1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0x79898c7c1b76098eea166dc2e0591f9321e2cb6fd610989bf61c4fc0740e42ea. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/248a6566-9916-4c98-8ed8-00977194a84f.json and https://artists.proofprofile.net/proofs/artist/248a6566-9916-4c98-8ed8-00977194a84f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07457778f8190bb52dd75f50f2a7545fbbdfcbe40cc1a0805a6535891203f2ec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01771004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862e947194ab85485c0b17a89a3422ea360100957270b7f0d06a4fadfc4750d3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01771006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5615c9e95c3cacd7ed0a75ee7a2e7dae80931ca490b42e8223302439aaf7031. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01771007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b411b0c4010be534f185ae3bc39683c4773281cb29d48d2f0a7606fa1cc814. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01771008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b487dbd13696ae3a9178ef59c171d20b041602038b89b58482ed6ee8e0e5c1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01771009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c02f3412e1bbdf1828d0d9836b08de336ae38989ab8c04848bbd8d0d12bbc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01771010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abb9cdff6531e63ab54c91dc352bfbd51d7126d048dc911cbe20ee16dd1e8b1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01771012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9c16526f4f5fc943844030f8a45c7f15bcd68dc1d6b2d118af4439e97f7963. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01771013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edaaf14c19c8b2778bf9e69a0fa6cca73166140683be475539386002a6e0cd2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01771014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081188f7a8b02e678889074ded52f2297c508adc565c3965b18c94e718743665. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01771016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629854c4ee28e1fec337b204d9b8cda944a2c08788da94f9c9d0fd6a1e7340c5. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01771002.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4644ff0ffc702a459842d42de44f884f15b0d83518aa26a220ab8df14f802624. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01771003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc2c80b8e28033a0a04a8b3353432b83406cc7884b1e83d73fd97bf6186260b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fc3ad5ec03e4f5cbb8173e79aee54dc9138d814c27244ac66716e458c68007. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefce8f1f6a005fe4ae577b1047eb78cb117cd6b9d5efaff5ae99a64f03f0468b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d64eb7eb278ca7b7be06216c84f5cb5d1828b241b0feb0129a56d7e9e497bf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee3536b937d8f5d7e7d6a22fcd142b5016bf6c1856bc5a268f9d5783cbb7e1f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251eb40686fc4a669352854cc628f7d1613fe61307c412aa60fd2ba54421ff40. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909ac9f5bb20c1341a15540c370608256ed72d0b2b5ba0de3808d1180c2d6be4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bce97861b66426262800cb19bf4bb422fd420c4b6a3e867e24de497d2eb58b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf68f2b27bae24f9a6fd170c9fce35bd7eb13973c2bec3540a8f74d074b5060. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cca6d11158794828ee42fd9925f52cb88feb9ca1cfe4a6bd9603093f48877a5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7161bacaf73744efba9ceeedcee1a498ab6451b75f018e0565dfea7dd2f729a9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92503cd560d96c4442eac0256153b01a499622a6e5a905bbfedd51f87537cd6c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c887bea74f1b585c77e04ff87e53c0041ed81145fe1301f087e7407fcba6bbf. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c9c230d83799655b809ee0db46360b454f5ba1305b45a7072b7ad2b538b315. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7f927699ee44e8e3ffbd9fd30355d0beaeafe957f05b63bd08d5e7367ef27b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP01571377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba434985aca142f8e7598d9566e1e73609325a712602c6e83bbf7852a9bf111. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101403401.
君が誰かの彼女になりくさっても
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9114094dc9474f591cfcdefe35e56e2b571ab0031b103e39aac93864a3201129. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101403403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98113fd533e76e7e1c970e58bfca3c5be4b83253915b39b679a969a3fefecfa3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101403405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921148aa32127c81ae543a0bd90600826b782a687928a87ed2c7944098e4974c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101403406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f6b0b18b8ec34bec6ee40ddedde5f05ff00a58266612dc67bef43644b43be5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101403407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc823c13521562495c7937e984a1e5c1d5ce02cecc5fe1fa6eef9f9dd8e10ac99. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101403408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259372ed5cdb783a39898956ae6e8b2b761c00382a59b2d746b88e5b079dd29d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101403402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53489fca9c458ba8c4adc1e4d80396072034cc1e6df16d396063b6d59a43824. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101403404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c978245165a22f97914888136e9cbd48f2f15b09e5610468ae3fc8f2170caf. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101403409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69d3ec0c463b75f2e1f794aff5826416dd4e1f59c19be047c6daa45db995b46. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101403410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc489b444f0b1e5ca1f777b4bf118a0d71ba33e21d89bec79e41c584c9008428d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101403411.