Blakroc (stylized as BlakRoc) is a studio album produced by Damon Dash, of the Roc-A-Fella Records label, and American rock band The Black Keys, which provides music and vocals. The album features se
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 0x9b0696481ac604cc852a3890dd042caf345bdbc09baf3f25aa2db432a2f0162c. 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/f3bba70c-a891-4891-85d5-7eec5d2a37a5.json and https://artists.proofprofile.net/proofs/artist/f3bba70c-a891-4891-85d5-7eec5d2a37a5.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 0x18bd65a4435788f06fa6d84bcfaee16bf32fcdee7f2f3dadc70e842cd30d45ef. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7FX0900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8ddad641bbe0c2140bd72f62fd3d58d20814b1f262dab18c2098d9c6ff1c92. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US7FX0900009.
Stay off the Fuckin' Flowers (feat. Raekwon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef414f35dfe4381aa54fef1ffef189eb159cbf11e1bd6ee13a1a3d92efefb726. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US7FX0900006.
Hope You're Happy feat. Billy Danze, Nicole Wray, Q-Tip
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71636c338af9fee5334fdf75468974561d350869d6c4d6e47d81ac6f1d7e4ae5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US7FX0900008.
Why Can't I Forget Him (feat. Nicole Wray)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4acc1445cbd58996bab18b28027ac4da5d6790d7e3ae37b81525a86d10f7b42. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/US7FX0900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4acc1445cbd58996bab18b28027ac4da5d6790d7e3ae37b81525a86d10f7b42. 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/US7FX0900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bd65a4435788f06fa6d84bcfaee16bf32fcdee7f2f3dadc70e842cd30d45ef. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US7FX0900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8ddad641bbe0c2140bd72f62fd3d58d20814b1f262dab18c2098d9c6ff1c92. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/US7FX0900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d56acf0569081a32ceff38d71cf41c91043dd731ef4749a3d449f303902114. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US7FX0900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887ce0d366ddc30a6749ad6bcfc16636f5cb8b70aad9567166a11d36466c1b59. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/US7FX0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42cc584d6fc8ae98ff8855f97115cbf1499297cb530574fa7e8a54bc4fe5d54. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/US7FX0900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887ce0d366ddc30a6749ad6bcfc16636f5cb8b70aad9567166a11d36466c1b59. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/US7FX0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef414f35dfe4381aa54fef1ffef189eb159cbf11e1bd6ee13a1a3d92efefb726. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/US7FX0900006.