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 0xbad377070688bb2efe6721e0a72fa7baaf07d75ce886233157035fc699c601d1. 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/4d2935d1-b603-4fc1-9815-58f229cc4566.json and https://artists.proofprofile.net/proofs/artist/4d2935d1-b603-4fc1-9815-58f229cc4566.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 0x388ebec1f368c3693e50aada32d9c4c3432d00e859238f302007dffcd1de086b. 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/QZDA82105250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fbbba8c6919498b3e6de4b40b8ac89e8efa4cdcad4fe58bca364a5069efe02. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6H2172985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f88fcdf235a684a687a0df6456cb58617665deef86ec8dc4158bbd25e53158. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWV2318994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b957fe2d5dbf1b4421f77b0c079b4df9ac125057c452473c2b92e40a99152c9. 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/QZNWV2318995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3023a083e55941fa005296f14b8acefb0003ab003f961a6517ee1b6651fc2530. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB32315551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcba7b0b47bd07462c8387495155b2416402f8038574fd0f45e287b2a175d6b. 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/QZTB32315553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d67566c8e1b5059743e868476bb4f3caea539e498886d17d3ac0bb422c349ca. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB32315557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc25ca1f5434ba5fd66334f0063b348404352b6dad44700b77af23465ef71791. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:09Z), 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/QZWFM2334074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa202b4e8d93c0ed5b70e93c1861a4918ba536c71e89c861ea392c0a8ab53ce. 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/QZHN72433477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfc66042d7ca8cffc0bd8e59b3ad933182db4e18e4b937cf5bf5509e07caba6. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:26Z), 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/QZHN72433478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0fc7818626067cff5e7e1224562cfc36cd0d3491ad930460d03cf2196c38f1. 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/QZHN72433479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61e8c5fdeb1085ae09077d2eb7437278e59745e77af1c0bfc782e07e4c746e0. 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/QZK6J2459215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ef85dcdce8aff31213edc9e3f4c1077a863c6774b1339defb6de83961640f0. 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/QZK6J2459216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce262dfb867ce7aea6122991c43c8f9acd33033f2c6cfb6e49d5683829c8697. 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/QZK6J2459217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33dc54ea0ddb59d60c96fcdaceecb20e806f00c91d292d57725e978078e0132. 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/QZK6J2459218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfabf8d45d653c20e7987e59a0b756cbb36226fe9924a7b361faef8ae17ce790. 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/QT3FA2534979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc37ad561ae438c83c13712527be5129be40be6bb9f08d6e2469da410b2ddd99. 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/QZZ7K2450362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1497f67b443d3114ec4726ec95c67b91e974e216acb36f5c40b1b625b7df2aec. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:19:26Z), 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/QZTBE2533170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60d3553a5b5243f1d1bd07e010ebc0053eafe34a8efe4279db6b71ec2693caf. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFE2587242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f02c3cd59d6415fb30d0252539174e582615236598ce2ce4e9bc2e50350d111. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFE2587243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c09143455e77016e4a640ce2365f52541cc0a1de85d333bd17b4e13593456e. 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/QZZ7K2528307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbe460c69949b75a8f3c2bec0cb7313a7b4efc5733d5998cb3f8120184d4583. 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/QZZ7R2515236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258118fd9472d8618089232d9a2b73070ba6747b3d08f68105e643e121242e00. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNC2141808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca211fc6dba3d30a6921b49c0b17e3d2abfe255a405dc70602d0628cba9f3dd. 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/QZHN72225867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa3d8f4e7681a0374d72b8fa248f1a7a7162ecb2103a66a1324de0f392ecbc1. 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/QZHN72225874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cad20a8db71bfb788ae9ba806d9f40b1dd6d7b15bfcdf39ca59df279c1f2fd3. 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/QZHN72223876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d009824c41766ce72e8f53d13b7087668e57ead6334de7ec8cf7a9b78c343d. 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/QZHN72223880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e7ee09f4ecfe8a4afe408f980592e6e865d09a0c5f78a12562c826404a2919. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN72223885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c1bbe48ac217a6a58b5fafcd14f52317c99bbe876b919471881846071abc1f. 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/QZHN72223886.