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 0x85f109c7ad832faf963a3608c1b4ad64eab5e5a1d232a934ee114c753781d252. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4068cf7-5058-4de8-ac67-f908c7eec4a4.json and https://artists.proofprofile.net/proofs/artist/d4068cf7-5058-4de8-ac67-f908c7eec4a4.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 0xd79397b307826e6d0e4abba29507ef7ca762a2ca1c829a88ade31caa3cf53aed. 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/6R43rsA9EMFH4qU25Y0XNJ.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/6R43rsA9EMFH4qU25Y0XNJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52fa3bfe470c1e6139771a6c84302792a26430d46f420aa2248096093b945ae. 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/5GWNGBHOC8Fs18o5F4kNNP.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/5GWNGBHOC8Fs18o5F4kNNP.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d56cad7959b591820862927bba6d2184da0b166610a79559ed8afc695c93ff. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/58szalDl866ldP4MRdvMVL.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/58szalDl866ldP4MRdvMVL.
{"copyright_id":"0x2d25179a4bce86c1e6e0d7800c6c661c88f4af0fe00b5d6f2cb6bdc1986183bc","isrc":"FR96X2181038","name":"Sem Calcinha","registered_at":"2026-06-08T20:20:39Z","spotify_id":"4Itnhb3PoldsFK4kgu7RNw","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d25179a4bce86c1e6e0d7800c6c661c88f4af0fe00b5d6f2cb6bdc1986183bc. 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/4Itnhb3PoldsFK4kgu7RNw.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/4Itnhb3PoldsFK4kgu7RNw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62359412b6cb6a62946d4d164bb29ad2f87f02188e0f7abc7114882df1c39ca7. 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/4dr0AjgSS9kfTD9U8bfOnF.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/4dr0AjgSS9kfTD9U8bfOnF.
{"copyright_id":"0xeaf49506c258afe023dbded2084ba1fccfbb3649894da0a6afd20d109f9d2e87","isrc":"FR96X2181040","name":"Juma Marruá","registered_at":"2026-06-08T03:22:21Z","spotify_id":"69GJRlhDtyaOnSGL7tQhhw","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf49506c258afe023dbded2084ba1fccfbb3649894da0a6afd20d109f9d2e87. 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/69GJRlhDtyaOnSGL7tQhhw.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/69GJRlhDtyaOnSGL7tQhhw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d7275a29bd8449c2b106bc9cacb44742e52ca72967ae72c4a0c95353223a94. 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/7eIfnbitmJPHXbSeyjzVlC.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/7eIfnbitmJPHXbSeyjzVlC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5a789374a776bcf4d514c919c336047b424c93c59ce36c3520204caaada51a. 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/3R7u5QHAGWLIfk4cguiKaR.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/3R7u5QHAGWLIfk4cguiKaR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc2608b736940f234a5ee319495284dc7f24e27f9f286be6410562c3068c937. 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/5EqsaI4AK0lij7cfXrgcqU.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/5EqsaI4AK0lij7cfXrgcqU.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8619b957ade58a17ad4e00b3ddc0b0886b15e3672ebd9d39d08b516556b3722. 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/6FA0auhg0L75rRKIoYwpAx.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/6FA0auhg0L75rRKIoYwpAx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b77a6d2272d8a686e434a80f4ed681659600c36fb797d7e856ee1c28f365d3a. 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/5VoMWPTG7cAXonm2A3XcAq.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/5VoMWPTG7cAXonm2A3XcAq.