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 0x8d1ed732effbe7015030f10087bf57570a964f5510651ec44a031d2395515b0e. 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/9b36bf08-f181-48fd-b155-33728e79295a.json and https://artists.proofprofile.net/proofs/artist/9b36bf08-f181-48fd-b155-33728e79295a.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 0x259ce41052db8c2376c2ce64c4cf29d86abf1380f0488d0a0d3a3735b57d6d90. 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/0rKowFgL5ZcCH2RZiIcXc7.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/0rKowFgL5ZcCH2RZiIcXc7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd728e1d1f30ec97256ea6545107a9542d87a2237aae6dae6f9699f209e2edeca. 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/0kl68XfbVKbDuU6NC6z8pk.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/0kl68XfbVKbDuU6NC6z8pk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094aefb94121b010ec21848ef02987656f1f271c6b8f552c2ceeb7a61567e712. 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/3eshtO2aoj1WBihwrn0b6c.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/3eshtO2aoj1WBihwrn0b6c.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e22e78d8bcab74212677b95dcfec88bf0d6148507368e843d4a28fa450a260c. 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/3HfFxA3eIa6xGKVWf2vWwH.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/3HfFxA3eIa6xGKVWf2vWwH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b2ec86913eaf0babb0e193861961916dd3e9e91c72790e36741f3e2ed54ffa. 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/2qKZuu7zSMKoSiM7vE58Ez.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/2qKZuu7zSMKoSiM7vE58Ez.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bb5e4c58a39fad953687267dc84afbca8565fe6ddb86b157149fecf1981239. 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/6vQF3zZ19KSQgDL4P0WTku.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/6vQF3zZ19KSQgDL4P0WTku.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c209c30901165d249385b9d7a781b8399b6bc82d93bddae7e3778a0580f324. 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/7ncHHrIgk1EAt80uVVsHIF.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/7ncHHrIgk1EAt80uVVsHIF.
{"copyright_id":"0xecac1d93968ef9267ff4f40a7802913faf20385244903a8c635eebb0eabd36d3","isrc":"QZ5FN2086855","name":"Who The - MeSo Remix","registered_at":"2026-06-11T16:53:29Z","spotify_id":"2pkEBDUxfO80R8eeZozVic","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecac1d93968ef9267ff4f40a7802913faf20385244903a8c635eebb0eabd36d3. 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/2pkEBDUxfO80R8eeZozVic.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/2pkEBDUxfO80R8eeZozVic.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99043aa5e888b48f1ee7aa6b0e037ff9d3ef1a1bfb0371fb61ba78f454383c2d. 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/428XPlrL2oCitRcqTB4Nh5.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/428XPlrL2oCitRcqTB4Nh5.
{"copyright_id":"0x6b4a1fbe5705051daabe7abd6c6e528c4bd1c6ebf2404cbfb1cf05bdd0f7a892","isrc":"QM42K2015818","name":"Space Cruise","registered_at":"2026-06-19T16:28:31Z","spotify_id":"7ISifWn7SNMIUWt2oveGFc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4a1fbe5705051daabe7abd6c6e528c4bd1c6ebf2404cbfb1cf05bdd0f7a892. 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/7ISifWn7SNMIUWt2oveGFc.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/7ISifWn7SNMIUWt2oveGFc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744354ec84620800765b64a0d20ed1d273e71c4b4ca05cdb8722385a428b1247. 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/7dlFqN4kae62aQnyRoq6N2.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/7dlFqN4kae62aQnyRoq6N2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a5435cb06ef688efdfaaab5a31bc1f8dc3dc5fa949ac9f339689dbae683388. 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/45SNl9cue6YbPGt98iIYlr.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/45SNl9cue6YbPGt98iIYlr.