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 0x9db45837c32ec6a830262c3d44b132b34ce9304f0779859da01378c6ed12122d. 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/5d7510a1-9c2c-42ac-b710-6e0802f70434.json and https://artists.proofprofile.net/proofs/artist/5d7510a1-9c2c-42ac-b710-6e0802f70434.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 0xb61a2ccafb8b83fb338ff06626fb6879f445601bd9c834c2ad77180a0847edd1. 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/4DzxY2UU2gfHGJIzlR7SoA.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/4DzxY2UU2gfHGJIzlR7SoA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5b585cab6a2de8f7a656e6fe3efab357bc016057b44e63e2fb6991c7bf6014. 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/66lr1msBMBgaU14WMqcM9f.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/66lr1msBMBgaU14WMqcM9f.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c4fb682e0dbd1ce40fa6dd182048ad29df72cd279135e20ef70763894cf3a0. 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/2pO441R3SvR2O1G1Q4pGe0.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/2pO441R3SvR2O1G1Q4pGe0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0034697cd59916571b49dd15edc061e29932adb419e2b062069ccaff7be22066. 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/0YRWFGr8QkH3GhmcLYOUTv.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/0YRWFGr8QkH3GhmcLYOUTv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143d330f5356e5d40ce4b96963380c3907f8f4da342be85440998bf32622fda3. 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/5FfNxZt0A7HWHkyra0QiGU.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/5FfNxZt0A7HWHkyra0QiGU.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d7b3f147da952a42535bf07c6c44b272790fdc0ba4fa03b8cf42e89ffd2fd8. 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/2FIUo2N9jdFLjc8ICfl6if.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/2FIUo2N9jdFLjc8ICfl6if.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7e9aeda812dd3a74d2a295b37017257c4c6acd0015888b3e97fc67275f4bf9. 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/1KWQNyfQxqB9oNjz8qLVyd.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/1KWQNyfQxqB9oNjz8qLVyd.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb224754cff5046debf7e81dd84e014ece0e77f53425de6364f158959e1ea90d2. 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/4L6KI2P3DKrJU69ff6C1QZ.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/4L6KI2P3DKrJU69ff6C1QZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c583ca460265d3da513cfd3e6bccee4962b5c76292f87c5ea66ec8d18772843. 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/5qLlEaKLP4FI09QqDYVFCL.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/5qLlEaKLP4FI09QqDYVFCL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c97295c8df3e9e5f52b45f665f052fa667c239dd689a35723baeee0bb3a596. 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/0Mllvrh9hG4xmdKkr1MlYZ.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/0Mllvrh9hG4xmdKkr1MlYZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecc493136db58584d7246c8c533815a066ef995ad06617544f1755268f7a4cf. 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/0T7gCTRVrjm7fKJcIciXm7.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/0T7gCTRVrjm7fKJcIciXm7.
{"copyright_id":"0xea3b5fa2bca290d02e67cfa59c69ca8dbcb56d019f90a75874e88c050c9e63d9","isrc":"SE5W32103306","name":"Sauna Friends","registered_at":"2026-06-04T11:36:32Z","spotify_id":"6wzbTAUcIuTU8ioK3ySpSg","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3b5fa2bca290d02e67cfa59c69ca8dbcb56d019f90a75874e88c050c9e63d9. 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/6wzbTAUcIuTU8ioK3ySpSg.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/6wzbTAUcIuTU8ioK3ySpSg.
{"copyright_id":"0xa4fd92e19b157cdccb7afb3608e458bd06db026ba41d053b321f5de4e3593a02","isrc":"SE5W32102029","name":"Through The Grains","registered_at":"2026-06-27T06:46:43Z","spotify_id":"33wjqtVpWOcvX8uUrOzzyJ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fd92e19b157cdccb7afb3608e458bd06db026ba41d053b321f5de4e3593a02. 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/33wjqtVpWOcvX8uUrOzzyJ.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/33wjqtVpWOcvX8uUrOzzyJ.