D4L (an acronym of Down for Life) was an American hip hop group formed in 2003, composed of Atlanta-based rappers Fabo, Mook-B, Stoney, and Shawty Lo. They are best known for their 2005 hit single "La
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 0x31effa74ffd78296be51badd787218921e42451d51f12dc7591dde625cec9909. 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/0dfccc35-e6fe-400e-aad3-d84947307b07.json and https://artists.proofprofile.net/proofs/artist/0dfccc35-e6fe-400e-aad3-d84947307b07.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 0xdbe8b5ec75f3d21d8cf4b26c98b8da12fe1beb3c09bf2d2a7018ce7581b0100e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USAT20506928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02c2c520f113ef9cdd3089dbcdb7a690f9903f1ae57460d40741303a9058ec1. 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/USAT20506532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734c04f395f0d49ba617ebe532ba101cc1effc9e126e80e8f9c0b656fca57fc9. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USAT20506535.
Make It Rain (feat. 2 Short, Sweets and Kool Ace)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa2c62dbecb4f2bfcd2e618f35717d3af3b529d380d715285b65f06ed0dec73. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USAT20506537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c6a26e38e67aec5b9d63f13e6ff97cb9bfc18a48fd84f69fea2ad103308bf2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USAT20506538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2d934d570bb0733542b43d4d8d6d4d18242dbd2fcce93879ad5c0f9a7c5335. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USAT20506539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5b5cca29a169aa7be419263f8ea94bee2188391e6873ac931681d8c6c68189. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:02:53Z), 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/USEA20520566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54eaeb891057bdc0891a2d4b5a8a24aee7b41296229ccd67d94873ab0c63b2a. 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/USUYG1055382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a52b0c4530563f841e709d86b3af5c463d654ee838e839865a0798285e48a6. 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/US3L30404921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d33e97e4654e96ef2b1d52c650d6e5368be72ab8b489d7d9c016e90d96fab90. 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/USEA20520540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d33e97e4654e96ef2b1d52c650d6e5368be72ab8b489d7d9c016e90d96fab90. 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/USEA20520540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d33e97e4654e96ef2b1d52c650d6e5368be72ab8b489d7d9c016e90d96fab90. 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/USEA20520540.
Betcha Can't Do It Like Me - Amended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b132a8ac1e9d3ecaaa0a5c3ab462135811fa40b305b0c156c4db1b036ee55b5. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/USEA20520618.