Twenty88 (stylized as TWENTY88) is the debut studio album by American hip hop duo Twenty88, composed of rapper Big Sean and R&B singer-songwriter Jhené Aiko. It was released on April 1, 2016, by Def J
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 0x5727d9f7be6002e9442e5c3b3d07b95de38177b9a0aee9324472ec27e226f877. 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/12c26d46-ce82-4dd1-8d19-27a3fc7c514f.json and https://artists.proofprofile.net/proofs/artist/12c26d46-ce82-4dd1-8d19-27a3fc7c514f.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 0x091171d088020067e011400a8409e3e2d4cba685ce6961e7af2e95ff7b58efe7. 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/USUM71602790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986744456a2d2a61c2adf6578a256f4e0c2f01eb5e7e3ac1ae23d8c83a2311c6. 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/USUM71602802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c067afd84bcee6310ed09c9de0b8eba2d59f49bb28f28f0205b2addee7e7429. 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/USUM71602796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e928ad9efe137c0fe6120f4fb35abaca6bcd61bb9127ebce39b266c2a71ce2. 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/USUM71602799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80daca0b03e7f2b633d44d12a7dd65f288852bf8481933410c275a9cd59f63f5. 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/USUM71602806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6c352e0224728fb11950417aecfb2a96e29a8f6a294e50253d6d832c0052f9. 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/USUM71602800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d2e4a1190421ad97467aca1dc789379c7b30290537195bd9ae61bbdd4828e2. 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/USUM71602804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad244b13712c012e4ad2b0a40e8076f16088f305ccb95b4ae75ba173a68a9eac. 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/USUM71602798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac41eeeb5eadaca371eabe5ee7fa7ee067105c5d66ce6e53435b1053c5adaa35. 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/USUM71602797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e928ad9efe137c0fe6120f4fb35abaca6bcd61bb9127ebce39b266c2a71ce2. 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/USUM71602799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b0b3af4f4f20825fb78fd94de3ba085be078b94abb7c0557738eee8ea9ca49. 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/USUM71710440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7222165ffa5437689da18dcc5587a61a700728d92caa8bcd973e784d618d4a4d. 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/USUM71615602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1f5e730e132ff82562f945cdb5005e5d93b1dcd7e868d7c42f01dfb00db819. 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/USUM72016346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1f5e730e132ff82562f945cdb5005e5d93b1dcd7e868d7c42f01dfb00db819. 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/USUM72016346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e928ad9efe137c0fe6120f4fb35abaca6bcd61bb9127ebce39b266c2a71ce2. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USUM71602799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e928ad9efe137c0fe6120f4fb35abaca6bcd61bb9127ebce39b266c2a71ce2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUM71602799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7b7e9e70db54c274805fb610ac6d45037360351ad96c5b7fefe965ae0867e2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUM71602805.