Playaz Circle was an American Southern hip hop duo, formed in 1997 and composed of 2 Chainz and Dolla Boy – both of whom originate from College Park, Georgia. They signed with Ludacris' record label,
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 0x54b6fc832ccba6481038f96748876845171ad0347fce54920e029a82ca07fefc. 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/682a6eb9-de17-4d94-85c1-2066d30955b3.json and https://artists.proofprofile.net/proofs/artist/682a6eb9-de17-4d94-85c1-2066d30955b3.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 0x6d9e2874bab956c4878750290fc91d00d717a5112f1885a0a18749680a3a542e. 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/USUM70757463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c1b7d8ead7493fef5d04aba6a0a330e77afd083a6509160b843083c2d7175c. 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/USUM70757466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f054f4933f360ec4d7d6eb2496788ea7d3d18d2acd6227a7d2575e45447b36. 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/USUM70757461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268999be7503e32b2710736a0163f16a818a24eaea7ec2926b5b07da2f24a693. 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/USUM70741079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad6f8cf159289112399e8de5425b139d3ff84e6f01d650ae461b943f3e8da80. 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/USUR10500214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a2b1b92f5f9dc2c25aa5b79e3ac062858f29b3d6e60c21f1744bebee423973. 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/USUM70757550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4647171558b89a4239801201d4915753a9e741151f03c4dd99961619cc84bda0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USUM70757510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1984cf7bc739ebdbef4904a176c11b7b5ae235d765f434925e8e8bfca4630f. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USUM70757499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa474b51c1a826fce420644b1c6a197ff5bb2efb2dcbf55c2a1664273db50768e. 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/USUM70757495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36ff54d13c46ab903200e15eafccc4ae9062799966986b260a88f997b85cb2b. 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/USUM70507562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c43cc324584ad00b2b280e9d94474fa436aeadc62610b4e1e37af5d8098059. 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/USUM70757497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39c34734ded521b9ac93fad24bdb567c3a49b056fcc795c65e0a5c59a3c5161. 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/USUM70845513.
Ludacris Presents...Disturbing Tha Peace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fcb625db79c866274a9d9c72c637aab503f694f2c06a26bf0cb2c28034f5e2. 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/USUM70506896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3144e61d1846ef7cc01f02fa1a0b9653db354e45e07e2a1d29fb5fa25810a3aa. 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/USUM70506886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0444809f35aa6b2c35ea97ca614f8791acf8f47eb4fdf868a72205abca682ed4. 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/USUM70506884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6391397465b4acc05abebeace330664c6d2cf0993e3d4800764d0cf5355065c1. 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/USUM70506891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf657b0a1943be48cb5018087edefda9e14a5650a4826365080237ef6b06919b2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USAE81051185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27994613d277c6175d9ccd5cf528a008869908b145b6788442b169a24dd22216. 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/USUM70506919.