thumb|Rosenfeld in 2017 Roy Rosenfeld () is an Israeli progressive house DJ and music producer. Biography Rosenfeld began playing piano when he was 12, and electronic music at age 15—with a Roland
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 0x233ac2fb42e28551dce591dea8df9f03306206b34b2bd1a4688f9c9905c7f577. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0611d1cd-1054-4971-b82e-b368594df8e7.json and https://artists.proofprofile.net/proofs/artist/0611d1cd-1054-4971-b82e-b368594df8e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rainchecks In Montreal - Roy Rosenfeld Remix
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 0x5730036b9c432c4e4b7a27d1bcbc3a2bf90af327d8447cb560052527a2908323. 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/CH7532300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc68150f6dcfc87702bb9340eaf53920e98ec9cbe78b5095c493ac89a4d9153. 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/CH7532100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61b2cac48470a62ac475d18f127ef2f463c0504bc4c6ad62487c46cd483ce6f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH7532000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ca7dbb07dda270600475604dc7e568df290f3f20d28a7f5d3b68e9264b7857. 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/DEW872205068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73eaa3c2e4bd12aa818242d5d6969d0fac0aa20b79ba5e4239059e87164f2b1a. 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/DEPI81600234.
Insi - Guy Mantzur & Roy Rosenfeld Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09afb040ebf21c3ede871478dd2cfad996029b754b96b8cf259e3b1cff19ffe. 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/DET751700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca656f7fef437f1d9d16a3bc3a57e928e1bd4a7fe9fe1b1aa18fe632555b47b. 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/DEMI31400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca656f7fef437f1d9d16a3bc3a57e928e1bd4a7fe9fe1b1aa18fe632555b47b. 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/DEMI31400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06997173b848fba9bc7e90d507b5b411b7429538d976767c38a7377cf5877fbe. 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/GBJX32188009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34824c1628410fdda6a5d6dc131abd4dfa3237d0cd9809990a18fe74b4593e63. 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/GBJX32188010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e0ce3bec5f2bec499fd877b447d8457d0bb560d0c33bc29d5c6f73165ed929. 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/GBJX31988004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6122448897c6de290f6c3355910709cab5b01eee1adf054a9eb08a0b484488bf. 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/GBJX31988005.
Beyond Borders: Berlin (Mixed by Dave Seaman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6ffd5bd3f03db56a6c90a3d784ae25194a91dc9a629cbecb92f001e5d96d92. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLF711507171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1208abd56665325ef927fcdb3f6200f130d591a6f5aa298183b229a9c57e76c6. 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/NLF711506847.