3L or 3-L may refer to: 3L, or Economic Synergy, a political group in Hong Kong Third (final) year law school student in the United States 3L, IATA code of Air Arabia Abu Dhabi 3L, then IATA code of
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 0xdf08db592e11be72f80e1f993ea21d0296456b1f465cd7bc2430e68ff9e7c146. 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/86c3e089-320e-4f07-8221-84f451ee58f9.json and https://artists.proofprofile.net/proofs/artist/86c3e089-320e-4f07-8221-84f451ee58f9.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 0x7eee0e468aa12eabbeff041375f9ba67d9ec83625632fdc79de0ab1cbfb4b8b3. 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/JPP561100298.
FROZEN WiNG(10th anniversary REMASTER)(feat.3L)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416f342db818df3adfe270b9ef07aa6ac1d51849b8a3b7d374f55bc2c6b2a8fc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPW562110770.
Unknown destination(HIGH SPEEDVer.)(katsu feat. 3L)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbc20746c3f7250b8c7b63a032071b73c514dc2d3c610d45affd6e9edb34e89. 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/JPW561907093.
Three Magic (DiGiTAL WiNG TRANCE Remix) [feat. 3L]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aed994037a95cbe915bfc6774daffa414e2891882eb7c80b641877381bd8d3f. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/JPW562108362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbed7028851edf587feadb58a4324267340dcb1950969792fcaa24aab393a4c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPW562004434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a099e2548a67b3439d7a3796a976206213c258f25a6f620924e45d6661de9f1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JPW561804013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ff74037b2f74dd05330a778dedfca296a1f12f356e2b075a3065dc9720b2eb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPW562108377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1508cb62191d79b7eb49cc8fd9726cb075c632d3ad550f05da68c910202d63c3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPW561804177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb9c7e37b684da0f641676fe5d2f6b3b5c30e6cedf5febafa4f4373d0baee26. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/JPW561804102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d90bdc0aa97d878fe5953248a584d6eee9945c540c8750c68c20bccce172ede. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPW561804122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0ef04b0f0579fe526af8034991efeaf1ca24ef4083f6c744f37beffa16b0f7. 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/JPW561804033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4c56d6f069e12d3ea2cd4b32f2eafd0df5eb32f7e7c403c55223036b445b72. 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/JPW561804060.
THE BEST OF TOHO EUROBEAT 2014-2015 -NON-STOP MEGA MIX by DJ BOSS-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfe35047dd38ae29ab8e02811af00bb804919930c08f97dba788a654571324d. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/JPW561809213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06346df444d8f767aa328fa6ae65646be0dfe36e46b532123969aed97ed43b95. 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/JPW562003615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8259b16fb3821ba8abd921f2dad7afba6836ea9fdf3628512a751db2b8afd864. 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/JPW562003611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475c0432390b25fe0d01909ddd79394dee0bcfbaeb6fc7b30ba65cce885b131c. 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/JPW562001916.
CINDERELLA CAGE feat. 3L (ALR MORE REWIND MIX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66861e14c434988965a6bf6e918100fcaa6552383c1d40a1c8d09e18fc1553cf. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/JPW562104591.
Liquid Total Reflection -THE BEST of ZYTOKINE/CYTOKINE2-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb131a3623ab44a2cd4ce9edac48db9bbb2f567b97a3cec47a1e05b9913b2c7d6. 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/JPW561905671.
breakable girlz feat. 3L [2019 Remastered]
JUBILEE -THE BEST of ZYTOKINE/CYTOKINE4-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1196054997f0c0f175ce673793c18990262611a463f1abcc15a9632d4f58f41f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPW562003192.