3f81df8818dc1847833d1065. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRZ117507158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d682b4c028163904a0514176c15c6b13b7b48f95028643d97ce26f6eaf55cbd. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FRZ117605591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa8c01f9742ccc9081a2e5b562428d4956e499bc1ac7086ef1bd7db192aa5fe. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/FRZ117706216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280a66228429febec48cbface2e603e0f7f2fdc938db87072987d3dce8589ca1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRZ117407766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b779762143017df9d5997eac1deedd5701c422ae492130a705afa67d92e808. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRZ117407769.
Les amours secrètes (Bande originale du film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c22e6662163b771eb1e085d8c2250b5dec4c4f8464225c191c16ba0dbbceaf8. 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/FRZ117407768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7308ab60f9c3952f5c776f060a8c07a09d370336c5911757c0197d9c43ae133. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRZ117501380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d336051fd7083494015e709d79d2216b54314245391454a03fa564073bcfe0. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FRZ117706211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd345d5daf19b1e3abf87789dd7f5f405bceb76df613f76988e35c153e70719c7. 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/FRZ117806203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231ad6af16eb26ea338b04f6a3c4d87261636d9154622ad57afe79d0fd7127c0. 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/FRZ117806386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b13e839069cf69976b8997de7790545a8741f1f5c75300a0c8ac0371bda7246. 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/FR9W12323000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d0a07d084377c338aed0626c5fc59bc9ca6fec8cc95ae2a6603a65720c3321. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR9W12352135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb975fbd3ac49347f71bcfb0d6f8fa64455091334ee372c4ca69789a5bb9681cb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR9W12323001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcf62c36df90a97657e510080dfde6db6581249c9fa8e9418465d8875ef43c0. 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/FR9W12352136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258eb5813a0b1f8931bde21cc2afb488d57e19097ef38713228557a53184bd07. 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/FR9W12352137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765328684c65e5aa25a05837d2e1451acfc8d8a1d752b78f86add28d2e91ea3a. 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/FR9W11107177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b3136ff19e1e9589eb38d635408db02d8d45f1203505b4575deed5bd362f4d. 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/FR9W12352139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d15e0d560cd85620bf2e02c78a753b1e130147270e6e3c6d1fee1e0d33c335d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR9W12352138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b47a09cba9403e4b937827845b3c0f3d6df7327c32bfaa9a63403add96d644. 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/FR9W12352140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c26df329a26180200b7caa8dcd8ad3d39eb91176d254fa850fabacc885d943e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR9W12352143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bc9e9ad793d8d05ade4e533948ed74a836d4492e4c26c422f5b8d2833db84f. 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/FR9W12323008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f594be1237f6cbee75b4b8e70c476ac095367f8c1141c3b12b1edc5169fa58. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR9W12323002.
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 0x9c65bef328d7700636246479298400db3d894eb72b72152b22248d74539c9e5c. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FR9W12323003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b663131ad3b98150081d090d269419ea6c8fb0088b76064597a219558a9dfb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR9W12323004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae6132fca54890c38d6ebc41654500763fcb7434e5c52f5642f59d60fb2b4e9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR9W12323005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc400a35991e49d0be2e1c49ef52ef9f63cbd774dadd23bba6d8a1654742e3ec. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR9W12352141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a28392fdf9ca072f73c8336ee72b3a99e5b40f9dc64d8836299cf491fb12305. 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/FR9W12323006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5feb6e7f06435cb3d40183f3ec50974245689f28f1c63eed9ae8194f04b6de3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR9W12352142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce83bbcc477740896cda272687bac8c23f551c7141f34effe46b725bb67e6ad. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/FR9W12323009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b285ffa6537e342f0859894664a720d6aa6349cdd86f848dc751345ad3f9c78. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR9W12352144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc648b21b05f2d2a192ea0e119658b3112832ff372c1a063eedf1d1ae22ec19c7. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR9W12323010.