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 0x41fb41b703d5115042d4678b6bea1dcc209e0ab7ec636b535a81346f23963f9b. 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/fc481a92-d080-42b3-93b4-df453100ca35.json and https://artists.proofprofile.net/proofs/artist/fc481a92-d080-42b3-93b4-df453100ca35.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 0x18e5e3f3dc97c55d250e287f16bd794c23f1f95353120dd62ff13697333df51e. 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/5fjFdZXoZuScQfjLOqBbmp.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/5fjFdZXoZuScQfjLOqBbmp.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1963e6e1a1c0f8c50d73b69d6260a72a9a765611b51e5db1e5c014665479c70. 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/0B6En3Nt32ccXaKJbzWJ5f.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/0B6En3Nt32ccXaKJbzWJ5f.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47724783d20f35a27b22107e43a58a65110e274712731f2a83bb985fb997c10e. 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/3OZ0TuKNRSdCx6Qd4XHWLR.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/3OZ0TuKNRSdCx6Qd4XHWLR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83708bb6e1ec5c818faf31ad35abc3286b9e5f3e03f61a19a81791a65c5fa99. 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/2CD6JNxrhMF2EIX3mWJzvJ.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/2CD6JNxrhMF2EIX3mWJzvJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d667e2969eef54f678887923b53553852be6ad99d9e3e58d3787731143367a7. 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/5JCfbsKIQMnFUwbE9teZ3g.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/5JCfbsKIQMnFUwbE9teZ3g.
{"copyright_id":"0x6a9d0aae55ea42574ee8cd20870c2b5961cd0ad1d9fa5e79d558e12e8f59d443","isrc":"DGA0R2332679","name":"我的心下起了雪 - 抒情版伴奏","registered_at":"2026-06-27T20:27:10Z","spotify_id":"3WIsN8hXKLK3mU5ordvox2","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9d0aae55ea42574ee8cd20870c2b5961cd0ad1d9fa5e79d558e12e8f59d443. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3WIsN8hXKLK3mU5ordvox2.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/3WIsN8hXKLK3mU5ordvox2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6875710bd21adfab3ab5b688a773d7f426e3db18ba24f8bb366f789e75def45d. 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/31Qi8TDyCT9Z4irxDftoOY.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/31Qi8TDyCT9Z4irxDftoOY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc3a35ff3069372ec3eb51dc06a2e032df033fc00db958dcb60e375373f5920. 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/7t0gURkbaHL7aF3mb6u86R.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/7t0gURkbaHL7aF3mb6u86R.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9669e8ace0e47de2f01d96735cd7d4b6707d2691b4d38e0835ad8bed66faaf92. 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/0q5U0w9YA5H48GJ6wlDuf6.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/0q5U0w9YA5H48GJ6wlDuf6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b979ac8eb1078ab6c65877f461d2b58283aaf3a8681260f9350dba05839a375. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7bWJrmOwv1eGTe0WNS23BA.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/7bWJrmOwv1eGTe0WNS23BA.