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 0x2f5e08bdd7967dc442a9767e61d8a5b4aa5535aedfdbafd1a7115223748dbc4c. 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/ff299c11-98c6-449c-b5ee-895bb3dd27f0.json and https://artists.proofprofile.net/proofs/artist/ff299c11-98c6-449c-b5ee-895bb3dd27f0.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 0x0124f0af222317c9a89794159e281bc44f1aad347e16340e4caabe7135f2f7d5. 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/QZNWZ2429097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fbb0cc336d0c1c4b87c6dea9e28ce7ade5a280ce4355b358ef39d454fa40c2. 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/QZNWZ2429098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493b500d70676456cd0edc8abbc9a04878f3c4c95ecffe23d76a28208fabe928. 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/QZTBD2337440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24de3c349ffdf9c51a22e0014b04163b5560dc51e68eef4385c25f4cba0c836b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES72335412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1798562de0a36c19b41af87f2b7345c2b7b233ac70ec4dd474d69a475b0d708. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES82149489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fefd2fb341659ad7494ccfa23ca5078baffd22216b90f05553fd1fa1d21834. 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/QZFYY2188842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe445935da49fb045d8c0bf38c78c822848d53a153a1bdd93e51faa25bec9a29c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN52406468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7516409305d1a73a53cf494d29860a6c916f7be8576fb3d6357f3b91c8d7c248. 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/QZHN52406469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3154a9f17575f7b255af70760638f58d4634946d0b6917f757d5da49d46e772. 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/QZHN52406471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321f6a7a7c44352911d20798bffe358049dfa43d04074a1e4d5949328e6fc685. 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/QZHN52406472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9197ff4341984be86e9471d7c5f72ebadd6f7647a26ff51d586bd4d60891971c. 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/QZHN52406473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044a25360c6df431d64ae8875ccf9d00e58c9bc386efa160537b069fc40c81a1. 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/QZHN52406474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f7c51bfb5a4aaaa71296dc17f969e11c832f0a5da15dbfeb9b68e777958b5d. 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/QZHN52406476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273033ec2b286bff467d1b6ce4580e46411c145065a3cc66659f349e1f5ca955. 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/QZHN52406478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54d7d8466ab6b594b4914b389502c733485a236104747eaa55a800174c0bd2d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6M2261855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48d38f843a0a0be858f3839f0341c4018762b8ba9bc673d98092e30fe3f39d7. 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/QZK6M2261856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c16f2a7ec47ed64a2a52eb9bac265e5753d665a9188e94ac24261b9b672d4f4. 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/QZFYZ2064321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4588c6fb892d41c11bd821f73e7994909e9ca07ea11ff128755b41859a30e0. 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/QZK6M2261857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bafd455610c2fe51c3aac4eb7cab091cc31ec25dc520a87a87fca184eca4b9. 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/QZK6M2261859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359224d972a144c3eec60db7470ffdb9f1ed8943a66e49118c4076c2962107c2. 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/QZK6M2261860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c93b44cb6cda0b8f0342ab6ed74d70b9cb3823352de509193c9d1bc4d57f345. 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/QZK6M2261861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552d9accc01ed08a21d408d88a5f60afa5a4153af1f54080342ab2c0556e7285. 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/QZK6M2261862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fefd2fb341659ad7494ccfa23ca5078baffd22216b90f05553fd1fa1d21834. 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/QZFYY2188842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312219539bbb4954fa4809008129aed8fc2d46f54b0574049b415762b85265a1. 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/QZTBA2473238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870e4d61b4553c11302d1cb3dc10700659a8e31903b07ee890a5628934827250. 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/QZMEN2329856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f653616daf150e000934917acd217a584a0e579ed2af56c68b3ff850f6318a. 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/USPS12100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a283d6bc4718ab31376db4c7a52a7b441ee66f86235735b8773bbc73520b22b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:29:42Z), 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/QZES61917591.
Blame It On The Boogie (The Voice Performance)
Blame It On The Boogie - The Voice Performance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f68be3485133cbe248bc20bf4746f6cf9cf16eff4e39266d138b3eb4eae888a. 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/USUM71712377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4fe30e4559cba067fd8c5cdd4aeb9c10d627546a7d818fa9cfb7c04b899909. 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/QZDA41832020.
When We Were Young (The Voice Performance)
When We Were Young - The Voice Performance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad68e8963dc45b17ca3a65e6c1b27c961ebc455e658a12c4a6810ba336900e08. 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/USUM71712790.
I Wish It Would Rain (The Voice Performance)
I Wish It Would Rain - The Voice Performance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e01a4a2d15de642165d0af31d5f3fadc65ffe6aa346966e8c8a55baf6db70f7. 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/USUM71712127.
Versace On The Floor (The Voice Performance)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107ef35daa69e4d44c7e50cbacab1709af72b529b5562e94f424d6eda6edb175. 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/QZWFQ2322028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dc99b2deaabaa2c6db37b154e8bccafe8bcbe8db250e345e5425ee8981cad2. 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/QZWFQ2322029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21c75e26ce3d3f00ee1920ebf2218fa64fe13ef05532f58711f639093641033. 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/QZWFQ2322031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f514c42f0181a808aa346dda4bc924a81014ae81d7cae399925dbc234e30756. 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/QZWFQ2322032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b800650d111e4a1d485839c712f4bdd097a0c1b3d5634b42a7b88fa1e44f2c7. 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/QZKEU2000004.