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 0x492adbc4a3048c25a3ea9e2ac6b0581439a8327ca43ba452b684a40c23a23c82. 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/cdb9a69c-8a59-4630-9f38-3c60de1eecf6.json and https://artists.proofprofile.net/proofs/artist/cdb9a69c-8a59-4630-9f38-3c60de1eecf6.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 0xaf59e5bb46a6e456101bb502dadbb4a553e6c367a7099cf089d2919502e111b9. 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/USCGH2179999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601e8c7099fa823f7e87ce77f428be97fe2ce64a5b81c71e53ecad2eee5e6d9c. 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/USCGH2180000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa66c76654c1670cd644e8e7bc13be00dbce28a4b2f4abd78074de20d7f81027. 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/USCGH2180001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c10ab7dc30a04e42b1bdc4818ca4d34cf2a9b1050ec657768028fa54a4e83d. 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/USCGH2180003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae61fb1e33e9b8b07cfe7792f4cf8c8e91165770d6767c38c9119da56300dc7. 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/USCGH2180004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3518fb3e106ff3199cd4a6c054071fae6477554c13378f868ee04229d35adac3. 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/USCGH2180007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812cb33442d8232f4d90737775b8bcc93dcdb122ea879bf42fcdfd3b9571f316. 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/USCGH2180009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c51da70269c3a3b44ff7995f50771650d9fe4ddbe46205a5343e86014d8a0f6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGH2179998.
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 0x96d19862a50640dc26d8652fa4de47f74be0be75d29db698d3af065b84bfabdf. 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/USCGH2180002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2f687745de22243afea0d77c8209fc714ab12860f9accd464175ff77eb617f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGH2180005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23c54d74148b1276819c9bd69de630688aabd20b27402aa68f000ec96f243e1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USCGH2180006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f65483c44c78b6d7a657f33ac14075e28e851e9807a20156e355df12de1b81f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USCGH2180008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c28e7536d18a3a7db8fb8b53f0b62d0d4ca6dabf261352ac9f3d9998be6f50. 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/USHM91999875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686e950c8b1ebe0feb72740d584a1628bf4b325c42ab3fee71805f5e1d954934. 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/USHM91999876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe082d7b53b33061fad8bf0fb379a4d8c2e8864fdd00db8f8eaf0ae5afab9a775. 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/USHM91999877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb336f5bfec8a7c0eb8be67114cf163d4e8ac23d240d2ef623f792785e6d7f627. 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/USHM91999878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e0445c1f4e0c8dbd0cf56f2e2e5f01dfffe8f2126f054d9357887f78535b62. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM91999879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76ec83da53ae56a360fee4080771532b406979eba495d19db32e227af2126ff. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:31:07Z), 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/USHM91999881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dcda6078c3c8bcfa980af2ab2e9dad0ab32adc12b0d5a96e81092b5a10f9a6. 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/USHM91999885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0ea1f49c6279a835f2a999025cb3011175066450306945afab9653681a3ea4. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USHM91999886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936f7a5902cd423cd6d1c64ada524d3688a7575b526caa3b2897b3eef4251077. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USHM91999882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee279231cf2eaaee45268d0e270418e36824ab6e8d18ba59c7f95e11cb59503d. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:30:27Z), 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/USHM91999883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd565f99d77c0abe491f81d332423f692e85b56839fe3e15d390356e44d96c2d8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USHM91999880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f11b21032fd9767d0723626f423ac9c10916629d9ae14fb22ca086d66da374. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USHM91999884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59193059f4a95701a72f4423de2b1cf977b181f416d77cbcea3e5d9bdc3adb0. 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/USDY42420781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc551f8cd7eb3b409cabca3474b3a47ae96e99c9a58a3b7f7c61817d72f49ca8c. 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/USDY42240022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ce83fbcb693c9f169ca428111b2f78a3fe059f8ced98cc6cfbafe37867ad9b. 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/USDY42151595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f71503408a8b7844fb5f23884bf1fd240e43ea9c1ae65ff4294bc139696a5a9. 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/USHM91958392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9e7fb7b6af4fa4cc11e09361b5bcf4e83e1f19c345f89eff16804b9e8a97b7. 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/USL4R1812548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf375844939a228e25a96d36af0e90e76254b9af1ecefcc40429feec9ac20330f. 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/USDY41787806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6e97e961f656f6411a88d298ad9cee7d35c9759b14a79bdaa9f1737798a6ae. 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/USDY41787807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d23d7a26adba0e95c0245b01c4a41712ff0847cffe82e4ca7e18fb0dc829e5. 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/USDY41787809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a5cec7168a5ca97212c894b81972237e7906a3e7817b82dc14a9c93ed7ba51. 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/USDY41787810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb41a33aab161103957671c10115c62b7e7cd8ecf02b70d80fa0b28a4334201. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/USDY41787808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80279d2b2008d75adcf7246a12838ef8d51f1ab1f099588b693c493c70a0b049. 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/USHM81681391.