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 0xd93dcf940654e1ede4997fda3435ec5cf401c6202b40be7f83e0c5ccc4c5ab7d. 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/24ea26fb-72eb-4e25-8006-c2038f9177df.json and https://artists.proofprofile.net/proofs/artist/24ea26fb-72eb-4e25-8006-c2038f9177df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xd385ccdeb324a0ce1440317a3fe54d976af89ab5eba83060ddcd7b6e7dae860e","isrc":"US83Z2342983","name":"In the Dark","registered_at":"2026-06-09T09:17:51Z","spotify_id":"30LrETP4JArQ3nQVbu1sHg","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 0xd385ccdeb324a0ce1440317a3fe54d976af89ab5eba83060ddcd7b6e7dae860e. 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/30LrETP4JArQ3nQVbu1sHg.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/30LrETP4JArQ3nQVbu1sHg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e066fc46346eb78440dc9e0075614579545c9b269b0eca3f76286075cbad4e0. 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/2jIGs1cgvEo1YrSaBEraFk.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/2jIGs1cgvEo1YrSaBEraFk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff42c084c7d7abd5ca1d8474459472109e2d42402f799c3c5c97c3eef120659. 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/5NGJeREqZhesJemeH5nnWG.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/5NGJeREqZhesJemeH5nnWG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e90d36796ba3b7dcc4d65342cc475a3ef8cc31095fea4f456986f35ad235b4. 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/6Csbnw9I41lHMsnisshfdn.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/6Csbnw9I41lHMsnisshfdn.
{"copyright_id":"0x4c69964795808101d2ab4efd9494df8a609ba9e0d25cfc0b5bc2e2ccb7e668e0","isrc":"US83Z2397315","name":"Back for Some More","registered_at":"2026-06-23T10:44:42Z","spotify_id":"60UBxTkhJX3r1h1MK3uMPn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c69964795808101d2ab4efd9494df8a609ba9e0d25cfc0b5bc2e2ccb7e668e0. 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/60UBxTkhJX3r1h1MK3uMPn.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/60UBxTkhJX3r1h1MK3uMPn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ea086b603b6fa4a598b1bc2d6825701195da2304237534dbaa2f1a00dfc649. 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/32buG3FTO1o8H29ZV1kXUK.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/32buG3FTO1o8H29ZV1kXUK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5817e20074645e7996a520be2fb5fe944ed2a9fea9c64eb6f9342720a446c29. 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/3EGLijDvUQhEhIKKlyaJbX.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/3EGLijDvUQhEhIKKlyaJbX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a11659dc19d3d3c9e0995f5e12c11761ae2a74301628709e6a4422d8f0ce6f. 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/50exsmvHTz2NmO8xXN4kMz.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/50exsmvHTz2NmO8xXN4kMz.