Joshua Dolgin (born December 28, 1976), better known by his stage name Socalled, is a Canadian rapper and record producer known for his eclectic mix of hip-hop, klezmer, and other styles such as drum
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 0xed7310785f2482f44e21e2ec95bc238a65e6fd39ff2cd81b5752f8af27be2978. 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/4bfb2c48-e47f-47f3-8e67-d4ac5c377ef1.json and https://artists.proofprofile.net/proofs/artist/4bfb2c48-e47f-47f3-8e67-d4ac5c377ef1.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 0x5e4f22905c10b8e5c0cbc6ba7d797cfbaab44c189a199c8db180ba76e231760f. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/USGQU0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df568811a344e01d7c7508e8d14d4e6eca0c90c43f5df59297c22dc71cb9a17. 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/USGQU0700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c895bac1682c031089eb504f3f9c2863f45fd00bb65831b0dc1422611eed69. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/USGQU0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4b7169e1d317046ab5765988ee3f6d693bb81c3c734dbbfc0327b9874a7339. 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/USGQU0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd2515629818a95c9d93ebe5f9293378b311b30b8b1d3b1ecf72ee22018a9ca. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USGQU0700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08c5a981956439acfbeebf7b7c5e804c80f7bdf7e7eadf6376d92753e0daa20. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USGQU0700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb253f2c4cdc5c69a1e6950c6428029d45b409963c3163a13985b686234d98f88. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/USGQU0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80c1f2ed0531b3572cca789631847451325bc6cb076c05fa887b889f7137e03. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USGQU0700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cd5a14b46eb4a5bb85de22dc48167151532340b37d46a9a1167055fcb4ed69. 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/USGQU0700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ff4ff09aca4d080bfb26b0463e063b67fea784fc20bb936783e0a394d1de4e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USGQU0700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc2f1f5d774226bf9634e9d054fc10718c22944de7447a3cc3538bafe852ca8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USGQU0700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0be9beb67b980f5e67dfe62e6e750ca05e809f15ba1d77cd46ed6d183cd945. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USGQU0700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdb2e21330f41d646dbffa5b16655f526c51c4b71e094cd292fe52586dfd352. 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/USGQU0700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a34838e11285d092b173bdfaa30c0571aa13a5285d89dad842b45b30f38011. 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/CAD431104301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e351805109fcb490672fe0cf32fc4428fadf0e972c329be7ab692defc3e470f. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CAD431304905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83504db45251a588320d63ef8b8b5e61019e5dbe50bffa204d8fee7cf4793dd. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEU241300609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802960aa6c6f33850945326aac452b9b780dcde71da626e2b5c11971215f0120. 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/DEU241300610.
Hip Hop Hanukkah: The Best of Jewish Rap
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc2f1f5d774226bf9634e9d054fc10718c22944de7447a3cc3538bafe852ca8. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/USGQU0700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c895bac1682c031089eb504f3f9c2863f45fd00bb65831b0dc1422611eed69. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USGQU0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4b7169e1d317046ab5765988ee3f6d693bb81c3c734dbbfc0327b9874a7339. 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/USGQU0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb253f2c4cdc5c69a1e6950c6428029d45b409963c3163a13985b686234d98f88. 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/USGQU0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b8d08031dfa38414849c2797d1f765f4665a440132a2257625acd670968ce3. 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/CAE861203012.