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 0x20bb713fdf2d20baf9cb10f0bdfce46b6d29f75d6b823a5290cfad18fba7890c. 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/ef21c886-c67e-4416-aca7-9c35f2f48a5d.json and https://artists.proofprofile.net/proofs/artist/ef21c886-c67e-4416-aca7-9c35f2f48a5d.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 0xf52f61afdf929eb839f3661a0bb802055f2273925a6e2f912636532a7579690f. 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/1TIDsjhaR1533i3JZKxi38.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/1TIDsjhaR1533i3JZKxi38.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e99854d066c79054d1cd11d50ae040e0614b8b100fc5600010fc3cb55e5235b. 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/64LlFKb2uvZMRwYOAqNwj1.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/64LlFKb2uvZMRwYOAqNwj1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76e6faa54b9805b7c1a3134fd37a4e544a746cdeb11cd4be00d635cbbc4470d. 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/7J4JVCF1scdUfbPK1zI7Fj.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/7J4JVCF1scdUfbPK1zI7Fj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef65808c2362c3f023000076d2551126aa8483ea4fe83c5a985f34a165a23e71. 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/5xQ146Ctw9Zvb6hoszlsZD.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/5xQ146Ctw9Zvb6hoszlsZD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4283f490ce3e37da73b60213822b2c38d6a8b5543050ff7509c605eece57483. 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/3ZWX8NTvmUdJ38dwpegOUf.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/3ZWX8NTvmUdJ38dwpegOUf.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c59c73e6de728ad51fd9740ae38dff1918e164292f103dc674fae78dcfb6b3f. 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/3EAKs9Jh7IFqznhkZ1nt8u.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/3EAKs9Jh7IFqznhkZ1nt8u.
{"copyright_id":"0xa6ba7045ab5f519f534e1bf0c312dcd2a9e6bb7d652cdf614d58b86ac067de09","isrc":"CA5KR2472224","name":"Proof of Life","registered_at":"2026-06-10T03:34:52Z","spotify_id":"62UpgRmqd1bMoR1Z3o3pVe","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ba7045ab5f519f534e1bf0c312dcd2a9e6bb7d652cdf614d58b86ac067de09. 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/62UpgRmqd1bMoR1Z3o3pVe.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/62UpgRmqd1bMoR1Z3o3pVe.
{"copyright_id":"0xc76e6faa54b9805b7c1a3134fd37a4e544a746cdeb11cd4be00d635cbbc4470d","isrc":"CA5KR2376902","name":"Hold Me","registered_at":"2026-06-21T01:43:16Z","spotify_id":"14K7nGlou5KVNUGEeLFGxN","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76e6faa54b9805b7c1a3134fd37a4e544a746cdeb11cd4be00d635cbbc4470d. 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/14K7nGlou5KVNUGEeLFGxN.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/14K7nGlou5KVNUGEeLFGxN.