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 0x2309c6a83785e108b2e4073ec97fdb3790497f83265b005d964b14fb6177413b. 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/cbf3ac94-8ded-4a6a-8c70-645e61d7c31a.json and https://artists.proofprofile.net/proofs/artist/cbf3ac94-8ded-4a6a-8c70-645e61d7c31a.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 0xca4b02b58d8261743b5efc36068be51a71246abb52885e594dd050c14b029f27. 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/2ZO0TdXHD2zG0DXK7Oy4aG.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/2ZO0TdXHD2zG0DXK7Oy4aG.
{"copyright_id":"0x29dee929a5756bcb71123a28a4069177653dbb4df2b80e40263acdb08656a047","isrc":"FR2X42486104","name":"only when i was with you","registered_at":"2026-06-06T20:12:19Z","spotify_id":"5GrGDLcNCM2GppSiLKteL7","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dee929a5756bcb71123a28a4069177653dbb4df2b80e40263acdb08656a047. 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/5GrGDLcNCM2GppSiLKteL7.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/5GrGDLcNCM2GppSiLKteL7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458c78fbee734abc6647448ab7cf3ad59d7f21188adf985a20675a46cfa16424. 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/0xBUFwwq5zFFr5iZMAG5NP.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/0xBUFwwq5zFFr5iZMAG5NP.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7554f9b21a5229526e240b041175d20e7cf6466f5ae968522c83938a45c573. 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/6GKizdqvN1rKP8TxhuBILg.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/6GKizdqvN1rKP8TxhuBILg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184bb2ba2e3a15594e0a321526db2721019f5bce22552118d5844a0d44117531. 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/7iDZ2DyOXyl4YIRzw35kfi.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/7iDZ2DyOXyl4YIRzw35kfi.
{"copyright_id":"0xeee1df0f5a5df030f496f7bab1b44fd6ff521ae0a10fdee77b8f6bb26a40b3b0","isrc":"QZHN52066811","name":"my rose","registered_at":"2026-06-25T02:42:32Z","spotify_id":"4BHWrFyzAVjuE5h5LAH5uP","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee1df0f5a5df030f496f7bab1b44fd6ff521ae0a10fdee77b8f6bb26a40b3b0. 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/4BHWrFyzAVjuE5h5LAH5uP.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/4BHWrFyzAVjuE5h5LAH5uP.
{"copyright_id":"0x9e5d3ffd552fbd6ca8e9ad2d9a823b25971c2ed26c6211883438ee7cf45ad55b","isrc":"NLT2H2200209","name":"meet again","registered_at":"2026-06-06T18:53:00Z","spotify_id":"7pTHDsuijpklYBKDDiCh8f","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5d3ffd552fbd6ca8e9ad2d9a823b25971c2ed26c6211883438ee7cf45ad55b. 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/7pTHDsuijpklYBKDDiCh8f.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/7pTHDsuijpklYBKDDiCh8f.