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 0x820bfa270bf80d0afc4595df02ed2b0b88cabb03f38c1045e1ee1bc63bdea111. 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/3a49b74a-0d94-4efb-95af-f2f7d2356162.json and https://artists.proofprofile.net/proofs/artist/3a49b74a-0d94-4efb-95af-f2f7d2356162.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xb2a32e1f0485f24882eac147eb66996b2d2cc1ba1a058a3adda12b2bab65ebfc","isrc":"FRX872439379","name":"Midnight Jam","registered_at":"2026-06-08T15:54:23Z","spotify_id":"2QNVjc2sTQcjjgVephuqbD","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 0xb2a32e1f0485f24882eac147eb66996b2d2cc1ba1a058a3adda12b2bab65ebfc. 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/2QNVjc2sTQcjjgVephuqbD.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/2QNVjc2sTQcjjgVephuqbD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba6b69da3149319ca10c1b2d449e5f86151840ab7a8d331a5f6a67ae2466b18. 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/0SRZ9yFAk2aIBLi759otKb.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/0SRZ9yFAk2aIBLi759otKb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ec24c6d6813a8da4a041679676127c354c48179ded461d3ce6f417917fc704. 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/5Y2a2wCm5rIuaRtX5DA4Lj.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/5Y2a2wCm5rIuaRtX5DA4Lj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544dd2be76c48c153af034ac5fc24bbf2b784586233762102cb08e15c8fe9e49. 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/4PgMueY8devjugfBXXn9Ke.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/4PgMueY8devjugfBXXn9Ke.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1123e8e04ebc439d9a919902c8af59c545413e98a09f58d09a49169ce0165f. 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/7KOhCnRqR1lb3SAlPlzyyG.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/7KOhCnRqR1lb3SAlPlzyyG.
{"copyright_id":"0xc514bf722623baf7bd3fe9447fd21c0a9c5b2017e5ffbd75d20950be37ffe1c0","isrc":"DEH742443383","name":"Echoes in the Woods","registered_at":"2026-06-04T11:42:02Z","spotify_id":"7zEpXpNgeTPzmBvTff40sP","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc514bf722623baf7bd3fe9447fd21c0a9c5b2017e5ffbd75d20950be37ffe1c0. 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/7zEpXpNgeTPzmBvTff40sP.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/7zEpXpNgeTPzmBvTff40sP.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3988f1248aee5788db8fa3ca33dc762056bcf6fba51e741e50678b2c74deaa41. 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/6yYP4beEaWg7I8PFQmDZFG.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/6yYP4beEaWg7I8PFQmDZFG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9208796a5b9b783a70dd84a06aa9e0f4b800d649cc75311af045856d1374f0b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5b6f4cxX26hxJ1MI9mym2D.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/5b6f4cxX26hxJ1MI9mym2D.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033cfe8666f8d9fc943cd39aa5f62e4f96c5914c34e6d03c7ac0d3ad826cf339. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5Mm5q1jwVjl7NetyaQjomz.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/5Mm5q1jwVjl7NetyaQjomz.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefa153b9e5c0ee83c7b512b7da5d29593ca9e8f27a5e1ab4af0bb7019797446. 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/0SoD4Rb340j9oInZyHs027.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/0SoD4Rb340j9oInZyHs027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10d950d5ec91c814417ef712ba4fa8b3d92c3c82cad77f177c71905eac4ddc4. 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/6mF7VxvbpROZYXWYALCXym.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/6mF7VxvbpROZYXWYALCXym.