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 0xe4c4bea3334921647309a4cdca6c624b0aeb338130044ef7b99718fc83ee3683. 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/2ba18194-5a80-4d62-b9d1-f0241d5780ee.json and https://artists.proofprofile.net/proofs/artist/2ba18194-5a80-4d62-b9d1-f0241d5780ee.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 0xbdb4865c3c4f01976027af6121a187662a5ceaa6e666f73c208616e31fc55b54. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZK6P2165233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859942d64ab631a8a5768c7336b8df6689f3a8e0576da685d0d356baec95d533. 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/QZES72235935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47da1e4781e4ad2e3895013f9d9515f4d2079c21f8ad5394bcc6ce5bbd1dd98b. 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/QZMEN2370837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95319dd5d042830f30e6cb40cb8673b439897749f3f0a64f26d2550f79f7236. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZWFN2327352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea0efcf92acf67b41e297f19c984b7169d65beb00dbe6facebeb1cac9579366. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZFYX2493675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feae46f7e1c9500aa2481d14dd180fcbf32856131846e46ee766d1ffdcea106. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZFYX2493676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf2f6ff15079c6671b31b58d48169e7b853520b35931331563ff746b6244948. 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/QZFYX2493679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb814d4fb78c7f3035a17969d0ef002b38fa71fea5911f1f5fc5d135536e1ad1. 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/QZRP42471236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48137341f2eda23528fc487651b0b5f5811714569624e2e97725dda516ca3a6. 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/QZRP42471237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3b8a32b5ee83a55ec6dc89fef4941568df92841a47da3a878c916938c48627. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZTBA2412212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb803fc777aed3bacda33f96bd9a35b675080d8664f7e2f2393bed8caa7196231. 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/QZWFX2471311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ab87850de0fef3277bcf5a6fb6b5f0996dae5e230daf24f9d0efeda0b6f967. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA82540216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b936c60269817c68e3aa712fa428af2a8736b8dfa9a321d6f4949d089ec6ad. 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/QZHN32549144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0627dcee6670ac6bfe45d6b098ecc4116a7d630d9c0827f7cefe1fdbaa232b95. 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/QZNWZ2523028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5a553b9b2c424ddfd0663444ac1fcff078dff4285f26370555a2f0ea5250d1. 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/QZK6N2573052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda19d9d5a2b7903e97c8787311e346808761e961b28203e0099ad49dfb945379. 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/QZTAU2509122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5a553b9b2c424ddfd0663444ac1fcff078dff4285f26370555a2f0ea5250d1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6N2573052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeafd220176d1513d62f21d8cc0d360820341449daaf757721dbc22db879b96. 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/QZTAU2509123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809d32740215fd2e34e8198b752e202bb237ba01c64ea1bea8cff130aee4ff76. 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/QZTAU2509124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0627dcee6670ac6bfe45d6b098ecc4116a7d630d9c0827f7cefe1fdbaa232b95. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWZ2523028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc5d6749b9ba7a680b8bd933d3de11f4264053b4fbe442d0f9fea147e8b357c. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZTAU2509125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480753fc84ce2a168814b132ed058a18229cbddaae94f64117a52bba5ae088fc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTAU2509126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2724f11f58748a2741ae50519b63ee5f383e995541ab582ab08715877603499b. 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/QZTAU2509127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3e67143c163e88564d330ba1391f8163c10e17f96f11b85b2211e92a1509bc. 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/QZTAU2509128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3b6f51247c483564b933f0aa3be08b9411504b319a9138664187a18a24272f. 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/QZWFL2575816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6f927c8067a3eaa70ad38c1e1092e07654ba37f3d8290c2fde37a2584533cd. 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/QZZ7U2572453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9101967902ac5dc4ad30fb43bff58e1c8feaab545bdd19564f4a3cd21d1f12cf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3F82527814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef462bfc1efd44c9e9d6a99f9a2a50fdc536494ec9b7344066abb7f012f248b. 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/QZFYY2327997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a88facf6c33583c3fe433dd769a368f22826ed5acc07ebef295510359ccadff. 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/QZFYZ2307277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf419137b028deced9f3f916ed8ff49c7c4c256ecf2be0bf5536bbb90a1fb5bf8. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/QZK6G2478556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e41da86d3291b7ee7e484cd3afd052716414917f1af4d9838d51303bd0a5673. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZPLR2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb00055ff82c137cc94e9ec625fa9af23bb5b5940c72b5bf6411cf809767879b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZK6L2459131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc062358bcb8c627dc80ac6be69547f6531238a94afbe250b216b7817136ce9ab. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTB82419657.