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 0x604b4185db3bb3f7fa33873e836bcca839a9857235f4f6fab31529f2a113ff5d. 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/e8e97cd2-7d08-4b0a-9348-fdb5ae4e4390.json and https://artists.proofprofile.net/proofs/artist/e8e97cd2-7d08-4b0a-9348-fdb5ae4e4390.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 0x018f4cb432a4a456817f1849e1a3c994a3b941806cfa1dad312c5740aa70ad3e. 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/7AYctIsvlx9eNrOM2zhLiz.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/7AYctIsvlx9eNrOM2zhLiz.
{"copyright_id":"0xdb35f105f0e07bbf1add05f026351e6b47d2366f8ddc59945f35571cbf149382","isrc":"BRWMB2300250","name":"Qual Vai Ser (feat. Oscar)","registered_at":"2026-06-18T16:00:55Z","spotify_id":"4Zg3SKQm6BLkDZBnKsvTrG","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb35f105f0e07bbf1add05f026351e6b47d2366f8ddc59945f35571cbf149382. 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/4Zg3SKQm6BLkDZBnKsvTrG.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/4Zg3SKQm6BLkDZBnKsvTrG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abc328379132a8ee9dc7f3a7d8f3815d02da90932a35623dee7a7036a000979. 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/3llrUWJwxKj6b0r5ZsKL3Y.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/3llrUWJwxKj6b0r5ZsKL3Y.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56cd30dc4a06ac88d6b32e50c1181de48231ce7da2d109ed8ce33483a399b54. 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/0qThdM1EPdIDaDwpLiGNw4.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/0qThdM1EPdIDaDwpLiGNw4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588122cf0dd691be97a05458c4db7b4b69afd45f684f669137a1d224e021b1ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/42xeoNcq9QiTLhY7qCFu0K.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/42xeoNcq9QiTLhY7qCFu0K.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880f8590b6f1f55fe6dc8049e016b775e4b3106c729a0701044f1620dca2184b. 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/0SpNjAHqtybjYK6gFEdPIq.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/0SpNjAHqtybjYK6gFEdPIq.
{"copyright_id":"0xae14423bee60264a5d5c45f4758bfb23fcdedf1aafd842d6a3ab128c0446ab55","isrc":"BCIOS2400036","name":"Contra a Maré","registered_at":"2026-06-24T13:11:52Z","spotify_id":"6T1RsNipg2JvyfYrTDAlDt","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae14423bee60264a5d5c45f4758bfb23fcdedf1aafd842d6a3ab128c0446ab55. 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/6T1RsNipg2JvyfYrTDAlDt.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/6T1RsNipg2JvyfYrTDAlDt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e6f3840b725fad7d00d1e718b165ac290101feddb3e23f529a87e0fb23df20. 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/78lOxsDJRseTtkYxtIEr0l.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/78lOxsDJRseTtkYxtIEr0l.