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 0x44002c23ea466518c9c9bb89e08867ee0ecbe785b264cb605cbe90f5b78e2d04. 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/d384778e-5294-4e3b-87a2-760aeeee1558.json and https://artists.proofprofile.net/proofs/artist/d384778e-5294-4e3b-87a2-760aeeee1558.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x008e64cce858674ab6a39ccc91b5ead1f4ccb9dbdcd41c83374b39d383b6ad9c","isrc":"QZHN71947981","name":"Let Us Adore You","registered_at":"2026-06-26T03:14:06Z","spotify_id":"7FcedJScywCuRKrOxoNXgH","type":"track"}
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 0x008e64cce858674ab6a39ccc91b5ead1f4ccb9dbdcd41c83374b39d383b6ad9c. 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/7FcedJScywCuRKrOxoNXgH.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/7FcedJScywCuRKrOxoNXgH.
{"copyright_id":"0x267ee745d177b4a73dce01d66939719da0e911b3f16a7e129fd3feeccceebf4a","isrc":"QZHN41913788","name":"Other Friends","registered_at":"2026-06-26T03:13:04Z","spotify_id":"5XYdXzOZqG7BgG3cM12GlV","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267ee745d177b4a73dce01d66939719da0e911b3f16a7e129fd3feeccceebf4a. 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/5XYdXzOZqG7BgG3cM12GlV.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/5XYdXzOZqG7BgG3cM12GlV.
{"copyright_id":"0x545f89dd9a0bf4258452ec2a15b4c678c5f8532fd98a8ccc071ffe6dd843d58b","isrc":"QZHN31987940","name":"Super Mario World, Castle Theme","registered_at":"2026-06-22T13:33:32Z","spotify_id":"4IqcjWGaxBK9YzT3xBjAzf","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545f89dd9a0bf4258452ec2a15b4c678c5f8532fd98a8ccc071ffe6dd843d58b. 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/4IqcjWGaxBK9YzT3xBjAzf.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/4IqcjWGaxBK9YzT3xBjAzf.
{"copyright_id":"0xe4b66587540ecfeaad3fbffe73bba4b89ebaf19ce352dd3ef28e8064da91d0c1","isrc":"QZES81911027","name":"Yoshi's Island Athletic Theme","registered_at":"2026-06-07T22:44:09Z","spotify_id":"73UNZz8wCcTzvGlK4867Yc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b66587540ecfeaad3fbffe73bba4b89ebaf19ce352dd3ef28e8064da91d0c1. 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/73UNZz8wCcTzvGlK4867Yc.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/73UNZz8wCcTzvGlK4867Yc.
{"copyright_id":"0xc3faaf73799ae03dac46d30d0e0d703d1477aaf192b70bbb1f1b985a2d3f206e","isrc":"QZDA41965596","name":"Beware the Forest's Mushrooms","registered_at":"2026-06-09T21:27:26Z","spotify_id":"7iUsCDzqLzI1WvefhJiCyr","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3faaf73799ae03dac46d30d0e0d703d1477aaf192b70bbb1f1b985a2d3f206e. 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/7iUsCDzqLzI1WvefhJiCyr.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/7iUsCDzqLzI1WvefhJiCyr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6706e79e0823b813fb39fd920d59eae1660be6b68d8f58083572f4276570e07e. 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/0zt08zzzxA92pYxn3BRv8Y.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/0zt08zzzxA92pYxn3BRv8Y.
{"copyright_id":"0x3cef9ea6f83efd0c4b2afef841e2e04d0aa7090380049bfe9538d21ea4573284","isrc":"QZDA51915114","name":"Megalo Strike Back","registered_at":"2026-06-23T18:09:01Z","spotify_id":"1Ek8nRGqWFp74hTcLOgQRm","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cef9ea6f83efd0c4b2afef841e2e04d0aa7090380049bfe9538d21ea4573284. 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/1Ek8nRGqWFp74hTcLOgQRm.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/1Ek8nRGqWFp74hTcLOgQRm.
Just Another Hero (Boku No Hero Academia)
{"copyright_id":"0x3f2b95419be29a3cabb4ce8df13df08f411dea3e5ce68834016a720b78686f0f","isrc":"QZDA81859565","name":"Gangplank Galleon","registered_at":"2026-06-27T19:17:20Z","spotify_id":"3FxliBGXOqlULO7GlCUFUE","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2b95419be29a3cabb4ce8df13df08f411dea3e5ce68834016a720b78686f0f. 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/3FxliBGXOqlULO7GlCUFUE.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/3FxliBGXOqlULO7GlCUFUE.
Uncontrollable Evil (Boku No Hero Academia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b4085825895d59831c08a6c2afdc748fbef8e0c35ce2daf2da844d63ed40c7. 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/3lpaIN1ZMNw01Oj8ViSZ7l.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/3lpaIN1ZMNw01Oj8ViSZ7l.