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 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 0xe863d519f5f6c904bba9208f9c28dbc56b2205343903ff43375b961a80df5b39. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a04dc5d3-214d-4118-a329-4492a81c5595.json and https://artists.proofprofile.net/proofs/artist/a04dc5d3-214d-4118-a329-4492a81c5595.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 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 0xe8c6135af43bdb24dd20506e2d1a5182e247280a437d8b0834d2421118d6d4cd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ5AB2034262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa721832923c1bfd20c10fafd90ac54f8984d48f9f2b60f85f5eb763ffd1d3079. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZ5AB2034263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c9ce03193f32c9dc6f391a347b3bb48c76e95f84fa1c1b3e18eb1b99692e9b. 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/QZ5AB2034264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd307b2fdf68560e5b18df1da968364f143282ffd542673317a9c99f2bc25383. 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/QZ5AB2034265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470b901239392f0eaf0b2de5ce77b72314e3d43a07d74a060fc240555b2ae658. 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/QZ5AB2034266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b00c4fa23ee38070508be3f3e654a362ac0d8e2a7ac30e10c982274a6af1fd. 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/QZ5AB2034267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640ec91599265d232f1bcb171795b4905437c089dd6c5aaa4dc166e86c20b54d. 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/QZ5AB2034268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863973f6093a9526730357b7c43eb72da309b41d5bc410e8123bfef2fa86e382. 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/QZ5AB2034269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa845cee6f5836efc2d6f34c2d1d531b99e3485e548e149152f05c4facf235416. 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/QZ5AB2034270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa559fef5d1aacfeee71fe884900d207b70f04633868302d3fa93cdfebe7eca26. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZ5AB2034271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0abec427b7ec37443e34ed14b33d06eb219f00903386979aa0d35307ab8dd4. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZ5AB2034272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c89d1f98291ad01ea3ad1aa19b81a777e8917d213be5c516237138ddcbe2f5b. 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/QZ5AB2034273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0712b2ead5c23131879632d140e8f25d307b7ef27f7c0b6ece792b187480d9c. 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/QZ5AB2034274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b4c6f50b0bfc388561950cbb8030e671c240b2ecc74412818910748a15d97d. 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/QZ5AB2034275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf61a10143cdcb87e0e48cd00d3f3617372534cea5b627f5290f53526d592a96. 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/QZ5AB2034276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb361539d6953a95feff78b9dabc4e1e0eb1cdef2391df53fb18afc0be94c04. 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/QZ5AB2034277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe512872136c11e9179fc2931f0b985a4dab21c28e9cad6e2be40ff373619eddd. 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/QZ5AB2034278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51438e8ef8f6fa9955bd4932a6ef31e99c7acf8f41171f5de8f50eb6aa04a84. 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/QZ5AB2034279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f9aeecaaff280d0ec29c31373ef70c0ae870f6e531ace7e96e0aa2f42fe268. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZ5AB2034280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53de09728e0698e904aea50b2943dd71399fabc2f23599ad25f7a274e4ef68a6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZNJY2287889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a8b0652442ca755bd0eb6e224fda7e0c947565d1d10fcc4e4f931379dc1403. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZNJY2287904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4867edf38a289f2803a760a641a87698064a03c0469483759c31d68ec4064d. 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/QZGLS2401346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5253c536053c1370f98c18f7770576e84e54a37d3a6ef951efb15e6a478ebb9. 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/QZ5AB2468666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72e7cc09086d405fe463459324ff4e10383825e4739beb4fc2b50837ae5be01. 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/BR4EE1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78db3cf6313a461fc708fe205123999c1cf2798edf5ad48df867886af420ace. 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/BR4EE1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378321f9ca0389057ed1104ac945b56adca5ef852ebb97598df82bd838ebbc17. 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/BR4EE1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8146c017e2a0bb8041ade6ea6b3bde69003ce7b9e2db4d02b7b500a5194711. 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/BR4EE1800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaafcefe64063ac60862dd0fbc50c7f685e77a2f0cb78c07866ac143642f18cf. 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/BR4EE1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889da656bb3e78689954f4ca8ec2ae29d33e9efc75ef400c63ad6bd9ce593fcd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BR4EE1800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928d38da6ba6827e89ce605badf888d8e62c5167ad9f0e90a152c97e31680e57. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZW9M2473926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0202ec82e9fbdcd77b52292e87ed9a8caf3a5beceafb7efe4d6f9ed39bc0ef28. 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/GXF9Q2442177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f370977bfcdda007e212224c0f56cb61e5054124ba6aaadc649ce1cf163aaa. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GXF9Q2442178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7605040fcf40408aeb9c0f5d5a305af9afe125ee670b526655b5729289a12a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BC6M22414704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda11b1105ea1cb05fb9ca36ad19d969684ef287e7948408dfa9cf6b132819aea. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GXF9Q2442179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4b649fcdf8a8674face900cb78eae36d29de2be06c7f1d45d231a7e4c77978. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZNJX2444787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e6e587bd1b1043eaa3e9548c491867fdefa7af4ea8b83d4e53c422e5124ec3. 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/GXF9Q2442181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b396e139dc482e0e5a1a46b5ac4d82801aa51c29581c0da7a2cbed9825789f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GXF9Q2442182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f07f5ba7d9339d1a40c7c21a2451740d78217cc3487a29432757a9292d09dc. 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/GXF9Q2442183.