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 0xc4dc2a9ac96ef59dd0de7e17a5e780110f5d8c1c5f838fd8554a2c16ab6cb181. 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/c3a221ed-92de-4f99-b4fb-04f8235850b4.json and https://artists.proofprofile.net/proofs/artist/c3a221ed-92de-4f99-b4fb-04f8235850b4.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 0xf00bfbc8957e9365d8381dd96f09a594836858e8f699f05a66a0e3b74196b6bf. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/GBSMU2699793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126f916d505d4c4357eccb7a0bcd3bc560247bb18dd1a259e854de9c80943d38. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/NLWV71600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb88802694abed7247109fcddacda112150f3ac68219099901f441a6a1457770. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/NLF711705906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c93d5860aabfbfe5b13d38e8bc3bbe63b15366ab031c77ce23fe4e3b1adc64. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/NLUW21800662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883ff73f7d91c932489c53fe4050e2c5fbcf314e75213816f696fc35e9427131. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NLUW21800691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdba3e2fe982297b27f4f77829cce4f37cfa86716c92bd43bb2d7559ddabaf3. 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/NLUW21800754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93665974ac77bb327e8cab6b0cf90a85b53c4012ca76629b2ff0af53bbc065b. 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/NLUW21700620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a874a5f34176b3ae96f2cd6b63e164393c9b77ffa371a29cea40632beb1e648. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NLUW21700621.
Wake The Giant - Kryder & Tom Tyger Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae894a37b471044a9ea6d3c102cbf6f1bd1b1b906eb53c91125907fc6cc9c77. 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/NLF711506502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd77a4e6448afa02e8599d1a1fcb8e8f9a8cc4763ced609ddbeab97ee2814d5. 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/NLUW21500207.
Nicky Romero presents Protocol Miami 2017
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd81f7fa43df2ef4876a00df32ea9537ae90c5bb2ceb9561273b97f2146a5def. 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/NLUW21700513.
I Need U (Mix Cut) - Tom Tyger Miami Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07804e96ea5ba70abd0521689341839bbbc1078138a23eecd15d92d293d8487f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLUW21700528.
Protocol presents Miami 2016 by Florian Picasso & Blinders
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02fe2ce0b037c65a7a8357a2c7be5761b643884ebada0852de08ce600b3e707. 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/NLUW21600277.