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 0xe40150ab58ccd23732d78ab2aeed0dd1cc1959ba4981bbb2c90d333acd0e9beb. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b649fc92-8b47-4813-bf78-0d4bcba8c974.json and https://artists.proofprofile.net/proofs/artist/b649fc92-8b47-4813-bf78-0d4bcba8c974.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 0x121c5885bde510dddbbc61a2a1830392f21b933eaf18d69e94dd8393949dfa90. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:25:07Z), 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/USN1R2360010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6d85ccd065c19ded3b4c2eb8f94ddc91404b95aecff413ba5cf9628894fb28. 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/US4EW0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a9067a39f10a992a2ac45b7a185b01329d0f960ae3bb91f227d150f8b93098. 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/USN1R1906011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923ea1f9d817e503cf01ed81d64a0e0a921649cddf4b575f0d06ddbc7165f021. 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/USUG12400621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a8ae48712eb92a6dc4d6ff2a970e8d8e1de73ade18fae9e6ca46c8aac56268. 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/USUM71016147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2df8af0482c1f6fff8449eafd4631dcf225a9ec9dd9b8e892b58f83ed43348. 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/USN1R1906031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd80706566ba0692b142a69e166eab8162c14b9ea87834491e22f186580df6a. 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/USUG12307195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6476280e4091067c84e41ac1888b03511ffb1c2d2a12c0e10b703ffddccba135. 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/QZHN82267965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d10788cb6a0a82ea19f4b28f0985942e21617e9ee295f2e4b3a2504034ef843. 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/USAB02304799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff697493449df1bc1e639ebabf46f05580a75c42273e39e5f9f7851442d35686. 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/USN1R2021002.
Nick Jr. Mix It Up! Vol. 10: Hip Hop Playground (The Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e1d84a015057317931868072cc52ba3fa968531d1497121f5d699cee938207. 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/USN1R2413001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65487092af3df7d3f4d7e37eae0edb30cf77423ea06cfbba2a12696d1c1b3aa. 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/USN1R2413002.
What Do Dinosaurs Do In The Morning - Hip Hop Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa71aa7c832c18e22b0b83c5ae1e8a7d71ff633680f19a1ed5f1429f3e4e669. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USN1R2413009.
Blue’s Clues & You - Theme Song / Hip Hop Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a2e5f968512082e30c07b507435954512e86d5b35d83bf081f30a98dc6acc8. 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/USN1R2413014.
Nick Jr. Mix It Up! Vol. 12: Ultimate Party Playlist (The Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0174bdd83d9c503759efab5229ae72ce54dcef7db4c0743abf5cc905926687fc. 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/USN1R2419011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110be3c30d3abd0c2f64a396bb14f1ed711212233ccd8ec52bda0c001ebd0598. 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/USN1R2424011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2543e9b081b8250a369d025bb5ce9b0745260b92f1e6049d9155f0e8532e4bf2. 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/USN1R2309004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3fc5a3bff7998489c1938be820d315e6d204d03da2d4504bca2b5277f009a9. 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/USN1R2431023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaa642f3be6d17decf8bf630f5f565923d7a7cd705c4485bec5878f05d077d2. 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/CAGUG1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e9da1b781f57bf64b2f67425275349ed539bb5b58c673c70704087bb9fa834. 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/USN1R1909034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd629f04169f5b2ffc89e9dd3ae2219e5f734ac5a1b1d23288351007df5003725. 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/USN1R2021008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e273dff2948f33995dbf11e574b30ed52b449778c5bcd2324bf958878158c7f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USN1R2439007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722f9cdca6627ffd27aab4171172d6b09a55e1a78571ae0caacb33a57d703c4a. 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/USN1R2405026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ff06ccd6e52df6f6a379a6c6ba87cedc1364c85f5faf2a046614e4eb86709a. 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/USN1R2110007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eedb45cdde01a2a4f4f0c9446342e708a9561807476c444bdf2d2b5929dc29b. 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/CAGUG1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f0142c02c3268bc5e76482fb9265c5358a73b1121daa3c848b4a964ee5713c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USN1R2419002.
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