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 0xc7461e1e306bc35d056038526157d006ae47c1f54b41922a77a364692b3daa16. 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/0cd73193-d3a4-4468-a557-75131812fe7e.json and https://artists.proofprofile.net/proofs/artist/0cd73193-d3a4-4468-a557-75131812fe7e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pure Beef - Rap Instrumental Hip Hop Type Beat
War - Rap Instrumental Hip Hop Freestyle Type Beat
Sad Keys - Rap Instrumental Hip Hop Freestyle Boom Bap Type Beat
Saddest Piano - Rap Hip Hop Freestyle Boom Bap Type Beat
Alone - Rap Instrumental Hip Hop Freestyle Boom Bap Type Beat
Tiradera - Rap Instrumental Hip Hop Freestyle Boom Bap Type Beat
La Calle - Rap Instrumental Hip Hop Freestyle Boom Bap Type Beat
Sin Ti - Rap Instrumental Hip Hop Freestyle Boom Bap Type Beat
Extrañandote - Rap Instrumental Hip Hop Freestyle Boom Bap Type Beat
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 0x2349daf46c3e280db86daf7bef11a249215a1642c23f81a5e73789951c3c95f2. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/TCAGR2241731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1209d74e7ea0ff87259322caf764720e2130d8276a5635e408447a29aa651bd2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAGR2241747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7e35e73b5f692710b59d566643d31b8e0ff442013e531dac2985d49b84e790. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGR2241781.
Instrumentales Rap Boom Bap Beats, Vol. 4
Beats Tristes Instrumentales Rap Boom Bap, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb538d9fb2366382ce36c8cb8a68495d791510ae279d08f06bc1fe72dc7694b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAGT2330665.
Rap Instrumental Boom Bap Sad Beats Vol. 5
Rap Instrumental Boom Bap Beats Tristes, Vol. 6
Base De Rap Instrumental Boom Bap Beats Feb, Vol. 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5f9222f1fdee3e1a6aa3e928d08411d52c9f1df95ffc604d59c162f13186ac. 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/TCAHI2342971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6534550e369c9055a7d365f8b3647f8ac839f704f8f03ffc5ef41ce717024a0. 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/TCAHI2344717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8add9de351eca105b30b670de7452ceff8d963ed26414ac1d4dde105231832. 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/TCAHI2344729.