Ill Al Skratch (also known as Brooklyn/Uptown Connection) is a hip hop duo consisting of two rappers, Big Ill from Brooklyn and Al Skratch from Harlem (Uptown). They are best known for their singles "
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 0x4559c63e0e984c95b350d67885717b81cd645c362f7580dd8746d19be8b44ce3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12d85795-3842-49cc-85eb-4e2684d0ce2f.json and https://artists.proofprofile.net/proofs/artist/12d85795-3842-49cc-85eb-4e2684d0ce2f.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 0xb07f2f4056310f0d8b45605320caba208cddb9ca2fa87c2053c2244549692cd4. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/USPR39402041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613aa07f69a0d487142056dc86e73f00c814af45767072df85b232c08b0e2afa. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:02:52Z), 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/USPR39402053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf9e406fc462f591238a893635e57e022479c6e6dd792434f4e53d6b066fe49. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USUM70623500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ede2f2a0cfdc0709e0b56892c358cb58440c463d35912aed80827d3852eee3. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:56Z), 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/USPR39402042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613aa07f69a0d487142056dc86e73f00c814af45767072df85b232c08b0e2afa. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:43:35Z), 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/USPR39402053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55188f6def221c2c1f44be8986edf57b6a56f0f7d53448ce2ea101dd8262bb90. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USPR39630118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe34e14a5ec7da1a60cb989aa709781c3675a28aa615fde266aadeffdc78042. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USPR39630119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e139e5b56c194fb6205a2ada62bd7064a0ed5cb0712188e58f08d26843689e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USPR39630120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9070b6929db78cc6a36b7fec4c9367fe569f48582ae1726bfedf7b01b684f890. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USPR39630123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d6b7fa2b47d4c200201c280b8667862e0bf836218d22a07d20424a1088d0b9. 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/USPR39630124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35e26d8c5890789e1f134cb53d1b8a618475c05555897c7f21241c77c6351a1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USPR39630127.