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 0x43a333931790b12120f56303b535e5d0070bd61fe2a45ca345d2ebbaa2f2423c. 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/abd3e1ed-19c2-4480-9dfc-010e1f6fe011.json and https://artists.proofprofile.net/proofs/artist/abd3e1ed-19c2-4480-9dfc-010e1f6fe011.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 0x5650e4e291f0e6c7e6a0dfdbfc1890f1ec909c87dc3ef1ed0dd42a651767db32. 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/7DoYvD1nsLBr6vIpa2AT07.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/7DoYvD1nsLBr6vIpa2AT07.
Wasting Time - Recorded At Spotify Studios NYC
{"copyright_id":"0xd4422e31c291b1a816607d2672fa7c7882a69bb0c3490087b8cea715eabf65b7","isrc":"CAUM81800209","name":"Wasting Time - Recorded At Spotify Studios NYC","registered_at":"2026-06-08T10:33:27Z","spotify_id":"5ff5WH1b1Te2PpVwLX9p96","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4422e31c291b1a816607d2672fa7c7882a69bb0c3490087b8cea715eabf65b7. 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/5ff5WH1b1Te2PpVwLX9p96.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/5ff5WH1b1Te2PpVwLX9p96.
Say It Ain't So - Recorded At Spotify Studios NYC
{"copyright_id":"0x02425d57605c2329dbd6aa5f5ec20049fc4606ff9534a04660b75334bea12f5d","isrc":"CAUM81800210","name":"Say It Ain't So - Recorded At Spotify Studios NYC","registered_at":"2026-06-04T07:36:57Z","spotify_id":"4NBSkqCopxDtoMNABwtsce","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02425d57605c2329dbd6aa5f5ec20049fc4606ff9534a04660b75334bea12f5d. 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/4NBSkqCopxDtoMNABwtsce.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/4NBSkqCopxDtoMNABwtsce.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6f9b4b5cb378eca31c4ab999bd0794a54ac225f5993ed94b6caa94da7f9bc1. 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/3pWx8xu9e1F0rW89hGq51i.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/3pWx8xu9e1F0rW89hGq51i.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fba760e18eba34e89736dcfcf3bd78a0303f2da411688d720d9a2af92446b2. 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/14PSNGPO5qD04OWgeKAy11.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/14PSNGPO5qD04OWgeKAy11.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7747a91e154a478979cdec861e785a2d64c0e22d63a005d2e0e346418ac08c74. 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/28FIqAkTgmOzPzBYq34YaL.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/28FIqAkTgmOzPzBYq34YaL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4226828384465dc1acf35cc340f66dce7cf0744b4f7f01db0be43de5c579d870. 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/3nJWtOHiTGDLVBYhbIjG7v.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/3nJWtOHiTGDLVBYhbIjG7v.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c6f2e840f92d23a0530edf9bb10f1a040b0a40da719bcba27d91a81d8201fb. 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/6d754cEpS3lAElWhmRqG0Z.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/6d754cEpS3lAElWhmRqG0Z.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccf74a6e04d9b9abf43da394dfce78d6d5a6d797dd5c0f335dbd95d11775f8d. 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/0uMMNfcxbevRIY1FB3UoZw.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/0uMMNfcxbevRIY1FB3UoZw.
{"copyright_id":"0x02425d57605c2329dbd6aa5f5ec20049fc4606ff9534a04660b75334bea12f5d","isrc":"CAUM81800210","name":"Say It Ain't So - Recorded At Spotify Studios NYC","registered_at":"2026-06-04T07:36:57Z","spotify_id":"0O4bb53tuSuMcI2jc6JppD","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02425d57605c2329dbd6aa5f5ec20049fc4606ff9534a04660b75334bea12f5d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0O4bb53tuSuMcI2jc6JppD.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/0O4bb53tuSuMcI2jc6JppD.