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 0xde4a8025c6a099a5f104a7ea853f067d1fbe46272a1bbd0a8df36951d3a1c468. 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/10dd3993-259f-4682-9806-00e5cca418af.json and https://artists.proofprofile.net/proofs/artist/10dd3993-259f-4682-9806-00e5cca418af.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 0x426c5317ebfd4eb545dc85d0e17875a9d5674e3988e42912abb592e403dc1c36. 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/0FElHU73Oq9TU32BhWSie6.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/0FElHU73Oq9TU32BhWSie6.
{"copyright_id":"0xacce04cccae285e6573d473ef3c6741a7fbef90795a05bd992cb8fba7df03ef7","isrc":"SE5Q51700922","name":"Begin Here","registered_at":"2026-06-07T09:31:07Z","spotify_id":"3GJazM11xB5RoDySgEA9qs","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacce04cccae285e6573d473ef3c6741a7fbef90795a05bd992cb8fba7df03ef7. 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/3GJazM11xB5RoDySgEA9qs.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/3GJazM11xB5RoDySgEA9qs.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e9076b2dd6155d30ea98fdb3e7296c93c689141cdde5105cf99bab5cf9369f. 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/1vAsoYKo0nfLjOAtuYX3WQ.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/1vAsoYKo0nfLjOAtuYX3WQ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573107f4a8bdc11051e7b4dbac663db1c47333bd6190cfcff3be5c38c8438773. 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/2236Rw4h6OBwtNTtAUiyJ5.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/2236Rw4h6OBwtNTtAUiyJ5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f008724679937bf8a50165b0d7b9e41d5c0c5e7b0dba081274adc9e6f4674be. 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/67BWHAihdRreVG3eUmpfdU.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/67BWHAihdRreVG3eUmpfdU.
{"copyright_id":"0x83221b776c0ca1acd8fed2307ea5b14a28e57263900dd5193c1a554bf5c63d5a","isrc":"SE5Q51700926","name":"The Slow Calm","registered_at":"2026-06-07T22:53:37Z","spotify_id":"7jaEKEhbhLpEIBJ6FvmNTZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83221b776c0ca1acd8fed2307ea5b14a28e57263900dd5193c1a554bf5c63d5a. 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/7jaEKEhbhLpEIBJ6FvmNTZ.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/7jaEKEhbhLpEIBJ6FvmNTZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cde69092bfc9bc616c3c0a0b608fdf9acfd49b93c33d7d1953d09965f223a9. 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/4eo8O8yJYzLp1fkg6nTpSI.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/4eo8O8yJYzLp1fkg6nTpSI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8434fd50d930e0d4090923a278678900bdef3146c11868d650e1c4379147179. 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/0wmmFkwOtzaanH4T5vMMLz.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/0wmmFkwOtzaanH4T5vMMLz.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c583de7cb622efd062e434fc5128978dca37fb285536038c2d87ee236e7919e. 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/4zXAaSmvFO2XrdlHFdnBB6.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/4zXAaSmvFO2XrdlHFdnBB6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f2a086f75df81d77ced8b9fcfb115231940a75cd0f7472dbb2ce2e6ec847cc. 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/7CMVbehd7SYfX1iWFMJh9w.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/7CMVbehd7SYfX1iWFMJh9w.
The Longest Way Back (Scaled Down Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81476d8f2384759831a123ce66450409896bd7116054f369d6d336c960cf2bba. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3AuqvcJSc1vGE1BPvwJZc8.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/3AuqvcJSc1vGE1BPvwJZc8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62278ae9237f67435fae9c4f1056fe7c25b6635755e2e4977f216cd784960ae0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3OXQUrlCvlsz9F0Maekgyl.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/3OXQUrlCvlsz9F0Maekgyl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573107f4a8bdc11051e7b4dbac663db1c47333bd6190cfcff3be5c38c8438773. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3lAKGsZ0SCX3vhepLJUubi.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/3lAKGsZ0SCX3vhepLJUubi.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c1f311880c9b9a72595c5b904d5d2c5cb9cf249320a8d178a029a819eaa07e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4CiGoW5ISgb6qawLQu01xR.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/4CiGoW5ISgb6qawLQu01xR.