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 0x77c587989ee45ddc46d068793cf84b18aeb3d18c700c3a0af2dbf8a505e10fa3. 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/afae4440-c44e-4bc2-be7d-00353f018d17.json and https://artists.proofprofile.net/proofs/artist/afae4440-c44e-4bc2-be7d-00353f018d17.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x1f912f5fa38a37f70503eef53ae3eb5625b0c86e65acd44b758617d6ffcc77e4","isrc":"ZZOPM2223793","name":"En Realidad","registered_at":"2026-06-10T05:47:18Z","spotify_id":"3AkyYehTyzYcRZoneu6c0r","type":"track"}
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 0x1f912f5fa38a37f70503eef53ae3eb5625b0c86e65acd44b758617d6ffcc77e4. 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/3AkyYehTyzYcRZoneu6c0r.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/3AkyYehTyzYcRZoneu6c0r.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83b1066557b896e615237b14eef70b65bf6188c99c706cc64e9ae0a3746b4e1. 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/2AiljZjAjdT2YXY8MLHxvC.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/2AiljZjAjdT2YXY8MLHxvC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28ecd4599fc2d0b6782ca820e3d51dc1e45ad8b042890a59acd16c39e8617e. 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/4FGilCQ82RQkus5jy6Gf6X.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/4FGilCQ82RQkus5jy6Gf6X.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe636a0bf9293821cc5ca8cc3cb6f653052a31698842e67169dae12e5b4d09654. 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/6CMD9ku1ceyZblaoSMSzSj.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/6CMD9ku1ceyZblaoSMSzSj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499c4d2771109e642debd086209f6f42179ee0152e3e75af806ca6ffe2b932a6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6P3HIpvh07OIAfkUIyqGPE.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/6P3HIpvh07OIAfkUIyqGPE.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f996361b99af371a4d2213ee8a88913627d4ce4149836665bd84cca5b83a491. 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/6Ji0NBRwu59emt2VKgx9Fa.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/6Ji0NBRwu59emt2VKgx9Fa.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7b840a140d86e8aff757acb43e0a91327070dda9c8c201f23c0dcdcdf170f. 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/5IMphuTpS9bBryysRjWoXn.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/5IMphuTpS9bBryysRjWoXn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46615de1628e2eec34b35eab8635392e69872f04b8d8b338ec87667e37e00ea. 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/43VknqJ64jSP6fRP9dThal.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/43VknqJ64jSP6fRP9dThal.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023ff9a39b486dbeaa27c157114d90bfb1c8c15a3d43b7c2c2f85d84a833facf. 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/0nyINNmEBsWaZ2rTRTB2K8.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/0nyINNmEBsWaZ2rTRTB2K8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d7f543ba9a7062e9aff541b56c6b0c5b15018c1ce02ab73c9d41732c3c2ff6. 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/5iOUr4051epqhkZWnSED3K.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/5iOUr4051epqhkZWnSED3K.
{"copyright_id":"0x75e993aefc8e69acd4a1bafdd3055c6fe155ee4351b52d61dfd5d94d1dba65a4","isrc":"ESA011711084","name":"El Solitario","registered_at":"2026-06-08T04:56:23Z","spotify_id":"7raKmwWDccwAS0vFPnLIBx","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e993aefc8e69acd4a1bafdd3055c6fe155ee4351b52d61dfd5d94d1dba65a4. 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/7raKmwWDccwAS0vFPnLIBx.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/7raKmwWDccwAS0vFPnLIBx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b82da9f7dc3e7654c46744e824186083d93da021615bc0cb5ca854e71092a42. 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/6xLOA70peh9ntE9IuDTsXf.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/6xLOA70peh9ntE9IuDTsXf.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c2b9509e2c51689718e5b6fb7ef92230a050443648633c968815574de0bc4e. 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/5WlaYA0CIVtQ6Amh2CtG7T.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/5WlaYA0CIVtQ6Amh2CtG7T.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee475d932fe63780881af1c1a24847e2be8f029e16b3434b6f96288ad2f86273. 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/22LC0oNlvNQdfcIaRXfb75.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/22LC0oNlvNQdfcIaRXfb75.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e11b004abcecab6e468e043d1a99536d8109e24ed0217fd454452a12611307. 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/3HNQhnQjtlWvGMznldztFO.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/3HNQhnQjtlWvGMznldztFO.
{"copyright_id":"0x6fff4a5e088464bea9e6711c51fa8fd3b89abe78b5202eb22c4775e14d19f4b0","isrc":"ES71G2041730","name":"Eco Friendly","registered_at":"2026-06-17T23:44:12Z","spotify_id":"47JmxoTF5wJXDUsmhUXh9g","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fff4a5e088464bea9e6711c51fa8fd3b89abe78b5202eb22c4775e14d19f4b0. 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/47JmxoTF5wJXDUsmhUXh9g.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/47JmxoTF5wJXDUsmhUXh9g.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83ea0df51eba6a15d1dde532e784c0dc1beef2f3662c32aa23e27282b0dbc20. 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/3FEYQ61nd5IHsfgG5gDoUS.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/3FEYQ61nd5IHsfgG5gDoUS.