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 0xf5d98f74eb60599ea9cd0a6037450e92d31e672ae16533a31b4bc87be2782055. 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/ab43a1a8-f7c9-4971-88e6-501ecd073e1e.json and https://artists.proofprofile.net/proofs/artist/ab43a1a8-f7c9-4971-88e6-501ecd073e1e.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 0x32487e775f9719ebfdd3f865b1d01e58a4a8b0f0999fd497dd1da19c317cdb6b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062407496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba43d455ee89391eede7f478a8a993a6d82dd7e34ada8b2b769d5d5a963001ee. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062402776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa2beb71388bdd0dc8666136895b9040084ca61d58f215cfac8ed9a00062e5d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC062418068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bb09f454cfcb1971e6cd488a62b15ebe82b858aec971a9cd0eae151e5de298. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PL2DY2400298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd619f878deb8e2c41e74c2294f7fde682263c08c9529e1ee505bf6a8e4e52184. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccbb93c0b0ce0d9db24034d5ec89d56130b2a34dd28bf8a474bbcee2fec4ef3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062424298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad21cedc32611e775ce4012d6b8702ac898d9680c94e5f0e468fee2f552fb5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f42e6be316b1baf569597adea599f5df908c5b6ff35f137301553f0a0070a96. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062424299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ea6e4d1a7800893c3aa52525aca45a8fa14658bbcf71ebd04231b9712d53e5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC062424301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb636d14bbf65e28f9b28162c8432e329e5755894d93f6dd4cef60dd975f9a93. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC062424302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c41c91a0b3d1e4881ce122326094ac917221e15c5a5838dfc5b16b1d4a2914f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC062424303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b03138c5471fb176c87fb193262ac53afacf55fd6ef3fed34ff8fccada8ece8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062421963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91afa19e7b33cf804005e6b78b4b2b7ee35257554af32853d8dee2342e7c3100. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062424304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33adc46f8bbe53e2e3c230fcf2029c3d67d075f4e9e87ff7600e9a767e72a01e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062424305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dea814b578b00a2b4bd8553bf2b68ad0b3cc41acc28a39e04e4aa03f24ee9ae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062424306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912b8862383ffefa7e22da1eb28aff7ae8c7f0c04098e23cbf7a6c21bbbff0b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf15ff018345e1f12ca9a53f505dbe5ed78f0a405122bd2a490423a3ebce6562. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0df3f75e613a95851067691c28dea67fc635688d67cd0f38e53b67b272c9a33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062420937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e83a8041be4afe4e7144ad6ae233084a8ac147f9b18a9c2a8dd8bc2879dbd20. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4907c831baea2335f6fd87ccb26862306f2dc3986eacd9871140f97aa3c3a6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646325714b8c51c9c0c5fe28c0e30e5e4a64fc494c5531f54aef560ef5c387f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062424311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7c1237271ea2e61d57457cfc084859bbc8472a1213262491c64226df5248b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062424312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe265b1bc3d019e70c154904ba481b7932129e8b2bf0bb2428f76f0bb50450bb5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLF242211513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9baac1b3aa2b5e29929a1f0f80e26c1765bc10babe3fc0e44d2b1bf6518b6fb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062426936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8410feb31ab710a9e654d06ddf32ce13e031ea72586046857ee16417e91b2a88. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062421226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a036308035a87fd178ee093f87174b7467d573483bfb6eeac8f542c44a9610a. 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/PLC062421897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722048b949d2fc0736539eb3777d332a848a200d7b3e3e78d7c73cfff4781831. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLUM72400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeafc796a9e0d3abc490bdeea788ea5ac837c540ef9c0f8c7a765b20a25d0b29. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC062413630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22940d5d0c53a8cb9adf3afa6b3b3d18eec79547b7c75f7bd831ee3b51707bb5. 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/PLC062505267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca49e41a0b2fa8c6db19f078390f1306878a7f1b60d441e978c7866d1897d4b2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLF242414204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0122c1c0b744b72c19c576d0c5c6cf019cd0a790a29e78d96def77ff03d017b0. 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/PLC062438758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8818062c5607e58d0adb12f8f095ff709300e015351ac5048cb4f2ed9d312c8c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PL2DY2400938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a1791d44af7d368cefe91786b3c1699e301e3a126c36f34507add51f3e8aa9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PL2DY2400939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe265b1bc3d019e70c154904ba481b7932129e8b2bf0bb2428f76f0bb50450bb5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLF242211513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd0c9b3497fdcfaa5cafa4909fe1e01f19d40b0d30b9d3daf0b0030336e8b2a. 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/PLF242211693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5aae696c6d8eecc6c613648409d6c4d6ad88f4e55481f98fe38bd5076b7111. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PLF242211694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ab8f8284eaa7cb7c75a4a7485859ab9fefff760391be5bea3ff5db69340974. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062383041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113cb558a3b791407972edc0d3ecdf1154494a398e1831cb4966ca588bf38d87. 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/PLC062383044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6483ea955e0242da5bf8cf80c83bce487c165085d43ffe217d999bd6716e6c64. 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/PLA552400423.