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 0x97de563ae0e009d101a8c8137202103cc7ca78e2dd697470599eb21c6795a579. 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/4eff5fd2-349a-4dbe-be8e-84b0d6fd11a4.json and https://artists.proofprofile.net/proofs/artist/4eff5fd2-349a-4dbe-be8e-84b0d6fd11a4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x203ca9a82e6dd09a5ba8582d67fb0e0bacf5a20d68497ada709cddc9aaf4cf53","isrc":"UYA522300015","name":"Quema Quema","registered_at":"2026-06-10T17:21:53Z","spotify_id":"7KjxNLrmYSkevJCdr3FUN7","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 0x203ca9a82e6dd09a5ba8582d67fb0e0bacf5a20d68497ada709cddc9aaf4cf53. 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/7KjxNLrmYSkevJCdr3FUN7.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/7KjxNLrmYSkevJCdr3FUN7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2a5aaa743c775db5ad5f7bea5a1515acc7cfd0ff84d90a84059b865b59fd97. 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/5gCQobtazJL8JXJsq5AXKF.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/5gCQobtazJL8JXJsq5AXKF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a900b3edac7d2aefa28c100bbdc205a5c09171e776f9e6a1f2844bfe9a0a65. 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/1uMncO23PCHDwlWQupGt7J.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/1uMncO23PCHDwlWQupGt7J.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a900b3edac7d2aefa28c100bbdc205a5c09171e776f9e6a1f2844bfe9a0a65. 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/2eqXALhjcfbIQ1TZ7xvXWC.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/2eqXALhjcfbIQ1TZ7xvXWC.
{"copyright_id":"0xb7869f3f178db9de9adb0fe4a0fda3112e7f5cd4b651ec9d35bd30dafd4aaf03","isrc":"UYB282463161","name":"EN BUSCA DE LA GLORIA","registered_at":"2026-06-04T12:21:45Z","spotify_id":"610sC4En9n1hbAQBsjrjYo","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7869f3f178db9de9adb0fe4a0fda3112e7f5cd4b651ec9d35bd30dafd4aaf03. 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/610sC4En9n1hbAQBsjrjYo.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/610sC4En9n1hbAQBsjrjYo.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1278c39c1f21abf89fa2e5e8af74099d61956712a3c4c2fcba34d0a004fc4c4. 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/1zeGnR2ao10gPzDl3dqf9p.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/1zeGnR2ao10gPzDl3dqf9p.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a900b3edac7d2aefa28c100bbdc205a5c09171e776f9e6a1f2844bfe9a0a65. 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/3XB1ccS8WJXTG3QbDqiK8J.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/3XB1ccS8WJXTG3QbDqiK8J.