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 0xb3fa0a3bf2b344ae7d41d4210992e0587f2213c302618b2ae8d653b4408f8335. 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/51117001-efee-4a45-a869-1d2617900050.json and https://artists.proofprofile.net/proofs/artist/51117001-efee-4a45-a869-1d2617900050.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 0xd34cf911a65c49dc891d518e25d69e4c39e0b05d667036863b428fd610ef635d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5dnfZZasZ2zIG3PSgM4YNq.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/5dnfZZasZ2zIG3PSgM4YNq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9049128fc72e1376089f58db222b389da9c2463be62c828b0e11a38fec2ea4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5SNBwH40NIAapnXEjet6Rx.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/5SNBwH40NIAapnXEjet6Rx.
{"copyright_id":"0x02cdf4542803944031ed6031ef2cd052d473e80723ebef8bcdd9371dd31ab86b","isrc":"NLSU32400022","name":"Always Remember Us This Way","registered_at":"2026-06-08T03:58:20Z","spotify_id":"7FDwPGWke9WdgBsdEpzIQi","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cdf4542803944031ed6031ef2cd052d473e80723ebef8bcdd9371dd31ab86b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7FDwPGWke9WdgBsdEpzIQi.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/7FDwPGWke9WdgBsdEpzIQi.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488bd853c80f53edfb44afa4eb1f16e50c514e9d3880acc69e1e74d8987a9885. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6KB1GIbeAkTtDFcc9t0y0i.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/6KB1GIbeAkTtDFcc9t0y0i.
{"copyright_id":"0xd34cf911a65c49dc891d518e25d69e4c39e0b05d667036863b428fd610ef635d","isrc":"NLSU32400006","name":"Amsterdam Gaat Dood","registered_at":"2026-06-08T02:57:40Z","spotify_id":"1BzBS3vRNTInzXntTycZoD","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34cf911a65c49dc891d518e25d69e4c39e0b05d667036863b428fd610ef635d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1BzBS3vRNTInzXntTycZoD.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/1BzBS3vRNTInzXntTycZoD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9049128fc72e1376089f58db222b389da9c2463be62c828b0e11a38fec2ea4. 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/3yenKFlfEk703csDFDa4vT.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/3yenKFlfEk703csDFDa4vT.
{"copyright_id":"0x02cdf4542803944031ed6031ef2cd052d473e80723ebef8bcdd9371dd31ab86b","isrc":"NLSU32400022","name":"Always Remember Us This Way","registered_at":"2026-06-08T03:58:20Z","spotify_id":"00WIhld97zKRisjOVEPkaa","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cdf4542803944031ed6031ef2cd052d473e80723ebef8bcdd9371dd31ab86b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/00WIhld97zKRisjOVEPkaa.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/00WIhld97zKRisjOVEPkaa.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488bd853c80f53edfb44afa4eb1f16e50c514e9d3880acc69e1e74d8987a9885. 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/2rPS1OFBBb2eXpDpjAW40j.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/2rPS1OFBBb2eXpDpjAW40j.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7619d1ff82d082201a0b2ef87284b713c772141687562f3d4e1141202b6c0789. 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/1yjFUXq6S7x5RltsTLZSOz.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/1yjFUXq6S7x5RltsTLZSOz.
{"copyright_id":"0x5901cbe0ee26189c5227c502b3fcb3b34d4c9b26dd63fdd7d21eff43f3bacde6","isrc":"NLSU32400048","name":"Lose Control","registered_at":"2026-06-07T07:10:22Z","spotify_id":"1NN6MxPzCGQ0x9otC31Hqm","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5901cbe0ee26189c5227c502b3fcb3b34d4c9b26dd63fdd7d21eff43f3bacde6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1NN6MxPzCGQ0x9otC31Hqm.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/1NN6MxPzCGQ0x9otC31Hqm.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175a04f3aa6333f1cd056746bc41d44e81c33edf89182abe714464902d873c77. 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/4jmkZkhP1HGbnMuUEBYI5e.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/4jmkZkhP1HGbnMuUEBYI5e.
Beste Zangers 2024 (Aflevering 7- Tangerine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7619d1ff82d082201a0b2ef87284b713c772141687562f3d4e1141202b6c0789. 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/5LKWc4ezs3r4wjd2lwZXjB.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/5LKWc4ezs3r4wjd2lwZXjB.
