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 0x5e40cc60c23331dcb53569fc27a51e019141f496ec5866cdd132054a606a8968. 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/1ba35ba8-ea69-4b3e-a293-f492b4a9d901.json and https://artists.proofprofile.net/proofs/artist/1ba35ba8-ea69-4b3e-a293-f492b4a9d901.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De streken van Tante Toets - Radio versie
De streken van Tante Toets - Karaoke versie
Een Echte Piet (De Club Van Sinterklaas)
{"copyright_id":"0x03c0ff0f28ff90f7cfb60c6a1dddcc8f7d29c604ae60d5af018526628b88102e","isrc":"NL2QQ2100095","name":"Zoeken, Zoeken, Zoeken","registered_at":"2026-06-11T03:27:24Z","spotify_id":"5Q9PwcMBX4lPghd1Xwphfz","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 0x03c0ff0f28ff90f7cfb60c6a1dddcc8f7d29c604ae60d5af018526628b88102e. 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/5Q9PwcMBX4lPghd1Xwphfz.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/5Q9PwcMBX4lPghd1Xwphfz.
{"copyright_id":"0x0a86565fc9c04dde7e2eb502bbb24d826a9b24845c102daeeef0743a8e19aff9","isrc":"NL2QQ2100094","name":"Alle Brieven","registered_at":"2026-06-23T06:39:37Z","spotify_id":"3bPChGjw0bR8qWuaiDxswj","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a86565fc9c04dde7e2eb502bbb24d826a9b24845c102daeeef0743a8e19aff9. 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/3bPChGjw0bR8qWuaiDxswj.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/3bPChGjw0bR8qWuaiDxswj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388ce623388ebc37530cb6ae385878f8fd4c5dbc3980da96e23a883466f74a17. 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/2D24FYmRmwDUfhB7SNE7mm.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/2D24FYmRmwDUfhB7SNE7mm.
{"copyright_id":"0x73568c886dedcdfee5455b643af080f3c216e9c43028296a860d270b645c6a9b","isrc":"NL2QQ2100104","name":"Het Paard Van Sinterklaas","registered_at":"2026-06-22T09:06:47Z","spotify_id":"2xDEm7Ua0vqUJgHa6udKMV","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73568c886dedcdfee5455b643af080f3c216e9c43028296a860d270b645c6a9b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2xDEm7Ua0vqUJgHa6udKMV.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/2xDEm7Ua0vqUJgHa6udKMV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a3a09219524a65870fa7519310695e4c54b81395dc62f7e0b18131f9ffa1f0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0LajHOJjyQnPi7kRHvXo3G.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/0LajHOJjyQnPi7kRHvXo3G.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94027969076f8f9ba51c060af88fe11c412bb7c66e206a182547c4b81e0f98. 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/709JUQHRYd2oIaImWqjOSA.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/709JUQHRYd2oIaImWqjOSA.
{"copyright_id":"0xeea5cb0ae6c11f44bb0cbd38bcd12ef54e1f61501a6192c3cc4ab4b53f0331b9","isrc":"NLU7E2300065","name":"Ben Je Boos Op Mij","registered_at":"2026-06-10T22:36:18Z","spotify_id":"7M7z1mjGdrEHiqCfr80XuI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea5cb0ae6c11f44bb0cbd38bcd12ef54e1f61501a6192c3cc4ab4b53f0331b9. 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/7M7z1mjGdrEHiqCfr80XuI.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/7M7z1mjGdrEHiqCfr80XuI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd527bff46d3305ace1841a32e948dec0ac85a81095b1dd26a8b57127833585c9. 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/2r9Iz7BXY64ZHmEdlWWHOx.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/2r9Iz7BXY64ZHmEdlWWHOx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f6f19d6a3f5e220da59c9aef926b2b54733c26344af61c91903534501a5d59. 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/3h4vzpeiwvfUhYaSlMDDVT.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/3h4vzpeiwvfUhYaSlMDDVT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74787c2b71c418f531ca78449f73af57673d1ad305a6945a62da26e58687d33d. 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/1pWzhKZSqmCNHb7yGuEqWj.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/1pWzhKZSqmCNHb7yGuEqWj.
{"copyright_id":"0x50d8ee11c434ef4d8442d3c053366a315bb75ecf2e021b5815f4b4aef7d87193","isrc":"NL2QQ2000073","name":"Paniek Op Het Kasteel","registered_at":"2026-06-27T19:03:03Z","spotify_id":"7zC0sFeK5CkP9AMa0MqfFR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d8ee11c434ef4d8442d3c053366a315bb75ecf2e021b5815f4b4aef7d87193. 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/7zC0sFeK5CkP9AMa0MqfFR.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/7zC0sFeK5CkP9AMa0MqfFR.
{"copyright_id":"0x6e7033736b161eb7dd09dac6ec78f5d23b9155bff6b7255d6c617f4aeb7609d2","isrc":"NL2QQ2000081","name":"Feesten Op De Daken","registered_at":"2026-06-08T23:53:05Z","spotify_id":"2Fl63YqvOuACBAapEH2QSL","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7033736b161eb7dd09dac6ec78f5d23b9155bff6b7255d6c617f4aeb7609d2. 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/2Fl63YqvOuACBAapEH2QSL.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/2Fl63YqvOuACBAapEH2QSL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275613c8ed2cf28c3cb0796b9a6002574ac4be3a236b0e2cb98ca6d9f4c22d19. 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/2f4ON8A5P34UNQVoT64Lk5.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/2f4ON8A5P34UNQVoT64Lk5.
{"copyright_id":"0x2d909e5d549e7586623402c065bd60c5bf16ddc6f2071a968a1de6f1974a0cb5","isrc":"NL2QQ2000086","name":"Pakjesavond op 5 december","registered_at":"2026-06-11T19:19:46Z","spotify_id":"6EyadrHNIN42njzCBTuehY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d909e5d549e7586623402c065bd60c5bf16ddc6f2071a968a1de6f1974a0cb5. 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/6EyadrHNIN42njzCBTuehY.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/6EyadrHNIN42njzCBTuehY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3286529db49e2795e6840bd3cdbaa6b0582fc4d3942b946994e30e1d095b2f0b. 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/46J06lZ7QKZYeNvVDDMXdx.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/46J06lZ7QKZYeNvVDDMXdx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d06415b6b5f688e5ae5885c13cf3cdf8a4113ef79e5226606b29ac1e53f9b9. 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/1tFUjHf8Zi3kOL7tywoTSA.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/1tFUjHf8Zi3kOL7tywoTSA.
{"copyright_id":"0x58a9edab1cb9493f127a4ff64832d520ec02e659df7ae59929f2401d046734d0","isrc":"NLU7E2200018","name":"Allermooiste Schoentje","registered_at":"2026-06-09T21:57:52Z","spotify_id":"4uwTUKXDuwuDLXGYUtOAlC","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a9edab1cb9493f127a4ff64832d520ec02e659df7ae59929f2401d046734d0. 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/4uwTUKXDuwuDLXGYUtOAlC.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/4uwTUKXDuwuDLXGYUtOAlC.