J Rabbit () is a South Korean acoustic pop female duo under the label friendz.net. They debuted on November 27, 2010 with the single "Take One". The group's name is derived from combining the letter ‘
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 0xa83462dfc73cf9f1a81f8c1b80a7b59a91ca95937b3e8dadfbef2374663c4690. 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/61fc6614-024e-44ed-ba52-268d53354643.json and https://artists.proofprofile.net/proofs/artist/61fc6614-024e-44ed-ba52-268d53354643.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 0xc654ba0d2d3360b127c7fc1de713ee888d6d19b08e83b4dde00a90667e6b5218. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/JPG101122202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef849bd6a1b8226c0ba3f14e8aa6c7188c551d30a1a49067e6f308e537f368f. 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/ATR981130847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13ab5913bf7a731153d3975ebe092e78e87db805292c0d5b1f80a689032ed2b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATR981130848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9105e76968fe9ccd014de1ea4bf111b86f8f8544ac23b82ac073894d301acf08. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATR981130849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce45d76263227debe3ee241dcc3a862b238c3eab4cda6cd621aa028391e6ebac. 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/US9BP1250388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308eb4078740087b9b8e288cd3e8ba1c66c0062cbc5214a7296e69ba0fbf0129. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZF452033377.
Monstar (Original Television Soundtrack), Pt. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62c7505bad9780bcfb652d30376f3dc633dcfd6b4242511bb18e338912d97f1. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ATR981150197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1671ec84703d78b153446968ca72d72453da29d6d853c9b1fe3727a03019821. 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/ATR981150203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6f5e808d1cbeb8e8fa571498add18749f390e4fc32744284dfa8b288a55793. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATR981150204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744ab767ff9e960ad24cd2539865f2b067f889791731f8ef6865cc23eec18216. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/KRA381704470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf8f8b7eba8910d27956bbbb8fdd9c9e0459bf956bb09405b68997474f14fad. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:47:58Z), 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/KRD471600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8570b6cc0fb12c0782906a5a8fe5360dc36276f58a04b8569a250436f7835ecf. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/KRD471600003.
Monday To Sunday (From "Don't Dare To Dream" Original Television Soundtrack)
Monday To Sunday - From "Don't Dare To Dream" Original Television Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa82f4e2bd055134be18e22137a2f191cb1f3f771c3869ac01e9a3dc68c8bfee. 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/KRE041600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780f714f83afc46be8ceb4c913a62eeb5b079695f6d341c42661a7344490fa30. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US9BP1981151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81494e846562fa18ea3bfef1a360fa741ba73658cee6f9c451c4e657efc1e63. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/US9BP1981152.
HOSPITAL PLAYLIST (Original Television Soundtrack), Pt. 7
Let me be your season (Compassion campaign song)
Record of Youth (Original Television Soundtrack) Pt. 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5d02d1fb8529018203354d9f9a1439ed0282514be0261d36a88a4c13fea075. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/KSA012214751.
The Interest of Love (Original Television Soundtrack, Pt.1)
It’s Beginning To Look A Lot Like Christmas - 2024 Remaster Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c68eb120a1c0854c79d9d602bdb5f22128b62490b397fbd3b11a490e313aeb. 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/KSA012361584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad2cd7a945e266b120885df5c330c50eaeec45aaf00899b06447b7226d83924. 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/KRA381900407.
Record of Youth (Original Television Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7826d0d40920da9c0ffaa40a92f671209c0cd26e4adf81c50c5758afc9f437. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:01Z), 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/KRMIM2027364.