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 0x1203dbfd385c108b8b0216ec1611635172be1019842c51022987ddf712a34035. 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/9cd3a2f7-f504-4060-9dbc-f4ad599c6700.json and https://artists.proofprofile.net/proofs/artist/9cd3a2f7-f504-4060-9dbc-f4ad599c6700.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x0acca3b2f27fa5c3353c734be3c4661bedc26a9e351de6570ca43c3819ce93f3","isrc":"TCAFX2193748","name":"Grass Jeans","registered_at":"2026-06-29T07:21:12Z","spotify_id":"6Ga9tU59GhK3j6mWwGAamy","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 0x0acca3b2f27fa5c3353c734be3c4661bedc26a9e351de6570ca43c3819ce93f3. 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/6Ga9tU59GhK3j6mWwGAamy.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/6Ga9tU59GhK3j6mWwGAamy.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57da92e7ea503a07d158fa7c6a8dac9e174e9dbc845ea5303133d7ee424b018. 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/4RdqVrjTnuEms5pgKNG95q.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/4RdqVrjTnuEms5pgKNG95q.
{"copyright_id":"0xdfe0dd298478a9e7bb3d4c353e85ba035cb6c07b652bc05ecbffe68ad9a5ef41","isrc":"USMTD2300381","name":"The Candy House","registered_at":"2026-06-29T07:18:41Z","spotify_id":"2VLHjTBWXCYVGpEJLskb2S","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe0dd298478a9e7bb3d4c353e85ba035cb6c07b652bc05ecbffe68ad9a5ef41. 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/2VLHjTBWXCYVGpEJLskb2S.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/2VLHjTBWXCYVGpEJLskb2S.
{"copyright_id":"0xf9d97b316cb98e2897b4f3bd2d5360847312cef1466dd1bbcbf8b0ff76d25063","isrc":"USMTD2300382","name":"I Don't Miss My Mind","registered_at":"2026-06-29T07:22:34Z","spotify_id":"6PYOEkFOPsuDvAByWYJeaW","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d97b316cb98e2897b4f3bd2d5360847312cef1466dd1bbcbf8b0ff76d25063. 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/6PYOEkFOPsuDvAByWYJeaW.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/6PYOEkFOPsuDvAByWYJeaW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57da92e7ea503a07d158fa7c6a8dac9e174e9dbc845ea5303133d7ee424b018. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2BeH3ZyiCmvBYrw53fZ59a.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/2BeH3ZyiCmvBYrw53fZ59a.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d3f6ac585f7789bc4b5c8a0ad93d469286e8dd185a915146a60c1a0d5028d9. 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/5EWjjUATjXaF42lrfHmqz4.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/5EWjjUATjXaF42lrfHmqz4.