Duke is a male title either of a monarch ruling over a duchy, or of a member of royalty, or nobility. As rulers, dukes are ranked below emperors, kings, grand princes, grand dukes, and above sovereign
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 0x1b6c30086c83410b2d80b6a0d5c859231da3c2ae10f12fa2533b570f3f5bb0f2. 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/cc14af4f-7519-404e-8747-d1002c3b0714.json and https://artists.proofprofile.net/proofs/artist/cc14af4f-7519-404e-8747-d1002c3b0714.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 0xee545c274955e615fa6aab7a2dbd244a6e468e25007f5de3e9d7685c3db48eb0. 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/MYKR12000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe311d4bdcc90d283b225ef2b108c38d88913deef2e5b4fc7a9335fce3ee04525. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21810484.
U Ain't Slime Enough (feat. Karlae & Duke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb44ea4e96bc5476e807feec93281daf3f1b43ae637c069ee1d9e8112167bfa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAT21810851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24f4b834674c42cce8493e24a65c7ea3e1abe656ea2c1cf91f82e256e2e0021. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5FA1750525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb368a2aaddad1c70570afc624adbe189719cb887ceb10dd3ac7e9e5ae004c6e4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1099912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aba6b72247d10b1c12495e8337636955cda3b13e3aa729b54ec45ad1a7883aa. 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/QZ5FA1750523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcfe483f26460dfe2a9d9760dce854f46903326b5f3908bf244abbe1ab00d34. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMCE31802146.
Chanel Swagg (feat. Gunna, Duke & Shad Da God)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f4028c617a23a6e8c88894120c795225eee2d12937cf57e59d76c04753ea10. 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/USUYG1160682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad76b31896b3b29a89fe8857a8dd5124a20edfe2f598d587995b89ea5d53546. 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/USUYG1099907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefba471ea13a7b95422a49001f28fa88da600aa9ae2c58eec520710cb4bade5. 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/USUYG1100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305839b699b155272626c9bab7dfb36e4fa912c0ad78d8576a4a90481cdb9eca. 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/USUYG1100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420cc7b9e196f1d8bf8f7ed39d061c787bfb9f565cd177e12f767acf9c8f22ee. 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/USUYG1099908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7838c7a886e9f8b5ed833d3fad8c238601013611387978e43bdd41c5f7e13625. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21602482.
Slime Shit (feat. Yak Gotti, Duke & Peewee Roscoe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f037f885b70f72523d7b51a2b65b2c6a33b4acd1a63c411b4238529b0f56b8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21601058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755b9d426cae5d2ab84c450ad923d466efa5842c39c9b7213f569ca880c102bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21600455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb116b94c1a7c1e379d060f41c311f79d7051216b60fbfa9506e1d519d004f13a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5FA1750956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08282dd9f5c4931fc0546c44fd5368f46f00d8f89b47e0aa90ecc355ab28d22f. 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/QMCE31701599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a96a202db5c7a3b75686c54d4d5dfa8daf53a4f084a3a015d846b25bcb463a. 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/USUYG1154248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3976ba71cff390d125724caff06bda3be73c9d53fdb29026027d2bac7d2aa992. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMCE31802184.