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 0x288fc6674c9ddcbb1f0c9efdd480e5b75eeb92d0a45e6662e885d05e6d202bae. 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/01f6abe9-34ae-4e89-bd83-7958753ea1c7.json and https://artists.proofprofile.net/proofs/artist/01f6abe9-34ae-4e89-bd83-7958753ea1c7.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 0xbee72c09ab5d96a2fb8d660b9760b164b31599eaa6d3a4a6a26c20bd5421a741. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAFQ2188299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67999a5b17cc08f8330877f614176d8f66745a58e7c8e049dd264998b3e22ec4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFQ2188434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ab279f186daa12708dc360c60504eec1ae793cb8f31bb3845cba1fcef9b759. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAFR2108093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe439795d3eb39a2a1aeced12c39d9252c20c08cc948fc96654f8b3e900d2e467. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFR2108096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe6571917bc9ec2c026c7e0cd76bae42b5c656da306e15ac5bfdb0c89e13399. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAFR2108100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c8f9e4aad4c19df4e6feaf2c6bcbf6acdc05d25802d01cfef72f9bcfcb45f6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFR2108102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eef66887c9db936359dd0078a76907b0d4b73ab5f123ffa60de5ac9d2b4ec5. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAFR2108237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84b1dfca3f75a0057094cafbfcb0921912f4d39883da6da81520485dbcdf163. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/TCAFR2108718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04031010e94ff4e2d869c52b7ea9fa9143a76ebb5716980ed7c6e4c418250bcd. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/TCAFR2108723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5eb21b0a31f3e0d74ebb92918967c139f07b16d768e7127323715dc91b7179. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFR2139808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcceeca84d4884f2fe2d2368606fce512a8d2312efc86c08b1e52239a1167a9. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/TCAFR2139824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1690ce5564a195e450e7ffe3ad0f76adc4fc435adb49c0f4ef44525a123e87ee. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAFR2139846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237a8adabe028a04bed8e2efc1144add05ff36e709c6da8eabb9f57b8b690eaf. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAFW2140002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32b5dff3c38030179d0480dcd91dd554f4d0eb8748fe74ae059b3b3fb9d23ed. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAFW2140023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e633b122bdd06e655ece301fefc6ca207ddd779b512df960a77f49efc2d691. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAFW2140028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc079e93de1f2dc09acf04e91efc9b48930e1ac6b61dec66cf039f3e8ec8e57b9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAFW2140152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53fe0bc12110a1d7480b2cd596c7cf9300957fc281e8c22c747f54b4c5230a8. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAGF2266623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f97b62e1bdaae3d4e422b524f8ad9f4cf46e024600c59ddacd5cb3273d2479. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAGF2266671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a3de036635bc50a330cb8d06d368290d516ba523c8b667c9b05ae874adfd4f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAGF2266674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbafc0942843e0393f30840dd0efe87a3ca33876dacd91259fcd46603b7f39c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAGF2266684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f74537aaf2395576af5d3b298c6ccedbf2fbd47f4e0dd16b11090d127a01e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAGR2201478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6fc0e25685682827544af337b0924f327b2239a7337ec9fedefd5f8517546c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAGR2201597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ca5857d574f607bbfb2507157b6fb62d50908d1a3082e49436e0a910797c7d. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCAGR2201616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fdfb463fbab448c568f9782f9a5009140927f149862e326da7a0e38931fcd0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGR2201652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6149244fe0f776e9d9c68b0dcacd0295b06823a09778734ec2036d3419af280e. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCAGR2201709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c5832cae2cba9618d4519c6a95c7e78d0a5dc9c93715924f119bb961eea055. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAGR2201834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4ae773778ef7f4931a01e7871c60105de91592b1d14f5d3962e918d2777b93. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAGR2201843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2207097e4d3428fbf3fef42386830dd083ebcf665d0b97477b9cc9e1335e1466. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/TCAGR2201851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d973ad71cff85acece2c594bf780588405218f1838028c4512b0ce493efd3d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGR2201879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e00eccd4aea9a13a56fb266e09a86aebc4249cd7106980d496f85dca792baf. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCAGR2201907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b68762f0ccfb9e58ad7bf85d6b9968ff8c37fdd73463a982fe9f3507fbb6878. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAGR2201918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6cef04b3cb0b81236e861783507d0377f269a0658aa3289342e5dfe198e78e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TCAGR2201957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ba52f63be4c7ca235e833e7af900d1bcf7287ea22a5c6c6b669e2bb79b2410. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/TCAHF2308797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9869a657f2356b6d945f8545cf5e5d99b76f469344b3a4843529367e635ba. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TCAHJ2333413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1a79c9e4e8f4967cfad5ffd6f095868d9ab532430631aeb61774f3dcb53f00. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAIM2453601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dbbc44407bedfb37598e851ae9fdec0a5798ad272000fc5f056c38c9fa3499. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAJP2510306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbe8bcc0e4195ea8b9d6866ad137f6b81b853f24d9f5454e0e56f002fee9042. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT65X2553036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7b2efb10677542ad6f3446515728be74f04962515e68fae610a16d0d3c0cc9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT6622503207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3da4e3299e5c5acb686339d3ffc4a13f7141151bff76677a059f51eed4ef52d. 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/QZW9M2314363.