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 0xb246a5aa5628a44fee02bf059ec7f2a54389661715e2b8c0a0cda562bf607d18. 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/2d782939-c2f8-4249-90e8-66665ab06624.json and https://artists.proofprofile.net/proofs/artist/2d782939-c2f8-4249-90e8-66665ab06624.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 0x0355a124f23b794b0670c01ba89a096befb92238b6e12cf291c557d910ea0f43. 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/6i0ZAtTlvVmvERuC0cqH2p.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/6i0ZAtTlvVmvERuC0cqH2p.
{"copyright_id":"0xd82224849dfe33605a107e5210c33e351c5ffd7c52ea5cce070c8accbcd378d6","isrc":"ESA011527400","name":"Nintendo - Neim Remix","registered_at":"2026-06-29T03:29:50Z","spotify_id":"4aZ8MbqTDNikRYttTTtoYv","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82224849dfe33605a107e5210c33e351c5ffd7c52ea5cce070c8accbcd378d6. 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/4aZ8MbqTDNikRYttTTtoYv.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/4aZ8MbqTDNikRYttTTtoYv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b40f7aae557a24b0baf00f181bc25bdcfb7b66f4440811d942cd12661bc488. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6n6c1mN4y6o5q03fHwHLwo.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/6n6c1mN4y6o5q03fHwHLwo.
{"copyright_id":"0x581c46b42a803cc3e6fedbc27fc927ac6f64a92cea5b4ae0d3a95310152ff681","isrc":"QZGLS2236766","name":"Tumbao Añejo","registered_at":"2026-06-10T18:38:47Z","spotify_id":"4G5QfMMpYwaSPrsWlSJShc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581c46b42a803cc3e6fedbc27fc927ac6f64a92cea5b4ae0d3a95310152ff681. 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/4G5QfMMpYwaSPrsWlSJShc.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/4G5QfMMpYwaSPrsWlSJShc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24afbf17d415d23579e5ad03d4068c7de29c39c5689e9960cc47fdbbf1b5075c. 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/4tDRwNu6ToO4S9Y7Izvgmz.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/4tDRwNu6ToO4S9Y7Izvgmz.
{"copyright_id":"0x320d471b55f348e0f1add8425e965a6cd5905c60beda0273ee300b5a9ae731c2","isrc":"QZGLS2236769","name":"Papaya Haze","registered_at":"2026-06-27T05:57:29Z","spotify_id":"0BHrhDT8gmICDd4PfhdwAY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d471b55f348e0f1add8425e965a6cd5905c60beda0273ee300b5a9ae731c2. 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/0BHrhDT8gmICDd4PfhdwAY.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/0BHrhDT8gmICDd4PfhdwAY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22540ea3e92c51b00bb0e4269a1b36ad91749970b931467fbaad41225bb3ce52. 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/1F8rPX41e7av1xr8dzoRCC.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/1F8rPX41e7av1xr8dzoRCC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd73e43690300486136ab3f2b13f7f9f828c767752a9045361cbaaae2be070d7. 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/0cBl8AWxVHaVlbzsufHqBa.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/0cBl8AWxVHaVlbzsufHqBa.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f0f4585352dc4e2912f459c14dd61aabbc258720f4c61964126919898efc7a. 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/7J2yeItmEkqv151JWxoZCJ.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/7J2yeItmEkqv151JWxoZCJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0772714f1260633ccfb9a6aa25185fe38e8456658bce9a913122cccb763a28. 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/5W4xh7nSW6niHXGCc7Mli7.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/5W4xh7nSW6niHXGCc7Mli7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593293436d3ca97bde142e47bb28e2e5b5b5b9f171fe4b382af169ae9bc4a8ca. 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/162FcTi0XvWrvyVZa7BqnK.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/162FcTi0XvWrvyVZa7BqnK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bee581feae4ae579887139a348be6cd886cf08129e46c318c5a800086516c5. 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/043Tw1uWcOcwdmvQGhZ96x.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/043Tw1uWcOcwdmvQGhZ96x.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1a63a1eaf58bfef33005c89a743375dc389d7704e7d5ad3dffdaed7f213799. 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/33uTnNh0E8VL96xT6X9sMy.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/33uTnNh0E8VL96xT6X9sMy.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab61bfbd6493f0cc6f93d6861963b472bf5bcab76b5b08b6f0f2ae92d0c2dbca. 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/4DeOKMql9HCxR0mtgjfbMG.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/4DeOKMql9HCxR0mtgjfbMG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa3f0795f7fd6d7d87ba65a54919b29f28818ff427a84e057a9cf11d76860c4. 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/19iJd9teOqGRvFiwE4rnjn.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/19iJd9teOqGRvFiwE4rnjn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a2475c620e2ed3b45458a01c5c7b5fea155f1aed72b4dd7b687276651bfb42. 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/1EUW9S0g1jKP4P4KLkrN5Y.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/1EUW9S0g1jKP4P4KLkrN5Y.