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 0x0d273b3347cae234aabc5152eee7a1a2ec6e6474000eb3b44ba7520976ac986f. 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/897f80d6-c6dd-47ef-adbc-1803f8456068.json and https://artists.proofprofile.net/proofs/artist/897f80d6-c6dd-47ef-adbc-1803f8456068.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x127510e838bfee9bcb50ede74c0ff821ce7303463eff29f9a87617b6d5928f8c","isrc":"NLK072200010","name":"Het Eerste Rondje","registered_at":"2026-06-09T19:57:22Z","spotify_id":"4IFrB9LbWGZUI5l3WFI4gq","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 0x127510e838bfee9bcb50ede74c0ff821ce7303463eff29f9a87617b6d5928f8c. 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/4IFrB9LbWGZUI5l3WFI4gq.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/4IFrB9LbWGZUI5l3WFI4gq.
Shatterproof - Sebastian Davidson Extended Remix
Shatterproof - Infinity Ink Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccefc8d4bf9ae352635d3ac8aa1797c852bac12a492c68cea0587368823c6dd. 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/6uqpNQYnxhPEjiCxDGJPPi.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/6uqpNQYnxhPEjiCxDGJPPi.
Up All Night - Harold van Lennep Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacbfe11b006c44a12822d077fbe3d7130be6643b65235ac9214f689a3ac169c. 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/6ZS7KBAGCT5kg3HyQ4qMOM.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/6ZS7KBAGCT5kg3HyQ4qMOM.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d39c2a544d172a78b5b75f32388c57572309dce4f33404d6aca329809f91d7e. 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/32X1eJMcY9lpPz1Wxt4eMB.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/32X1eJMcY9lpPz1Wxt4eMB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccefc8d4bf9ae352635d3ac8aa1797c852bac12a492c68cea0587368823c6dd. 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/7GvUIZ9SBNwU81VMcu9a7u.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/7GvUIZ9SBNwU81VMcu9a7u.
{"copyright_id":"0x73a25bfec0ee4ac4db3f7e509afa086dd1910512ed661ec001018bdb2bcc1d02","isrc":"NLF712409957","name":"Run - Christmas On The Way","registered_at":"2026-06-29T16:07:03Z","spotify_id":"4lTXuRTslzibRMoP0t7tqv","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a25bfec0ee4ac4db3f7e509afa086dd1910512ed661ec001018bdb2bcc1d02. 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/4lTXuRTslzibRMoP0t7tqv.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/4lTXuRTslzibRMoP0t7tqv.
Something Like Magic - Extended Club Mix
Beste Zangers 2023 (Aflevering 8- Duetten)
{"copyright_id":"0xa4f7cce6f07a029126f5bdf2c08eeaa04ba549b5da4906a101961923eff5bea0","isrc":"NLSU32300049","name":"You Raise Me Up","registered_at":"2026-06-09T08:17:12Z","spotify_id":"1E4WVP7HxB5kyIYso4lc87","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f7cce6f07a029126f5bdf2c08eeaa04ba549b5da4906a101961923eff5bea0. 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/1E4WVP7HxB5kyIYso4lc87.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/1E4WVP7HxB5kyIYso4lc87.
{"copyright_id":"0xee822cc6982401a735df98d58821788d391da62a45332eafa0907c2c8a2a7193","isrc":"NLSU32300048","name":"De Dwaasheid Van M'n Jeugd","registered_at":"2026-06-10T18:23:06Z","spotify_id":"6GRhLEWQJSm9zjy0hjaqne","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee822cc6982401a735df98d58821788d391da62a45332eafa0907c2c8a2a7193. 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/6GRhLEWQJSm9zjy0hjaqne.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/6GRhLEWQJSm9zjy0hjaqne.
