1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x18ea384e3de1cbec3859f43e49cc8ad2ba3e15ae61af23c16fa9fa41ec132200. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0cd102e-7c85-4733-88d4-4016a72ee1d2.json and https://artists.proofprofile.net/proofs/artist/e0cd102e-7c85-4733-88d4-4016a72ee1d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99982820fa85a321a8b46398f61db8967014ac208bc978aeb66bcb8e7648f17. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T20:32:01Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0y3bLOzj4nMDo6DOyxNqOZ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0y3bLOzj4nMDo6DOyxNqOZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35098ad61bdfcfee319a076cc0e2df859a09bd31d247373b762f9a5c6c72de1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2iKla5T6RkQSPNpPvz7W5a.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2iKla5T6RkQSPNpPvz7W5a.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5829695dcc255b24aab8942b1ac14fb4544f22107a4323c9f964dcf75f626c35. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/50zYv1NYBFue5b7kB3LE7Z.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/50zYv1NYBFue5b7kB3LE7Z.
{"copyright_id":"0x33e84becebcdd85ef9b064e8f00a7ea86cb75e44c970013bcfebe1dcfa222a65","isrc":"FXR142300045","name":"Le bruit des bots","registered_at":"2026-06-05T12:41:43Z","spotify_id":"6nlZKd1dRKstqyDh4kK6Q7","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e84becebcdd85ef9b064e8f00a7ea86cb75e44c970013bcfebe1dcfa222a65. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6nlZKd1dRKstqyDh4kK6Q7.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6nlZKd1dRKstqyDh4kK6Q7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ee1475073d68c6182a32320dc80a4ea1643d8067c9d267a1c188ceffada542. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7iYjk6VXRu3g0an5nsvSsw.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7iYjk6VXRu3g0an5nsvSsw.
{"copyright_id":"0x6e95f74beeacd19d8484f5f372423ba63342f23e308b2ef9a8529a3cf5d3ca9a","isrc":"FXR142300047","name":"Paresse saine","registered_at":"2026-06-08T03:35:27Z","spotify_id":"5KSt6gsd0mDyyvaRYOBy3h","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e95f74beeacd19d8484f5f372423ba63342f23e308b2ef9a8529a3cf5d3ca9a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5KSt6gsd0mDyyvaRYOBy3h.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5KSt6gsd0mDyyvaRYOBy3h.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0e00e8bb9a6372a99b8a079d3df9eec014df78efaabc294be4cc69b71f1d65. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3HljhowzBFYVt0boYUaQVU.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3HljhowzBFYVt0boYUaQVU.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99982820fa85a321a8b46398f61db8967014ac208bc978aeb66bcb8e7648f17. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/60ikrQw22p7aXuLK8gLKGw.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/60ikrQw22p7aXuLK8gLKGw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2aebeff985a960530c9c856576d7a57ee24388c9f07b8c0438ac371f0d035c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6PcHZ4yTbCTfa1mwybvxZF.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6PcHZ4yTbCTfa1mwybvxZF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eee3d0668416ce6e87a4a1dc9a295d44bf0a9bf966a454f1de9046f69f9e5d4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2Aj4VQksQMgr2Xsyu4OPuN.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2Aj4VQksQMgr2Xsyu4OPuN.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9c10300672d289beff947696483f981f4e6dffef403c9d7d71fd972d0bbc23. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6QoTaVsy4IfvGvEFqgq8mF.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6QoTaVsy4IfvGvEFqgq8mF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8f2f4c43a2657ba4985897987df50707dc136f02878fbe5ee8d0ec8244eae4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5y4odcFYKDhGSM21xf8KV7.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5y4odcFYKDhGSM21xf8KV7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffec7a35edcd0e58b1ac30ab0267681765a939cb771c3637550a0742145261c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2JGwzcg2OGvtdgGJOR8lRZ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2JGwzcg2OGvtdgGJOR8lRZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3596072e77ade88da65dd9ef4d5c9bc530539d4bb8e9702b3249577cc765fd52. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2QCcrbDMHCnpRu1YApyy2A.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2QCcrbDMHCnpRu1YApyy2A.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35098ad61bdfcfee319a076cc0e2df859a09bd31d247373b762f9a5c6c72de1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6ZY9Z5GCGTNDkrFBbv0jKc.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6ZY9Z5GCGTNDkrFBbv0jKc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279b98b610a58e533575b003964396b80f972d48577ec8d154fc5a6f20f16c48. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0xqoer7IeGfnpC09uSLUY0.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0xqoer7IeGfnpC09uSLUY0.
{"copyright_id":"0xe4325f283e80accae3a3393594cdd869a964768ebae1bda66d71ecfb6b9e09dc","isrc":"FXR142300058","name":"Pioncer mieux","registered_at":"2026-06-20T06:42:24Z","spotify_id":"3lAzC1j49ACSODHHMmPmk2","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4325f283e80accae3a3393594cdd869a964768ebae1bda66d71ecfb6b9e09dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3lAzC1j49ACSODHHMmPmk2.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3lAzC1j49ACSODHHMmPmk2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71b998b2a9d18f6cfa8ede6186a43b0605d7097448da4b58db849b2dd85edc2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2akYDBckx4kNvw6ke57xe4.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2akYDBckx4kNvw6ke57xe4.