Six13 is a New York–based Jewish all-male a cappella singing group. Formed in 2003, the six-voice group is known for parodying contemporary pop songs by adding Jewish themes and lyrics. It also sings
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8694fa6c3d86720d46467ebfbfda90c7873e582c14b44b5430e2dd6edff51f31. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0a4a6ba-e655-43da-a7ec-37a109b87195.json and https://artists.proofprofile.net/proofs/artist/f0a4a6ba-e655-43da-a7ec-37a109b87195.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863fa7bd1548a0a01f2bc6571f98a955e4fbf3a876a444d18d8c970a5594c410. 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/GBLFP1515442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a30410d8599ff1b244b7d0dcaa097d96a74ff7e038646f3485f824d1fa21927. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBLFP1515448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7865a05c4b2d1c59e2442c603263cc3ee23137eddb9f741e6268d61cacffffd8. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:16:31Z), 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/GBLFP1515784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7ca81939f5a9c05e0e81238e176e3053fa279f77b405a05fd9956379f9344c. 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/GBLFP1515930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab02e23870579bdd82c9fd8a974b4446ee60cee23110e43e4633a321d3cd716. 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/GBLFP1515931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24c4a2ee8a89b36056bb2158b4ec29231cd294a359a76ff92e44d6353984f5a. 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/GBLFP1515932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e6075c7702ae68fef5a9e9a5c64ab363accb22527443d6a7c1ca1b1df041d1. 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/GBLFP1515874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2666a21304bf2c90afe19e023e4d4b7a49f7d77472a49573af3fa3959139ed. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLFP1515935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb235b7d6dfe313b8974d4f4fc3fc9b6298c640379cd03707af85327c2656fc8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLFP1515936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23679a91e46f8ce6ddcede3c5e4238310eafe2560eaa58cca66804efd9c60d2b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLFP1515937.
Yesh Tikvah, Ki Malachov and Mi Shema'amin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da1872ddc7a5cd758fa0ca099e271631ac991ed9df3df912bc3b7dc586670d0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBLFP1515367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a5a83ed94a8b5414bcc0e37cb32a3636ad819493683924fce29ee7847d20eb. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:20Z), 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/GBLFP1515368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3189ddf7815aeae70495b1ffe39d4df0f6adc07ed36172cfbeded8bafb2682ee. 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/GBLFP1515372.
Hashem Melech, Niggun Hastarah and Am Yisrael
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e7a5b0d95ca74b216eaa982ab09118eb34fc16cff2a7bcd03afcf1521ddf6d. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:49:10Z), 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/GBLFP1515288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84ead66c7e82868da97b29beea52189ec7056f08f9031897f778d6bf4d1124b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:59:45Z), 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/GBLFP1515289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47792d519c841863cf01dd23c71f9d51509c7e0ef9f98971afa37b0c6872697. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMEZE1710952.
Schar Mitzvah / Hineni B'yadcha / Ahalello
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc9b6c9fea8b2da570c96a07f797b66f948cba56b36a53fb69fd32a6cd94b65. 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/QMEZE1710953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5676470ed225de290c674ca1bda425c542fa866144835d32c45e0b7334e3eb. 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/QMEZE1710956.
Eliyahu Hanavi / Kol Hakavod / Baruch Hashem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd4529bfd5bdaf41575e10f35afd02bd7b15564e2a087c237e7b284626413a3. 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/QMEZE2002471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771df78add250b8f43ca4ff17358fe2505a88ad85c39041d62b31dbe3e10f9b2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMEZE2002502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e23cde6a1bddbc352d3b5122ba1b687b86e0e4f4bf16c6a13ca5b69f5b3459. 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/QMEZE2002504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a42a9ba63ffaf7684a45aea840164212fe6cadc493837f06e6f595522fd6f49. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/GBLFP1663971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190b2fd3de63ee1d5bc40ce8c8095c712048d46d535622d0a21bc4816735e989. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:15:12Z), 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/QMEZE2009436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5b1f0180add568fbcc930adb422e658145d6eb58bd7e85179e15dca154ca34. 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/GBLLT2220178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712cdc9d1e65bf0437d24f636b90f6fe1ea84db071b9ca4aef8460ef4ab2b18d. 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/GBLLT2257420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ced304a808a3f0e068691975b4d42357fd2fec64228a69cecb4a4cad310b292. 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/GBLLT2323208.
L'maancha / Ki Karov - an Eitan Katz kumsitz
Era-lution of Taylor Swift (Chanukah's version)
Era-lution of Taylor Swift - Chanukah's version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50980ec1c03d7177f710d9ee1aa98af444b6151e6bfc5b4f6493826c6b23bcce. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBLLT2354447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67712146b42f9ce165f8e42eee688afb0b0caa10c46bf43e6cce15bfd479dd73. 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/GBLLT2410106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d96e8808b9aa9d874a4c273ce9b639ae8294d82f3ff331bd4504e6b6498eb58. 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/GBLLT2410347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7329822a7811b9feb5c0fd51ff9759729d2637f2101662829bc22b36d6632340. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/GBLLT2442686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0697769c4ce458f1ce061b2616a13ad59b7c1ccbbc1c7487e378e0d7b5e3bc03. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLLT2506901.
Yesh Tikvah / Ki Malachav / Mi Shemaamin (feat. Six13 & Benny Friedman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa6589f818d4d987021bedba6266b123d27ec1e0b2363f48e3e33cffed43aa3. 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/USCGJ1436043.
Tefillin (Parody of "Poker Face", "Heartless", & "I Gotta Feeling")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77ec44a2c1e84ff15afd4cb8a5cc9e28babdea9d2d33566e546b7455829eb90. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USE830900494.
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 0x5c4ca024832a8776ed245171daff4889c03eea558ae935249eb726ffc53e682e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCACL1641428.