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 0x34acbbe604bee9acce15cb0d10aa8fa78f339a6350e91844d05bd245a27c7113. 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/b906eef6-3b4a-42f9-b25d-ba0e0079bffd.json and https://artists.proofprofile.net/proofs/artist/b906eef6-3b4a-42f9-b25d-ba0e0079bffd.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 0xe70c08853bdf798b6eefcbefd66df4c790d5b865f9a1482f1f21b3a2f94d5965. 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/QMBZ91938240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d333235aa7f9ec178eccae74c9c82c681f804d13ca38415697b1e42f2eaac2. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QM4TW2006055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d333235aa7f9ec178eccae74c9c82c681f804d13ca38415697b1e42f2eaac2. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QM4TW2006055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de8ef9ed24036e748d7d2e0c9d69835009c034686ba765ea1a4f69bac99ac9. 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/QM6MZ2087517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb928378586fdb8e1f64b5609895e0b639b4e405d9fcf8271f445941061c4526. 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/QM6P42081590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb928378586fdb8e1f64b5609895e0b639b4e405d9fcf8271f445941061c4526. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QM6P42081590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e15777b36b6b275ec4c665e71cf5bf501141f0ae5e457ce3d6d94b540bdeb62. 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/QM7282073089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3caab32ad02784f3ae651b5303248c583fad77f9c147808e236ba2990fceb2. 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/GBRKQ2396597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d02c3e76e27c466b0c2f0bc351b12ad7220991530590f59168aade47de867d. 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/QMFME2019063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d02c3e76e27c466b0c2f0bc351b12ad7220991530590f59168aade47de867d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMFME2019063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f27428c1c85abd4800b30909185b99c7ff6af8c40007007ec53e8785e45c080. 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/PYC842201413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60d0ea3ad9d59e98c8f1fd2f75a64fdad5eb02516682b9555f87968369cf123. 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/GBRKQ2388398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5798d92071e4651a7b75799bdc648d627cea99f625b377bae7d9e6480986b8a. 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/GBRKQ2388431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8bccf6e285cb430714ce79aa78ee3fd1e5fa4fdf0c9992c45b43bb9ce0a976. 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/GBRKQ2388450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee03fa3d8153ca757d5df3125abe8092a6f9b38a03446971a568503fbc2409e. 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/PYC842201350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb0b2f35b82c7fdb2c8860c41cf3c61dc82ed0f13820358ccf1ea3fd72b6496. 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/GBRKQ2388479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509c9b8930e53df56adae7cfa88f24e1e465d34fb9f805f416276e7a23569daf. 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/GBRKQ2388489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59703dc51e88a6cabb90fe6d9f915cfdde600ad9028a3ea6121df7ed745c534f. 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/GBRKQ2388521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380c1119e7cbd1a04562dd23326443696cb016ddea6d6d16e56380ea8466c1f6. 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/QM4TW2167717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5249344b51b23fb52373da88e52a4e55eb673b949d2fdcb45b099eb4eae6ee77. 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/QM4TX2191306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4b3d249f6e99010bab66dee8c16113cffc122233b1e816fef4bbda0566dd21. 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/QM6P42195187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa680f0be2f0018dcea54728355b1b53d59e7aa4c8122ea7163867288ee97f1. 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/QMDA62112342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db5ee907c9614e3ce3970ded93a2f584139e8d8f033f2265fb9aeb7744fa413. 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/QMDA72195467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754629caeb2dc1e70ab89c5baece20efe10c3c1f2c427ced560b856f4684542d. 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/QM4TW2293538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0effd916c9e911e2816bdf378281a1c4a5b35a6181081957bd1aebd31699511a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZDA62240213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647af06bae0243a96b2d09dbc1ae2cd590cf30deb792274278f14cd9cb88a045. 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/QM4TX2215220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68970fa3ba8f74413b2f611c4f43ff731f8bc641ccad3c532fdc2a20a00737a1. 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/QM6MZ2274287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f27428c1c85abd4800b30909185b99c7ff6af8c40007007ec53e8785e45c080. 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/PYC842201413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60d0ea3ad9d59e98c8f1fd2f75a64fdad5eb02516682b9555f87968369cf123. 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/GBRKQ2388398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5798d92071e4651a7b75799bdc648d627cea99f625b377bae7d9e6480986b8a. 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/GBRKQ2388431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8bccf6e285cb430714ce79aa78ee3fd1e5fa4fdf0c9992c45b43bb9ce0a976. 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/GBRKQ2388450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee03fa3d8153ca757d5df3125abe8092a6f9b38a03446971a568503fbc2409e. 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/PYC842201350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb0b2f35b82c7fdb2c8860c41cf3c61dc82ed0f13820358ccf1ea3fd72b6496. 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/GBRKQ2388479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509c9b8930e53df56adae7cfa88f24e1e465d34fb9f805f416276e7a23569daf. 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/GBRKQ2388489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59703dc51e88a6cabb90fe6d9f915cfdde600ad9028a3ea6121df7ed745c534f. 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/GBRKQ2388521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe83d9046c5d9a32e4807219ab27a66b589091c0b0ba22b2749e5fcb062d4226. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZES92296265.