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 0xec2f80b46c19f9aa0a818ac4524d165587ae4ea0bc88d53bb307cc99eff7cf22. 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/ef805b1b-8aff-4f21-a9b9-cbc451c82113.json and https://artists.proofprofile.net/proofs/artist/ef805b1b-8aff-4f21-a9b9-cbc451c82113.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 0x60ec31bdccc35953052e130a1316a3f319ac9862665aafbe5c18c3c637f5e814. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZES82497799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a07ef9b24065fbec71eb0865a2ce7a1bcd8d412b8c31c545f4167c2e68a60d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN42403128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a07ef9b24065fbec71eb0865a2ce7a1bcd8d412b8c31c545f4167c2e68a60d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZHN42403128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5098488638db65e5ebe320ed8bde5626e90fe2709d042a2ca2ec497f474e77cb. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZES82422155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5b5e808b790411b02c91bfac9bc7188aec8ebd8575fdf11cd6f041ef3ee5e0. 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/QZHNB2470107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce53c4a6e36c8b1cb4cf66545c78f42f6490847f5f9a7e7bc271cf7a1580e0a. 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/QZTBB2438207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb840dd81b2a73f6f5b0dad95f4900a6356f6e4e5762cd6a81ed9a00b7f08b3e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTB92478845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bc77d9462adef99260c9555f8c811a47942e640868c0fa7b3526b5751f11e2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBB2438208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3338861adc1e1b95608b1ac86f504a81a78b7dd156fab5e94d515b89ad24a1. 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/QZTBB2438209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a5c03b7214257e7f8b95c0f09f522b9291a9ffb39ed61909e9bbb28e35709d. 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/QZTBB2438210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c89717b5673fff81b1383011007eb060bca1af1e97eafeca52d01d1017c9d7. 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/QZTBB2438211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc200b7d3a3b5419ff080ef287edae0c71f60c1295069b3b4c487ebaf50df5883. 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/QZTBB2438213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1a9bb792825a3761a1687a2fbdd3d69b247ac56dba53b6d34a63d0c32a9ed7. 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/QZTBB2438214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2707841ab4a1a63535ff8714a35b3a26ed16c632ce68cd68136073a2ac53a4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFE2470333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf428adbfaaad8f22a2ab81fb8dd2cc1a78feb594b487cdecce295df3c457a30. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFE2470335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488d46dd234299dbabb3d912d19dc696659601b9a643a9f7edfa14d41b698497. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZWFE2470336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d84511b5d4c23bee22824900720ae6760372510a10a7dd459576e5de6fe0ff. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZWFE2470337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c08d6ff56e9f0cea41dbcb769e4e050c1eb62815a76a89e14e35412c5b831e6. 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/QZWFE2470338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2d2bcd81bb3a8bded1fe1bd7fc5f43b3dcdeee5fb9e09f159efb343230bb65. 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/QZWFE2470340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed0a8d0ac7d705036d156d5220db1a02ef94ea7d88864bcf1bf963f9b3a3722. 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/QZZ7K2455002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65d8495681613e5eefe28ea7bf1adcbd9d2be740b0dc8c4103e8d8f0eb65318. 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/QZZ772417043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bff54e034eb8a2abb04b0f59eb08aedfc3cf92200cfb7a71b4af074f85be4ce. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QT3F22437891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2017fec630d03fc0f548e56b956e23da27e50eca5c9ce9135d6bdff6fcea5d01. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT3F42401788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe386ebf261963194ce18ea5622dd728e297560899d75eb811b6e001137c3ae. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3F42401791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1637a06094d7d36945f011b133264976834de874df1ba0fb6568ca3d892e01. 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/QT3F42401792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cc715e26d4b650582537ab1a70d0d666fce4076693d51f431df0e211021390. 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/QT3F42401794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068729ff607f59cbe547a6a24e47d6f83185ac8c587230069cd12c2b212fa368. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3F42401796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419ea8f063e7db73af0c9f451201723210393f8a2475ed69b60f5d00a6661e6b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QT3F42401797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7c9d5afd53262c7cac064d3ef0b65f46015d9614fd44aad00b1a8544acc72c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QT3F42401798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17e54b0faa2668e73caa1350ad5eeb360e1d308e11517a86043bddd3fb69f03. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QT3F42401799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6553e3a7eeab9806dca7daf68ccc587d6da71c5120ac378b4829450c9d6bdef6. 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/QT3F42401800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c257853239392a408c7cb3a75f68b2c3b1ed49f0fe2577bbef535dcb969b1f8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3F42401801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567c2ca2e28aee865e6397fdada7cb181540f9239dcc13a2540bae516d9915cd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F42401802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadee516891352adfc89cb10b3ed9147ce29566f03edb7631e43b45b9ee8cb96c. 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/QT3F42401803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe229dbee444856f46e77455996e58e7e848e0846ab6d17f6f6e4544ce9c2d0f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QT3F42401804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4784a93c58f820e541822e6a6782dfc2648ce6402546501b46685f50bde2c019. 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/TCAJQ2554906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3261b0e1b0da497d530c1297d61504ad55f3505ddab07b58d7c771db195c57f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAJR2529850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b67a4e913a774f447fa919c3627978dc0aacc3305a46c351ce63ba17ef3e4f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJS2528422.