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 0xfa17cf952dda6945a8aa4ce38f829598bb35499a9876e5c4ba6c0b63f4ac5fad. 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/06ee1907-1342-4bf9-9c95-cfa2419efe67.json and https://artists.proofprofile.net/proofs/artist/06ee1907-1342-4bf9-9c95-cfa2419efe67.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 0xdc6fe2ff2e6b0bab6a0ecccae217b5cc509e2650ca6a15b878dfa6646ae0090b. 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/QZHN32164752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959c258412afe3103fad4ab49018819fb36be3b8b8c02571094ddfe151a36002. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN32164754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820c8ec8d2974489df79f7140b22f29a44e0a9ac158500ecfd63acc6bdc6fe41. 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/QZHN32164755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7d78050015d088ab542980ab9f95c8ab5a3c72ca25c092e8dd27ed256d1a8e. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZHN32164756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013a872235706007d22f7765f47a18cd0a63fc2f86343bff4bf24b76903e144a. 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/QZHN32164757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31c57642e5d5df429d9c00880613f02bed4f17fe13e7518b8e5df292a8b39d7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZHN32164759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33393ca1211dc4516504067c791ea8f71516f08b3dd0185ed1ad359c34e43d26. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTAW2232995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba9cae734d31f368162a527f568e518ef821ee467dd1338c4c376bd94fd8e70. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZFZ72394463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdf2b0bb679097ab5a26ad8d49b990e1e6d3c0d3180ce331b9895d9949d2078. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZFZ72394465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6374b01b8e02df98415b82a31610fecbd0f308ac6399e18a69f7e92c46bc230f. 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/QZFZ72394466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032a5a96f8bc90975b433f504772564e2f6332549f8cce87d3a0e200c9174606. 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/QZWFK2334460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b02cb6352148d43512812f56806306c7a1f21ce708877f3d5d2dba5cf96d09. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFK2334461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eea45f3d33c6f5850c66de3f90789ba173d017d9ebb41f312f861da8d6e5fc. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZWFK2334462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d1e6460741487756561592b4b4b3d324f4c1b97a1bf3dc1996190fc75f3d8b. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZWFK2334471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b2099875313d2c5e0cbd5eb0ec136a59781cced6cb6463afa11b1f1ec85119. 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/QZDA42466343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d24c24de66d03138a4eeb91d6abc3a8aa46bd259fc6114714fa7eb2a95bdad1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZDA42466344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ff853249124691e52d7e25786c7bf2b2aa43fa65d5d3d122abe68ae51d9121. 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/QZDA42466345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bab1ae9acd57d392be8ed229c2e146bf9b874b8d3a201fc17a6663c6c9d2da. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZDA42466347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf369feef210412709d210345361a45e7b56403f9f18863caf25509618842546a. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZDA42466355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13304c5f0eda0ab4ef9b7fb92bc53b273f5b8f6e6304a41a7979a03d8fdfaa4a. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZZ792407466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27a0902a7093004df0a0a2a2720d9a00766e56cc244c1daf671a388b8bebe6a. 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/QZZ792407467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca2ca4705143c2a5101b0a742e387a482ca2fdbbdd200a56b422b2130730a45. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZZ792407468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0d3ad02b50dfe648866a57ba38911daf999e583580bc970a7d1e5a3aeadc95. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZZ792407469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc0af396cdcc59a4f2ae3a1f84e41d8e12bc5301ec7f1236ecd95d19499a353. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZZ792407470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8039350699e9b84f304e29d40ba6d145044f959eae1094588f3e002ea35357. 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/QZZ792407471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514384771203697180a45dc592712ca86f4d571a5f88f9a04c8e6ff21b9def05. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZZ792407472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3aff8d45f3b675ab8351a5dd04ea9cb2987ce736067c8ef360536906c99f59. 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/QZZ792407473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fc729c1566c0a5f1a4740024b63d8f3f83b9868bbbb2e6c116c4281562d280. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZZ792407474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a2989e3190901fd56dc0f59045aa229e408fd4d3103d5f5706870f521042f6. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZZ792407475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b26ce2d03ade9eef7d812423c1e0f724b7cf5e65a33b1b52fddef2f4ad9891. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZZ792407476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942e4b8a404328dd54a9f024623aea45e3d6078bc6540dfe343aeb16846cf247. 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/QZZ792407477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5224dd8f9aea58229a3411ef3ca6a980a11463cc9d6bc84548fb2a3e8b7685c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZZ792407478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3e0da9e009cabfe6d85d402e32706a8e98c729535273f441674d8933070ed9. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZZ792407479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacf2d14ae99115b28e5756b20983be03ef30bc530dc21927998b544283f51d5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZZ792407480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2706bc2dfd4493a9e409a18a59881253f6ddfb8eabd5e0bb063b390f1962e980. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ792407485.