Hollandse Hits - Top 100 (Beste Aller Tijden)
{"copyright_id":"0x16a388cf05aaad45af96655acb4ae9c4794cd2be7270cea6f0921b8a46eeb439","isrc":"NLH591100122","name":"Sterker Nu Dan Ooit","registered_at":"2026-06-23T07:23:39Z","spotify_id":"23jmFTu2W1eADowm43OHY3","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a388cf05aaad45af96655acb4ae9c4794cd2be7270cea6f0921b8a46eeb439. 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/23jmFTu2W1eADowm43OHY3.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/23jmFTu2W1eADowm43OHY3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0be8454f721df9e38adb7dc518b9e81e37545bea93ed5c05c0702d3a874d8a. 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/78TN1zfxkmNQ9EO3dGh5SQ.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/78TN1zfxkmNQ9EO3dGh5SQ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e7641ea4685312700640fc42b9a138bf02860914b857e1ba7e4d052744fb95. 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/58KDh4Y7oR2aH8TYBEPKgf.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/58KDh4Y7oR2aH8TYBEPKgf.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f365bc742d73b0fece08428b29fa350901117e90fe3df60da84b27114522775. 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/6W1Zdm3e7Bd0MaP6MHdYFS.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/6W1Zdm3e7Bd0MaP6MHdYFS.
{"copyright_id":"0x5e6cbc679add50823fef117a9a68b943b0071bb3d8deff9007e74ff3b430f687","isrc":"NLSU32300022","name":"Always On My Mind","registered_at":"2026-06-08T03:53:51Z","spotify_id":"4S9AOTfkopaXuky0WmUoQL","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6cbc679add50823fef117a9a68b943b0071bb3d8deff9007e74ff3b430f687. 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/4S9AOTfkopaXuky0WmUoQL.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/4S9AOTfkopaXuky0WmUoQL.
{"copyright_id":"0xeb12489b3774bdb4cfed47bf187457b6b0ea73944245934f0a4aa11df7c11391","isrc":"NLSU32300014","name":"The Great Pretender","registered_at":"2026-06-10T18:31:12Z","spotify_id":"47qYvnpGObt3eWuqgNPLG4","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb12489b3774bdb4cfed47bf187457b6b0ea73944245934f0a4aa11df7c11391. 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/47qYvnpGObt3eWuqgNPLG4.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/47qYvnpGObt3eWuqgNPLG4.
Beste Zangers 2023 (Aflevering 3 - Marco Bakker)
{"copyright_id":"0xeb12489b3774bdb4cfed47bf187457b6b0ea73944245934f0a4aa11df7c11391","isrc":"NLSU32300014","name":"The Great Pretender","registered_at":"2026-06-10T18:31:12Z","spotify_id":"2OM9gqdX6nWMjPAcfVp9kF","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb12489b3774bdb4cfed47bf187457b6b0ea73944245934f0a4aa11df7c11391. 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/2OM9gqdX6nWMjPAcfVp9kF.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/2OM9gqdX6nWMjPAcfVp9kF.
Beste Zangers 2023 (Aflevering 2 - Mell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4e34f21bc3ab5b6103484a372e6886ed914e77c150d5159e126d06e3193c69. 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/6CLNsWSuqXFg6mTYcWnivD.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/6CLNsWSuqXFg6mTYcWnivD.
Beste Zangers 2023 (Aflevering 1 - Douwe Bob)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f365bc742d73b0fece08428b29fa350901117e90fe3df60da84b27114522775. 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/3bvoxX2yaOEYhID3YZ4ed4.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/3bvoxX2yaOEYhID3YZ4ed4.
Beste Zangers 2023 (Aflevering 4 - Duncan Laurence)
{"copyright_id":"0x5e6cbc679add50823fef117a9a68b943b0071bb3d8deff9007e74ff3b430f687","isrc":"NLSU32300022","name":"Always On My Mind","registered_at":"2026-06-08T03:53:51Z","spotify_id":"2x28Cxgf6HRJaZLXOCIF8E","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6cbc679add50823fef117a9a68b943b0071bb3d8deff9007e74ff3b430f687. 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/2x28Cxgf6HRJaZLXOCIF8E.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/2x28Cxgf6HRJaZLXOCIF8E.
Beste Zangers 2023 (Aflevering 5 - Numidia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6172f3b2eab9f2cf9a9215524e3f224488dcf603c1303997590847a94ba7ad8. 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/2cEzdgxq48ETDovtFPdflj.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/2cEzdgxq48ETDovtFPdflj.