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 0xa8d0f02101cdc9add730579789a70b2f8d0ff9b7f16bbc813fe4aa620561cfea. 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/3e733cd9-c015-436b-938e-0660e6fdba98.json and https://artists.proofprofile.net/proofs/artist/3e733cd9-c015-436b-938e-0660e6fdba98.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 0x948ccb56f96abec983a3d8c153dc1cc7c40e733d7b407e414de39dcb8c51dfab. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/39hPPxStC4iQEwPH0rOFi4.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/39hPPxStC4iQEwPH0rOFi4.
Between the Two of Us (feat. Ruben Hein)
Nashville Boogie (feat. The Ragtime Wranglers)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47d9ddce26a7dce37b057ff992762daffa680ed9a4a63a42a4803efb5272b05. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4cv3VOL8g19Nr5P3xCYBFN.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/4cv3VOL8g19Nr5P3xCYBFN.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a36f4db010a0915fd2c51c6e2b3ce5c9fe06c86856ec4473c61038018a8e2bf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3sxUnMWSNgkex9xOPniyOn.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/3sxUnMWSNgkex9xOPniyOn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995cea307df48af8a127183de8a8bc64cf2e14aed22f1a048043f09c4d50d792. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/420F7Oq1f61fdv1Gme0dcK.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/420F7Oq1f61fdv1Gme0dcK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f2b5b3abac8ce8781960845fa2051f0939ab60d89d7ee5b5c4c926248a5d56. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/61XwydkxbfvuV1CsIflKM1.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/61XwydkxbfvuV1CsIflKM1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5d800fdc95bd584a4a78dcecf38568119215712a995e7f2075e173ad6b15d2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/20KyR96w3wmJLGMaNc11rW.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/20KyR96w3wmJLGMaNc11rW.
{"copyright_id":"0x987c37438e70ac6262dc7370c43ef4464e17aa5817cb5beee2ce8feba192e565","isrc":"NLH271600002","name":"Mis je zo graag","registered_at":"2026-06-04T11:23:09Z","spotify_id":"4TFVnMJSV3hSKronoDLPdu","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987c37438e70ac6262dc7370c43ef4464e17aa5817cb5beee2ce8feba192e565. 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/4TFVnMJSV3hSKronoDLPdu.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/4TFVnMJSV3hSKronoDLPdu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987c37438e70ac6262dc7370c43ef4464e17aa5817cb5beee2ce8feba192e565. 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/0G4IYryl6MtBewsGsfbRo2.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/0G4IYryl6MtBewsGsfbRo2.
Een Dag Om Nooit Te Vergeten (Originele Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9673f8548dd15502f944298f8bec6fa24a2425bdbc24f5d31dc09f3130f58fd9. 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/06Uyfzq4Nh2HrAY6XJVXdd.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/06Uyfzq4Nh2HrAY6XJVXdd.
{"copyright_id":"0x9f2f3a0f2ce971e5d16d9c27bfbf9f982fe26d7eaa9c44737d7097d50bda0753","isrc":"NLK072100016","name":"Welkom Zusje/Broertje","registered_at":"2026-06-21T08:17:01Z","spotify_id":"0aaS56W71uVTWMocGMZiPH","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2f3a0f2ce971e5d16d9c27bfbf9f982fe26d7eaa9c44737d7097d50bda0753. 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/0aaS56W71uVTWMocGMZiPH.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/0aaS56W71uVTWMocGMZiPH.
{"copyright_id":"0xc84f6e605edd59aab4c8af85a6b32d84cbb9a7045a18e6a1daa40029c4bffacc","isrc":"NLQ272200057","name":"Tussen Jou En Mij","registered_at":"2026-06-04T08:54:35Z","spotify_id":"0GbBLC50dJxjPiTglbxcy6","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84f6e605edd59aab4c8af85a6b32d84cbb9a7045a18e6a1daa40029c4bffacc. 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/0GbBLC50dJxjPiTglbxcy6.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/0GbBLC50dJxjPiTglbxcy6.