Roland "Rollie" Pemberton (born February 21, 1986), better known by his stage name Cadence Weapon, is a Canadian rapper based in Toronto, Ontario. Born and raised in Edmonton, Alberta, Pemberton relea
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 0x7dd95f5dfdcd12ea3b091c0f9e5499e4ae50849c6c86c1ae932243ebc62e8c17. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f721db6-1732-4c8d-94ca-2f7cac7b72df.json and https://artists.proofprofile.net/proofs/artist/1f721db6-1732-4c8d-94ca-2f7cac7b72df.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 0x11391f54eecb58ab9ccc8483aba34bdfa0330df866e87a07cb81a626acd43174. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAU240500012.
When It's Real (feat. Jarell Perry) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc9a87f61b35957569b6d86df895c495506e7d198387940ab328ea1e610cf9d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:41Z), 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/CAK471700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c05807bed23418b208f649407827044663a13f2eb1ac66a68a24e6936c5add3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAK472101004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3073a31620b5947949c23229ec43d8b8c8c7175616751027106051a279c5202a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAK472301404.
Connor McDavid (2024 Stanley Cup Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd274b2240bba19fc6db7690cddd2118a91ecfa211e84592587e41539cb6d0af9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US5ED2406855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b6d59e7e89edda4c55c7959e0e4387ad52a68080a43712aaaa35cd09cc470d. 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/US5ED2407334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce1127fe61a5c01c9d2f6a76cb9e4fe65eed19d67771e53ab8b570e84062441. 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/AUUM71900835.
Night Service - Whatever/Whatever Night Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5d7517836d1c7e7cc4ed0a167f40d662b03aef5f18fc5900173710a7352087. 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/GB5P51900284.
Night Service - Whatever/Whatever Day Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d356442c180a1abb008c1682722861873bf5ceb82e0a3b4b038df54c5f7f4f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GB5P51900285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0968b7ac724dff82307b3af0332a787b429371aa628bc1845bd47e7241d82c3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB5P51900238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487dac67d9ee0f288c435e06241359382129ce366c7e1bf2d101e509ddc12ca5. 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/CAUM81800257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fb3c90f8649beb746af56654ca62a4ef2ff8206e7c6338d8d53de966f5ea09. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CAAA12277301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eef19c14d1b19803727eb85d94af9cbdf41bf18d24febe7b2ea5454d757e543. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACQ1616253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430fbb0e4245e46d0dfeb7702779295f1f92d598c376d294c3745c97f101aecf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAEC1991442.
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