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 0xe0cdb15f1680bb774ba72e24123e358d83c928d1fe34d4640785caa891526c5e. 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/ed9a2a9e-3a24-44ed-bbcc-30c5bdb3d326.json and https://artists.proofprofile.net/proofs/artist/ed9a2a9e-3a24-44ed-bbcc-30c5bdb3d326.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 0x73844aed30f9e31b50f6d3fcabd0a2a4ea4560f97966e5e6bdc81a1ce57946b6. 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/FR6V80989550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40603c01cac32516e477a94bd975490626199c66c7ed891cc476b7c2e96ad7f9. 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/FR6V80989551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2088df0827637e5912b37bcaa83b213cac43593ed419463aac788e1f6d30cb53. 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/FR6V80989552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04f8d95aa1bb8688b225cf53d159613089a52d3b38b9dcf853a9d81de2c0911. 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/FR6V80989553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4fb2755f3654b04fd7ce215b0b1ce2e0f600a7d6aef6b8c855e821a18c269f. 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/FR6V80989554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1e0bdb47c39d70e69934387728d1475e1651ef5890df865508b9632c7da9b2. 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/FR6V80989555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd1ac287b8e705e5b4ccc34523a6fd46aac0b5255d42983cf52ba5473eb443b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FR6V80989556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c284a13b27ff8986e05865264b36a50613fe8aa3a4b74569b968c36d410217. 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/FR6V80989557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62eff5e55e7b52a1f8ba8e84f8f4bc5104ca9dc03bfb6f9f6d6e917679c43c1. 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/FR6V80989558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371a70494eba08f2832d9bf92ae3c4a8566cb6d983f719fcfac657e693cbc05f. 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/FR6V80989559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412713004f56b705e41809020bde92bc4226ce70f5380e7583f7389e84b8a625. 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/FR6V80989560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6d81f0a69bf5b189852513cd654a428523fb869ed89fcb97c244bc560e466a. 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/FR6V80989561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f1152de5b6a736443074f9728abf1664bcbd44af05db919d44d949854435b6. 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/FR6V80989562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2986b98929d3ec8b65f228b248afa6c2243627cfe659d0dcd5b12ec0f295154b. 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/FR6V80989563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4988a402b33775602f9321e74c9f98e9da27df6c8a54e16e70fbe5f3a4d4618. 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/FRX451559700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e0440003df78577a19890dc7cb67c72cf7ec48ccebc23c769ef68056d19655. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/FRX451559701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9355a3e7612cfe47563797b5f8d1bca7a5239e097b8189ec02624897bea6c0da. 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/FRX451559702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e96768177d3cd120aa1c301f2db61aeebe5ada92061be5d21f883b6d8cc7178. 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/FRX451559703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd231f2955f974022148983bc10abebcc5f88463c79be8d0280661f4267ca3f9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX451559704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33adb849bfad6ec05f68eac231b442def71fe9b8b72ad4534b833d34c0f27606. 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/FR96X1506870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4a3c3fa0436adc214770446b1191233878dd723569c4275000055e116c6db3. 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/FR96X1506871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90b9c811cfd30537c75fcc891b665981d897e81d99d73cbbd9705ad54f97fe8. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEBL61039463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea4caf3602a0815c2178ea99eb57e8934457f2cb016de30274f5eab98dd7401. 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/DEBL61039464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1ca5eebee9d81c5104c7d85de2e8f6780bdab912d66e73fc7f6cffb77e1b59. 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/DEBL61039465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136eb42f57c6885850c40f11b0f6c204e5aa9bc5436bc24b21e0cea1533243c0. 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/DEBL61039466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d08108e0c8ff0ae7145d9bc8a0f17dd5b706396b75fcb1713d33ecfb3d09c5. 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/DEBL61039467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec377570b7116ecc7a399e7436d64b792dfdf9079483ad7b1fff83a12bbcc30e. 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/DEBL61039468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf467850cf56bee967720a8451ad230657b2dfa161f06c12b28995da4d6b869b3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEBL61039469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2755e75b99b7b2892e3d45aab76e748d55a5ade185f2e3eb0aabdf8038eaf184. 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/DEBL61039470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d1b3c412c72845054566308ed83706ac2ae7d6a5801a54750b535f1939cdd8. 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/DEBL61039471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe864acdcbc9a2db0748f23b54d3f683879732fc94c0ac7b63f26fb01a75bef0c. 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/DEBL61039472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba40d96b124abd42edc68ac9cbd15752a38da76300005c402a057fc4f16371d7. 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/DEBL61039473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7f69a46d6b3ffeaca3908d249c3192c6417574992d69d22790c545520928d2. 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/DEBL61039474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178cfc38633e90a7611bfa1b9dd1fcd0ff8a14ed8932fc097acf62530f8b8cb3. 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/DEBL61039475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736788bd3a31a6d3575d71f77dc5cb7afbc24df26a60a9a8a5f076dc39390526. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEBL61039476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ae50ffa196c8e58a9de7f8c04aac8954d58f890c2f3283fd340c639271d4ba. 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/DEBL60943003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4871aa40a0dde723f4f2dcbee6dff1632c69c19870d8fbc6878aefd44f0ea7ad. 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/DEBL60943004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf540f9632c9cf1f4d4ddbbd0c9ab9ba771ad0ddcb62ec4d7e19932081f8e1dca. 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/DEBL60943001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb298e8fd53ab157ec29b0a0a87e41910a36ba492c5d27d58fafe61c09e43827. 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/DEBL60943007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a03e808cfc429f43811a68be5a134331838e8c83442b4a25fad0c428d05b26f. 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/DEBL60943002.