J1, J01, J.I, J-I or J-1 may refer to: Vehicles Aircraft AEG J.I, a World War I German ground attack aircraft Albatros J.I, a 1917 German ground-attack single-engine biplane aircraft Junkers J 1,
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 0xa08c35d4a849c5abfd0aa79ba34c4d2e72a3a0cc084a1c73f23eca841dc9c245. 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/d64d880c-a997-40b8-b2d1-292872886673.json and https://artists.proofprofile.net/proofs/artist/d64d880c-a997-40b8-b2d1-292872886673.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 0x15457598086565cb9b1e7f93b20aec9ea4f7e1260617160f569112ceae3e8eea. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZHN92197691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648d46928108225fe7db01a231dca4a15e9aed79d58d2801d2a9ee8cf1e4b25e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZFYZ2263044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8f8c604aea4722641d63032f77f8c3dae1416ec73c85fc7f9b079805c1ede6. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZFYZ2223075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc58e301d225865995af52cd28ae6faa33642926c2cb6353fc642169663d0f5. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZTB42264865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82eeb5e1cb9d7b97df5d5d776f5e7681313a21b91a002c51184ad1d125a15ee. 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/QZTB42264867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dd8abfa3e39799ede8f3ba5eb78fcebfcc9009c9ceb834c2a8e63e9d09f359. 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/QZTB42264869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c73b699c969013e4d39b9d18d9feddba96368b3a7afd799d794b7bd322ba6e. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZFZ22369948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331a41a3ab6a8dadf354b2ce9112f13fcd417b1e46b33b59fcba7c58e43dd26f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHN82301192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad954615ce9d2b39fa6b580733a4263dca12f2d71379067e564b9acf8a651dd. 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/QZK6P2369266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5ab5d54eaa0d00861188bbd8c602773a3c6ec90c1b793109a5bb7dfe89932e. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZNWQ2388626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3031d133fe6473fd9b71b4d841e765b1e6cdbb7c2e193d19b0e379414789d49. 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/QZPLR2367811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d707118bcd490b13539cdbf031abde63a6adb740afc2058fa4c58cc87265e4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZRP42346780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef428ec5fb2f609e58ba56a9d703e76bd3dbc834644786829eea44db685dc8e. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZTAU2335802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cbfb22347a01774e0bcb49aeba916d11907b560b161366e64499898ee6a212. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTAX2345417.
Stackin' (feat. Dufflebag Shots & leftwrist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0aa2c6cc15fd018399c50785ea5d16844978140ebdc9d1dbf88d71d60f205ae. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:19:37Z), 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/QZWFK2305125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e761f1d807061ac96b320b5cce19519eb8ae84c5e030c426e9c882ff71d54d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA82442358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193f267ef37b537a1beb7f7beb70e4fcfc3f16319592b81b38aa53229097508f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZTB32426648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5825509830b7e2fa97fbc0329ca3a30a480890cc363a8e588e91efd343d603. 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/QZTB32426649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefb420c540f261e55a7a6204f62bbee7b1bfcfc702a636ccbfce4171592cb8a. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZTB32426650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137bd8a5909ac9f113fa9767c5146322b128937ad4aeca80780235f26e2aa9c3. 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/QZTB32426651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072d73d8217e7388ce7fc7a166cbab2cde012af00830e2d7ac3f9a67876c6876. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTB32426652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2946430accab81da593753c2518406fccc34d6b1d549ce12a477cf232189d884. 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/QZTB32426653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa71bbe063c57c157a094f997eca6eb75c6b095ea4d164a1452c1f19beb9e5a2. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QZTB32426654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008617f744cfa5aac01ebe7fbfa24f0ff29f1d5f7ea8e42acaa83ae07a4f2cf9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB32426655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f311450a7c40f2cec542418c478bdf20cd52c08888e1db6501ccc500755ab0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-27T13:25:06Z), 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/QZTB32426656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43efa82b702d13e9d4d711ff0a17e6904b456b2df50036336bc943dcf18c1d69. 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/QZTB32426658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc822e67247a8866eebc9ad22c09dcde948a48d93a3c1ed585522d6f06de443b. 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/QZTB32426659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bea2484d93283002e27b028b4b19a084a2eced02c65ef56d201402ed6fd35ae. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USLD91771874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11891617e299652a67fb3c601853e4fc703bc4c1169e5dbe2f63c98cd8c1ab0f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USLD91771876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21377ac4935fa0363e2983bcdac667643303e58d7be4c3f7fc5b8da0a74f66b. 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/USLD91771877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc3c94a931866685191a71b4969f5dc7fe6fdbc130a789e2fbe538014ed6598. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USLD91771878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccbdeb0844c565de50e4c0f5f576c6fd41ceeb9ca17147e200cf9e84f51d54e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USLD91771879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e72339464f4e3177811dc32a2a7ed970c4ce6f425dc483138d1b28f606e4873. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USLD91771880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e89577a8c8cd72dbe391f37d1ba233f4ab94ab1310144aeb14d14f88090a29. 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/QZTAW2469451.