Les Savy Fav ( ) is an American indie rock band based in New York City. Their style is influenced by art punk and post-hardcore. The group is known for the stage presence of lead singer Tim Harrington
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 0x698593f11f5a43e38ae2c2d34023ceb7999ff539bffaa6b36367649283699daa. 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/ed34eafd-f0e6-4876-b618-dc90600ccdec.json and https://artists.proofprofile.net/proofs/artist/ed34eafd-f0e6-4876-b618-dc90600ccdec.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 0xbd6f9b4210b8f01106cd582bc5c4e38e2be022467e611129e5af985c3f48614d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USA560311905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fed1c71feda93c952dedcc635e46eae06a105f48b4a5a9ee0bd8476f79eae2. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USA560311906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd85f9f84577b2d6d6a22e38186c14b3126217550e3a0219db1fd574a612ce3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USA560311907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8109b5c7f5bf02910e749eab79ece5924678b75ce13da4ed96d68feb3c4c0c0f. 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/USA560311908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad2baf2d1271cf3e498fc0f4f21cd630e426c861e1d2bc4a6edeb4cc1a8091e. 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/USA560311893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f7634f67bb58943a95047f2e76e40a5d07d3e7cddda776d09420e7cf8dc090. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USA560311894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8956db0a0f663243c562c82843de23fa3b9fca1fb627bc66544eb94b92be27b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USA560434633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e49a593865fae30114d2922a9f9796d0770afa7eeb9caf648ff9ffb82cbd595. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/USA560434629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d23c47906682e8eec7b514f3956aaf61ff0d85878c0e5d4d01a2904093d59f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USA560434631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8520b071b238f040e44074836efb79de8b6d7ada9df18e82f8597be8eb194360. 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/USA560434638.
Les Savy Fav Live at Cat's Cradle 09/16/2004
Les Savy Fav Live at The Casbah 11/14/2004
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4830ba0d5160b3d37a6edfa78bf13827c7cc908041488743eaf63e0ed3132c60. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USA370567855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf203e71f8b42267b38615743fc764da5efdcba16112957fffa801f07b18cda56. 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/USJMZ0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87487a64e0c13d43bedea5979c789a58ab6223db1c5ecd2766f41d7086c9671. 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/USJMZ0700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f10aad2303dc5497d722947b5eb74ce16d902189d9ec1db9487662ab01be60. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USJMZ0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332a80a5357fd8736be107085614952e33bf0f32e34d6b5caa57eea77d67f25b. 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/USJMZ0700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75679a84dadda4282115f2fa85e1af75d8cab20b9cb9def12f0e47a0bdba732. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USJMZ0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d300a01eae7c6446af420bfd7c21e4d727288695b124b747104ff227048ceee. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USJMZ0700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07de13723edaf6fa0c0173cd3060c5c264c05dc838ea360d32fbb370b6d83470. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USJMZ1000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c09d737abcc5e499db2a89940e1f5253fd2fd5e11e9b40cfa5e41f6d23d6aaa. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USJMZ1000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c0444ff054ce365d18b4b748c1a2eda483ca7e203034835a2abd04ca778f96. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USJMZ1000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a5bd58bb0ff61ba547fc45fa0239e8dfde53d24abe3a49d9b420dd39cd5d48. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USJMZ1000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cdd207b4f8b26fa2de793a0bb3cbd8366664fa4647154f8f68a21e8c188f08. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USJMZ1000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaef451dbd57ffd4d3018d5cc15da7eb66053c384deb02f1cc55f9e09359e56. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USJMZ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe475602637421c6ed4134be22ddb3e8688f29a166179458a69f020bc21229a8. Chain 2 (Bitcoin): anchored in block 957839 (2026-07-13T10:06:30Z), 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/USJMZ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68171a50b6fd703d461e3eccbd2924562c216a0d77694c72b0f84ad0df5266b2. 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/USJMZ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c37b3ced5434f69127a6a9273ba639ec09e79dcc997ebf3b59012d811e9ea8b. 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/USJMZ2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf7aeceb992437ceb0856d38da03b6dff4a84d7b9e8e04d2d89b193f9b67839. 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/USJMZ2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0400ca2a81e11b03b210d090196f751a76db49996ff9cd335f80f095233dcc3. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USJMZ2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c333c79bac95a7dfaf21547a7077692ba695562dc34169f21a31a7ff3ee4009. 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/QMRSZ2500371.