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 0xabb14486f23a37dc422b5b741d3b9fbc68dbfdd09b1444097f6779d95ce00263. Chain 2 (Bitcoin): anchored in block 953924 (2026-06-16T09:52:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cb0fd01-7de3-4f63-b2a3-fdca586df7cf.json and https://artists.proofprofile.net/proofs/artist/1cb0fd01-7de3-4f63-b2a3-fdca586df7cf.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 0xfd53f43f8bc1db3887e88256043d9cce92946dead3097349ec498787a649858e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUVC01507411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728b533c3592f1e31d5ca90a1b8afaca8436e52370a289fa4a36dc4fe9431a9a. 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/USDM31400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bd862138124069a6d75bda1b326e49a39fe90a419443765be676c6d00e037f. 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/NLF711401893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa63a2990aec5d45789318c6de977a07b593a77f70b30f2ff244e9d5bcf19b1a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLF711311100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1f0589d4ed1ae8a24d1e5193c0a19c6977d0234d867b534db6574c523ff57a. 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/NLF711203439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4f284e7a962a4cd5ac741c9dd10c7cd9bbd6978cf7205fb0738a32f3b81a94. 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/NLF711307814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2154e43855f2c056c1550a0c62c0e390743058d29adad04a63e134fb17aceafa. 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/NLF711310200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6897ca354f9dad18b0d16c25bf5dab58845b569c85b084bfd29cdcfb0439274. 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/NLF711400697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1594497eaf1a686cece4edae99587dfdfe6d92e1c73912f8a24d8a237a1fe6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLF711401901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce0f749f066b7c22417345a5af266dde3bd5ece2721060eb2cb33707abd5f0a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLF711401905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcebcf0d2b49a6b9c0acc6665b786fb55b02c52aa0a65d246e46c21deba78227. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLF711401897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0655a1951594be364d8ab173a240b0cdf408f5e072b5f230c227e65c961c4c. 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/NLF711400985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25d95488974d492406ad52ffc5b1f56da188c3aef5976cd21889c29c33e6921. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLF711400987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e121e0c2e8178abf8a85f5545edf5fff6556168ae9b5ddca920f3d08b7de18. 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/NLF711401924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647ee5c262631710e2311943a898a27a3b2e968198f86007212ad00e8947fe30. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLF711401634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65992a61bb52258300338e709f9a6d48f66fd36d4729571253aa05ce620ab7e7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLF711402017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7f3db443bef9cb480bef96757797b2a34a27fbbf6691d18b3251ac3600335b. 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/NLS241400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7663337dfe01ba0313468ba91981bcd4a496efbe3e6223c333491bc239ca8d2. 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/GB2CT0900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafdd8b256a56669fe3c7786980330c6c7454464d90036aa23110c0527fe894d. 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/CH3131340406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b51ffb44ecc4f8bbbd43827d6e1a1710459747942cd61783f01a016c92a3f1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLF711401871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5e0cf28079cebf859949766dc47bb68faa03ed2f163e4845e9ccb92c8a1040. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLS241400365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a187f096892102511eb43402f6b39aed12e258b9d9a03f8f3d52d89531a5e6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLS241400368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064baef0146591519e0affa0840b0e02bbdcc969acf4bc443ea424680974704c. 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/NLS241500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727eadca9f221843755395f019624ad638f045e4cf0e691291ec2df5eb35fe67. 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/GBKQU1317558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605d37725e2bddaccdd596b038b20ffdc4b31d2086148f671256c6f6b54586ec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLF711401957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ff63189537b6211d79aa0cffacbb9dba6714d3b2be6915c285d543b82769f7. 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/NLS241400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d67f908cbf42be14980dcb4560247ea5f3bdd99a58ed771854a82d75b8f9d7f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CA6D21000300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c308039d2f1f9430ad4888baeeae59986b0f03ae8b8262201dcef4a9489e3ee. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLF711400976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5328573340cf4767c62484fdd98711918ed60362bd6317ac3542c64593383cae. 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/NLF711403608.
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