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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cacc92d0d66812edb74bc3d96c7503f98bc00b6e171a47fa268925627771c6. 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/b49a9883-6c73-4d05-a310-7025dcf6d716.json and https://artists.proofprofile.net/proofs/artist/b49a9883-6c73-4d05-a310-7025dcf6d716.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf739bc1125cc07f0402188894192aa6cfb4281739715a9c574e12993008014b5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:35:06Z), 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/USHM91986250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc5b8ba4048f86da18ede0d43e09b053eff8a8c703e5c9ce893c6c5093e478a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USUYG1362291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a27603566eb0dd71fa8deaa5e8a6fe480819a9ba792986958fb78932d057288. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:04:08Z), 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/USUYG1394060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb8fcec047e4b576bd21ec774317ea464cf80b01205b9086eafc522f76a9b28. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USUYG1394061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf758d3297c41373d99f3a7861202bc9538aa62bf0411006161c851b8d26a094b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USUYG1394062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c507facad7a701fcd3c71451e7d4927feca37051dd04160d393872c61f4787e. 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/USUYG1391128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cb7b5a7d1c8d99898a5304d18a73628b0e450d5494695f84c1f940f969ee6e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USUYG1383380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b182df14d053f40f055e72351af0c77f2f32b2133830567223f71cbb9ac2db. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USUYG1410192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bd3b401b3cc1b0e178811b8f950de64370cbbf6a651d5b4acb993839cd1e42. 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/USUYG1416972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbf4d76b27074a64eb7238c90a1d4d9cbcb1466b25c634ebec4a0635caf60bf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:58:45Z), 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/USUYG1424372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8385cdab2638e3995865a6498881d7ab4f04120332c1df5a8e1f29a714569ad6. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:55:43Z), 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/USUYG1447825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29a5e767f76d372899ea65484e6248e21892f79be019fbf548b4c2c7b84be96. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USUYG1463824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bd672a025cc55ed8192050a019f98386cb5b310a345f6030526e5b56820d2c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USUYG1472189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd106261e0b24ae9f72254a049ac06e726b36faa77b1aada68bb5c4481cc38d51. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USUYG1492506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e6a9a9e34e9b80985701aab76e0766ae44e6a7d991b828583a56d0506e0590. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USUYG1497683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e6a9a9e34e9b80985701aab76e0766ae44e6a7d991b828583a56d0506e0590. 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/USUYG1497683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779259d53830c678db32b6666ac797e1b09d95e5531a5a319d3e97ad8191bce9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUYG1497685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67e0e56cb1a39de90ff26d345dd783f9d6f6d7e4580327e89a6971969e4d0bd. 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/USUYG1497686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ffa71b9bb096bd22063e55ec8a576caa0a9db3e3fdd1b44f43588136cc7478. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:08:24Z), 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/USUYG1508461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99e8aedeb0cb7891d43d481272967279bee1e361da34f0b25572d249e3bfc75. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:04:11Z), 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/USUYG1546886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406647dc17f1dde33e4ac0aca3bc0231a6469ddf0e54e2dde961619753c5ac5f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USUYG1560588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a53ad453186779a64313c4ece36e9913f0e31596491d8a002ebfa8542c4d01f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USUYG1578948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f29458775ad64a4385d119faa55671f8b58c95fe1d22298cc5fdfe49ff8c4c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USUYG1709520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5b6f90ea0f40578bd9329d1a532b816da9ed41fc7c7ae6edb9eeb3af28af23. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUYG1582212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406647dc17f1dde33e4ac0aca3bc0231a6469ddf0e54e2dde961619753c5ac5f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USUYG1560588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28cd515e8de342e7c1c1ea9abb17fefe3cf90535c159cf09e298d24779a3328. 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/USUYG1569560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99e8aedeb0cb7891d43d481272967279bee1e361da34f0b25572d249e3bfc75. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/USUYG1546886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0ccba7170f9090305f0cdf00e41b54296daeb9da4bc0fd1f915a19ec19f53b. 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/USUYG1582227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a53ad453186779a64313c4ece36e9913f0e31596491d8a002ebfa8542c4d01f. 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/USUYG1578948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf12e473a2d7779764c8137ab94a876770ad0a3d6e6af63da6691281d86e1ca. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USUYG1573393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3de958616fc39fd49082d18b8988131dd758814f716bfa15a31b37739e3aeb3. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:54:20Z), 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/USUYG1582228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389fc3444c786d68b084753ec1347488892231cf0adf304d6592d4be546eb68c. 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/USHM91866389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b0049f2731621e9a2e6d2f682b5898e4560af7c903f2b9efa473ba60981105. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM91866393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365784cf33a0ea96ef75a5c702dd0cc811fb053ae09b0a3075dbf1e16ec2c9d7. 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/USDY41620247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a8c5256ee3ed218c716f1ae8b08e27431a1551ad35204560775518ba7a7abc. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:23:28Z), 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/MXUM72201134.
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 0xfd0c2077ded4712f1e73468489988e65fe6cfeb3e4048fb5bbd0c36c6b7caeba. 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/USL4Q2007867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413305abfc04745f3cbc2879f5c110a5589f9f752492368b80eb7b3e6fb8b117. 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/USHM91866395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de8699b34dbd5ef874cb2997ece5bc3c2ea8702a8a6a45f6ec98308305121a7. 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/USDY41620253.