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 0xda461a330574226fad9f6646ea28ca29cf9280085cb88209550082545f85d37a. 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/df8a88f5-880f-4a44-92b4-771000738272.json and https://artists.proofprofile.net/proofs/artist/df8a88f5-880f-4a44-92b4-771000738272.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 0x2f8e71667d6077de35b1273837e2020f978fe0a62d37ff07d2a404c042159c45. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/63QFefp1nfsMgjhanmJ5rL.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/63QFefp1nfsMgjhanmJ5rL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8e71667d6077de35b1273837e2020f978fe0a62d37ff07d2a404c042159c45. 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/5Rp2ZSN05YaAnoDJLZkaoM.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/5Rp2ZSN05YaAnoDJLZkaoM.
{"copyright_id":"0x8d839dc810ffc5777cbfa29c6163097003fbcc99f195078ee73f2889b5ae5d24","isrc":"QZHN52251374","name":"it's hard to be me","registered_at":"2026-06-18T20:26:03Z","spotify_id":"35MLbEUGDNNKnwvkqAFZSR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d839dc810ffc5777cbfa29c6163097003fbcc99f195078ee73f2889b5ae5d24. 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/35MLbEUGDNNKnwvkqAFZSR.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/35MLbEUGDNNKnwvkqAFZSR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d839dc810ffc5777cbfa29c6163097003fbcc99f195078ee73f2889b5ae5d24. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4jbAkxv7WXJAETzwI2grVt.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/4jbAkxv7WXJAETzwI2grVt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8b60140c59b98be31b35114800ecf6e602f9f5e7258e0d502d3c711a1fcf60. 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/6CgGtIaqFTBSMgzrFGar4M.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/6CgGtIaqFTBSMgzrFGar4M.
{"copyright_id":"0x2b0e4ceaa72ac671d3b71d536dacf1b76f61c2fd7d66237c7039a95e60a93b3c","isrc":"SE6I32303814","name":"Forever A Tragedy","registered_at":"2026-06-29T09:43:42Z","spotify_id":"6gkNikGYKOt1n5UvysCAQ5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0e4ceaa72ac671d3b71d536dacf1b76f61c2fd7d66237c7039a95e60a93b3c. 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/6gkNikGYKOt1n5UvysCAQ5.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/6gkNikGYKOt1n5UvysCAQ5.
{"copyright_id":"0xd1ee2aaf6bf30f71be2b8251a8f88852f5c4426fdb146bd0b240b6751ac3e031","isrc":"QZPLR2112523","name":"kissed a goodnight","registered_at":"2026-06-21T07:38:40Z","spotify_id":"24vDNsm7poAiwvcQnzKUHr","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ee2aaf6bf30f71be2b8251a8f88852f5c4426fdb146bd0b240b6751ac3e031. 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/24vDNsm7poAiwvcQnzKUHr.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/24vDNsm7poAiwvcQnzKUHr.