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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7310785f2482f44e21e2ec95bc238a65e6fd39ff2cd81b5752f8af27be2978. 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/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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df568811a344e01d7c7508e8d14d4e6eca0c90c43f5df59297c22dc71cb9a17. 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/USGQU0700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4b7169e1d317046ab5765988ee3f6d693bb81c3c734dbbfc0327b9874a7339. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USGQU0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb253f2c4cdc5c69a1e6950c6428029d45b409963c3163a13985b686234d98f88. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USGQU0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cd5a14b46eb4a5bb85de22dc48167151532340b37d46a9a1167055fcb4ed69. 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/USGQU0700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdb2e21330f41d646dbffa5b16655f526c51c4b71e094cd292fe52586dfd352. 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/USGQU0700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a34838e11285d092b173bdfaa30c0571aa13a5285d89dad842b45b30f38011. 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/CAD431104301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e351805109fcb490672fe0cf32fc4428fadf0e972c329be7ab692defc3e470f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:06Z), 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/CAD431304905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83504db45251a588320d63ef8b8b5e61019e5dbe50bffa204d8fee7cf4793dd. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:28Z), 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/DEU241300609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802960aa6c6f33850945326aac452b9b780dcde71da626e2b5c11971215f0120. 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/DEU241300610.
Hip Hop Hanukkah: The Best of Jewish Rap
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4b7169e1d317046ab5765988ee3f6d693bb81c3c734dbbfc0327b9874a7339. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USGQU0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb253f2c4cdc5c69a1e6950c6428029d45b409963c3163a13985b686234d98f88. 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/USGQU0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b8d08031dfa38414849c2797d1f765f4665a440132a2257625acd670968ce3. 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/CAE861203012.