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 0x7e54d69769c8dde0aed3d601e6f6abc68913710fdbfcb20de1449af37e58f787. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b8c6fa1-600f-4bb2-8b8f-a142e66f8ab9.json and https://artists.proofprofile.net/proofs/artist/6b8c6fa1-600f-4bb2-8b8f-a142e66f8ab9.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 0x78ab0cc13ea46cd8d872e0989b4d538d55685caacee131235de5e0f7284f5f7b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/US4LK0501721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e3a0b84fc6d1633c714e20382b4d9f1bdc690beeabdc3a61d301358aa3e78e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US4LK0501722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b96398f2abb07dfc9b54b7e06447e5ab2c819869bc0502d0411548ad910be5. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DELG70900139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97fe89c2a33db61ab261a8a00aef889e4d6241ed35e9b2dca80b0f360d5b7fd. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:39:02Z), 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/DELG70900140.
LEVON VINCENT PRESENTS: NOVEL SOUND ECONOMICAL BULK RELEASE
LEVON VINCENT PRESENTS: NOVEL SOUND ECONOMICAL BULK RELEASE Volume 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093f4ff85f24cd92f5124497b92b8dc858178a4edc9023a2d268a39cb8547325. 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/GB7NR2328904.
Convolution - Levon Vincent Remix Levon Vincent CS-101 Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2803018544a59396f8a173a81ba400f20d5e92fe7c747fc23f43bbfaa0d71f6. 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/QZMEM2379848.
Convolution - Levon Vincent Remix Levon Vincent Scream Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434985cda2445deec006673c124d04aae2e9a2f701e69ec327a5963d0fc706eb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMEM2379847.
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