{"copyright_id":"0x02cdf4542803944031ed6031ef2cd052d473e80723ebef8bcdd9371dd31ab86b","isrc":"NLSU32400022","name":"Always Remember Us This Way","registered_at":"2026-06-08T03:58:20Z","spotify_id":"3SRI8tWmN2xGgo65hHalHv","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cdf4542803944031ed6031ef2cd052d473e80723ebef8bcdd9371dd31ab86b. 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/3SRI8tWmN2xGgo65hHalHv.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/3SRI8tWmN2xGgo65hHalHv.
Beste Zangers 2024 (Aflevering 8- Duetten)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6208488f774ffd573917d039d0acccca69122756235fb8d25e7a6036e62252a. 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/5nBxBMznxs6477ToF4BBxf.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/5nBxBMznxs6477ToF4BBxf.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175a04f3aa6333f1cd056746bc41d44e81c33edf89182abe714464902d873c77. 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/6KP0IGaTSKK7HHSbaTZd4a.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/6KP0IGaTSKK7HHSbaTZd4a.
{"copyright_id":"0x5901cbe0ee26189c5227c502b3fcb3b34d4c9b26dd63fdd7d21eff43f3bacde6","isrc":"NLSU32400048","name":"Lose Control","registered_at":"2026-06-07T07:10:22Z","spotify_id":"7MKtzHoZgBaZ34grH7Vh4d","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5901cbe0ee26189c5227c502b3fcb3b34d4c9b26dd63fdd7d21eff43f3bacde6. 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/7MKtzHoZgBaZ34grH7Vh4d.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/7MKtzHoZgBaZ34grH7Vh4d.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34cf911a65c49dc891d518e25d69e4c39e0b05d667036863b428fd610ef635d. 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/4pzbtf4XN3S3kyTVGPYSpW.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/4pzbtf4XN3S3kyTVGPYSpW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6208488f774ffd573917d039d0acccca69122756235fb8d25e7a6036e62252a. 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/02gBOedGls5uvAneQzvDbm.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/02gBOedGls5uvAneQzvDbm.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175a04f3aa6333f1cd056746bc41d44e81c33edf89182abe714464902d873c77. 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/1ZHNkoJkyIIko1KdPA1auC.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/1ZHNkoJkyIIko1KdPA1auC.
{"copyright_id":"0x5901cbe0ee26189c5227c502b3fcb3b34d4c9b26dd63fdd7d21eff43f3bacde6","isrc":"NLSU32400048","name":"Lose Control","registered_at":"2026-06-07T07:10:22Z","spotify_id":"69kLxm7mtlTzwNMhAvhQSd","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5901cbe0ee26189c5227c502b3fcb3b34d4c9b26dd63fdd7d21eff43f3bacde6. 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/69kLxm7mtlTzwNMhAvhQSd.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/69kLxm7mtlTzwNMhAvhQSd.
Beste Zangers 2024 (Aflevering 3- Matthijn Buwalda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a69b1fb48833eefe06ff2515349054f009241f19d7b23294c5f1f2a04279f2. 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/1DR8ErDynTkpb7MwW5NKv9.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/1DR8ErDynTkpb7MwW5NKv9.
Beste Zangers 2024 (Aflevering 6- Hannah Mae)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488bd853c80f53edfb44afa4eb1f16e50c514e9d3880acc69e1e74d8987a9885. 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/7opN8plWMJC7GKj1pT7h2R.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/7opN8plWMJC7GKj1pT7h2R.
Beste Zangers 2024 (Aflevering 1- Karin Bloemen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34cf911a65c49dc891d518e25d69e4c39e0b05d667036863b428fd610ef635d. 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/50g0bxoo4Hr7jqtKawuqK0.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/50g0bxoo4Hr7jqtKawuqK0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6208488f774ffd573917d039d0acccca69122756235fb8d25e7a6036e62252a. 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/753LmumSZ7eOkXjzBahZti.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/753LmumSZ7eOkXjzBahZti.
Beste Zangers 2024 (Aflevering 2- Claude)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9049128fc72e1376089f58db222b389da9c2463be62c828b0e11a38fec2ea4. 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/1rNYQMpXqAvtER619489VR.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/1rNYQMpXqAvtER619489VR.