2 in a Room was an American hip hop, freestyle and hip house duo. The group, formed in the Washington Heights neighborhood of New York City, New York and active between 1987 and 1995, consisted of rap
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 0x176683119826e6df105257a0b1722f8b00f08c43132aed790b49be57730a3267. 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/addeb83b-73d7-4571-9884-55beb3a50317.json and https://artists.proofprofile.net/proofs/artist/addeb83b-73d7-4571-9884-55beb3a50317.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 0x6b9cbac365d4ac33bdc6c21bccc343fde1f34e18fc7072ade1b93d55c17eb9be. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCRI9023701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df44e4c7f560dcc1ce4adfdeafb33debc7525192f06bfcc254230da98d3095. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USUM71506963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aa14133f8ece6a7b52bc968bb461658448066844ef42bcf28434409819c569. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCRI9522003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f189b0316efee2cfcaec63b93411ce09f86278fde16382e29f910ab74c83007. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/USCRI9522004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd437144faa72f9bbb5de864c32251730b213188a07c8d1d006eead64cca7d9dd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCRI9722809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb531f629da1603a89437b21e5f1e6f24b9057d93efa333b9608b7d7e2256e98d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCRI8720001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118983d301949e9f27f0e968060220a638d5a0069ffa514ab5ffdcb34ca38a34. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USCRI8720002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d9478be2695de8fc64b70acb39ff2e0a25b02afd788caf41cc9bb421951dfd. 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/USCRI8720003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd79d7f1f4853f2ecd4100b2b695b386fc7290d2205b98e1dc0d61ea73b4b57e. 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/USCRI8720005.
Al-Naafyish (The Soul) - The "It's" About "Time" Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13e453842bc7460e159f45d401a3d19179712cb4fb99ec8a39f8514dd2ccbb1. 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/USCRI8720006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9e70057196a4909e74c1f8ca1710b98bb7b72a51ffefbaa416bf3fccc2978a. 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/USCRI9622407.