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 0x8a3b77d2145afaa9adc33e3e01c2ec13e22d0335a8cc3ee65d2ddd056351a6b1. 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/09775d84-6152-48be-90ff-8c9b4ba9020f.json and https://artists.proofprofile.net/proofs/artist/09775d84-6152-48be-90ff-8c9b4ba9020f.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 0x45af0ff4b6502d8862ab0e5cbf6b274383e0676a3171d0e548923b33cfbd6fe6. 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/USTB11500302.
9th Chamber Featuring La the Darkman, Baretta 9, Killa Sin, Street Life (feat. La the Darkman, Baretta 9, Killa Sin & Street Life)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9b6dd1512e42fcf0d7d532f51fbcb73f11fe12874e3b82b0d55a46852c1a97. 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/USLR59900232.
The O-Zone Files: Rare Demos and Unreleased Tracks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9fbdcc22d066c925a7ca7eb2b8b2e2e4f0a6b7a10d3625e36adc05c94cb07b. 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/QM6N21969320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95644abc387375e43e26184b5cfa88bbe60f5236ce527ec57b90676b363903bf. 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/QM6N21914664.
Wu-Tang Cream Team Line-Up (feat. Raekwon, Inspectah Deck, Method Man, Killa Sin & The Harlem Hoodz)
The Mix Tape Volume III - 60 Minutes Of Funk - The Final Chapter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d8854c343906bf091ebd0e5001cf2d1c472e6e6b3bc7828ffef55de523f44f. 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/USLR59900792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f47c3dd4b1959f9532caa547969d03e8cd4d76afbdffdc964d327248fe15d2c. 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/QZKWA2321689.
The Black Diamonds (feat. Ghostface, Roc Marciano, & Killa Sin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7788d07b310ba78ef8a5ef8a8698630650f466ce69682a8eb3075d640b84da5b. 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/USKO11100785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2402b8f00fb59ed6a202cc63cef967b69186b2cfa715700fe15e63ea4fafc8ad. 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/USKO11100789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b9285d7a937fd27634cb4ce9f8ace1eaea0c1df12bbbe8e2e85415aa356523. 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/QM7281725396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe1309c020b5831b9b43fbe18032d344aa87c4ceb9ad0eab6370e533aadcbdd. 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/QM7281725397.
Adrian Younge Presents: Twelve Reasons To Die
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b5f0f6063fa8d80d6ffcb52c5c6106e3752246fc89b347716fa3cb487043ce. 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/QM9K31400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ffd1d0f37ebb4bb18b8abc30348a9c624355faa00158b82c858590551c2d7. 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/USUM70620622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbf1fb7f05e6b5b14816568991f7a872ae79932935dce41e7d2c0bb82f08611. 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/USSM10111996.
The Man with the Iron Fists (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cfeeee31f199db86b3c1597696e54ce0132d30bbcd96afecb513d7e0d5eef9. 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/QMPS91210108.