Len or LEN may refer to: People and fictional characters Len (given name), a list of people and fictional characters Lén, a character from Irish mythology Alex Len (born 1993), Ukrainian basketbal
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 0x21d90a30733e4657d9386352baa192b0c86671805f539302160f2521dfc5f16a. 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/4933e189-897b-4467-9b60-959959d821a7.json and https://artists.proofprofile.net/proofs/artist/4933e189-897b-4467-9b60-959959d821a7.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 0xa9b175e81a721e0ecae3558255cc91362769acd27575cd8549dd002391d3f2ec. 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/FR6V81867367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55da537a7708b4511dea7da14f4a5a64d06bd337316f663afcb71d4a82d62381. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FR6V81867382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee2d48211ac280932e0651e9603353da9b6f385c68b11227584d270c7d8463a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR6V81867386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ee343dad8886af2471c99ccdf1194f27fa0dfc49ec7088339802a77094f8c8. 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/USSM19806651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57612b1c9b676fd3bf806ea5df2090527840b28d7a7a05dfa1adbf1f6b535e3e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USSM19806652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1ebaed3ac401c02cd054abccb941080b7c26cf7c15850ea5f7bfcbdf3be2f2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/USSM19806648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3365c00b4a58bb7fd42ba808f663bd654d73007a07d20f7f7d7efb60780932f. 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/USSM19806653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843d008bcd483f66f70e090107826f4cd051f482a656c728753232babe9d00b4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USSM19806654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff2b69ef343fa9569f6630f68277c434c7cd8a2b7337b62a3082e81273ae9f1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USSM19806655.
Crazy Cause I Believe (Early Morning Sunshine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf4b895634d0fa4460e60f272a5e1b29f77b12f14adc8e3b9ec69285f1a4952. 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/USSM19806656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093fa6e95eaf5f1359df04317bd85247185baa224ed47e06241ea28cb5656bd3. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USSM19806647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b75940cfacfd769f2b805e3ae9bb55da8117c5439f206cef5dd7895fc78768b. 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/USSM19927007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa662bf0bb0bf73c9446192185c043a344e26b0111feb687224dcbaadaaa173d6. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/FR6V81867398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030307624e91474686da01e709cbd714232f848a1bdf8b41948644727c213a9a. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/FR6V81867364.
Steal My Sunshine (Remastered Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a3256b3a123243fb3cee881b8d5fe185594861f5fcf6a116ef6a4ba88c530c. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FR10S1547399.
Steal My Sunshine (California Realin' Remix)
Steal My Sunshine - California Realin' Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136e17dc3b3135fe1c386d714108e9907b86d3f92655a6160ca8d4213184edd2. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FR59R1600635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33ea52a5ea5161f1d3d0a5561aa7ea4c16ee7394d8492fd7b4174a5a814b70b. 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/USSM19900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3997a4414bf4b38b3820487973468a7fc9e2b424d52d49143a61d9c2badbc5cf. 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/QZK6J2192979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33ea52a5ea5161f1d3d0a5561aa7ea4c16ee7394d8492fd7b4174a5a814b70b. 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/USSM19900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce80de692b175b6e2ba1db3d54de94eeef22848cd3c34f2bd28d1cfa20ae1b95. 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/USSM10028921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33ea52a5ea5161f1d3d0a5561aa7ea4c16ee7394d8492fd7b4174a5a814b70b. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USSM19900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bf754c38a8503ec4cd7882f4853aec21ae2db4cc540f7cf2e12119c270f7fa. 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/TCJPS2229569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33ea52a5ea5161f1d3d0a5561aa7ea4c16ee7394d8492fd7b4174a5a814b70b. 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/USSM19900189.