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 0x1a9be4da2531742f77ca0945a83c9922ab0982168f31b886f6b3fbdb200f5bf1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d760ace4-aa88-44fb-bc5e-ac253a284990.json and https://artists.proofprofile.net/proofs/artist/d760ace4-aa88-44fb-bc5e-ac253a284990.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 0xdeba80582a89ecc4ff00a1398d797d5cd3bfe6817b9b1eef5485f851681583bd. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZK6P2166175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8913bab543c65491fe4dc10bfbb605c64b5245d1a56bc180151bb7082a64d87. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6P2166177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15a4f910d02f6a590ed5e9ac96c98b649a7ab57aceafcd883d6e8dafeb61ef3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:46:23Z), 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/QZK6P2166179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d105a51ee481c85cd26e9a40684ed328021daf83fe02b34c46fb5e4ca5f13c6. 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/QZK6P2166180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aede7999a59b9d3231ac2d5cc606110e97b82682bb90f79f4ec055a9371dd45. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6P2166181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3969ca806224ab9380febbeffba564bb9f3370c052cc49578c2c9ee23ac129b6. 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/QZK6P2166182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c328394bc9612fcff4512eebc62f1ca0c29e3028c2c2cb6b93a24730cd7017. 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/QZK6P2166183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628ca492eb8ce63a9e3af269738de54c719c776fec1fa6927fc3a14ba1b24ccd. 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/QZTAT2173864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd425ff444c243a5b15763f3e1f2cf54564280e66aa4da4cc239ecda074804a3. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTAT2173865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974943eeb97dadfa76420ab59c66288502f49c08638cb232261f3159dc759b6b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:30Z), 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/QZTAT2173868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fed0d0cbb517bb9a556770fefc1131bf9adb0bce6211bebf080c3cc85b5c925. 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/QZTAT2173869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393375a67b584dcd2ad1d80d5a3c1f8704763bbbf04754ce1b1cd02b25b2ce54. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTAT2173870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c482dabd97b1224798986a4998cbf9632050d40aed9406789fdf196aae382b1. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:31:50Z), 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/QZTAT2173874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0e84df90324664b5d2f6262c04498f13bb3d5e1cdb7dab5e7dc90a3d849645. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:39:10Z), 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/QZTAT2173875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddf935dbcf4bf48d8f1ff64968bda95cdb84df0c82b8dbdeda9efef21833b24. 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/QZTAT2173876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7528537725a23e6efae501b36ebf408d98022cd3083b65a55faff0c4b7b605. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6J2301950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bda170d683709eb1e43b8f60b068b79062448315c3772c31e3f579561f918a4. 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/QZK6J2301952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b005a795ad00440823256a6825c08d3696140dd33ae72116519332dc220ee16. 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/QZK6J2301957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ceaf2f88963ea7240fe0fe0fa2595f0792c8034951c713658c313d5bd8ee05. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:31:25Z), 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/QZDA42537117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58903645fa3bc91c37143bad1f8e7538ff076cbadd66a9530075d7e3936a956a. 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/QZDA42537118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeb17c2110f70570352a17d671df8838fe286b80ca30d12cacfadbb649c0908. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZDA42537119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871f78afa3e2aaed5c558dfeb7fe04a6bc6a24508549e5e5bf4044b914670efc. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZDA42537120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3509228f73193302c71fcc76e826109fa695eec4c8c3e51fd07fb6fd81bcd7df. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:44:52Z), 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/QZDA42537122.