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 0x5be1c1e9dfe3f73fc5db5d9fdd8c1bebe330f41009ca468b5104c80e60dd08f8. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31295743-e3d4-4542-b410-719ebd974573.json and https://artists.proofprofile.net/proofs/artist/31295743-e3d4-4542-b410-719ebd974573.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 0x8da4fd74b6e35e8099bab60ff9c40521a622b69b4fdd02e4f3cfff67728a31cb. 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/USA560823177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1388b6acba8d604719b22af6b64e8d3ad125d3e4f1256e6da6c4b382158ba7. 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/USA560823179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfc28081bde772fb4c1d1387aad4cca41dbcc0a7f7de1f694ffb66230860ca9. 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/USA560823180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcfbefa67700860de61d3632e70700da181ebc8da2904f8f427a4a18784bed5. 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/USA560823181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0fcaf17d068ec3472f41b27b9b0d59776532ce300b4d6e387b61b3e7afcdc4. 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/USA560823182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa909e50fca3ee35b59ad78350d52624b569a6110af2a91570fe8d5c07ea73ea7. 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/USA560823185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3becd9a8c990aa3185858e237085147cce548c274b089b6ec710d3894a8637. 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/USA560823190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a74b4e61cc86b94add8ba9e9561158b39797776a7a6bc28671649962ba87e60. 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/TCADR1881123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85137433527dcd3608271c72cacd00b3e727d2fd94831f95de2005c7f4581c85. 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/TCADZ1880247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f20830750314f44e7db0c3321fd3a30e351cfd3a9b4a178c04c8673ed6a39d0. 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/TCADZ1880249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594b47e451ae62c1dbf15f7cc3cc3f0a1ba738ff9f20e055f8c47db82a160cad. 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/TCADZ1880250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2986544612eedb40c4f59560556bfb094bef937da4f9729b8f2cc20b522d31a. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/TCADZ1880267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf4bc0cacf46701d3346fb476c2535bf74eeab551917cc9169fb2b96be81e48. 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/TCADZ1880283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0c24fc9e5e861c6a14c09d0d058da70adfb3b838c4900f716b73d94950934b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCADZ1880285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89afcd23b5f76c76d5e608f837629fc5e5bcfc72a958234bf5643ed20bc9a5ab. 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/TCADZ1880286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a1aa3d301d6a64f1793be60191b1e6277fd603bfc337b5ae36f1aa63c96254. 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/TCADZ1880289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5238c488d2c78d00f169067ba55303f24b2f9af299e6b1efbd761386eac499c8. 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/TCADZ1880290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a93df30932a3c7f088ff8128cfa1d502cf8ebefc961fa529a7cb34278dc205. 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/TCADZ1880294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc5e0fea771f91d6bd377a2095482eaff23ffda11f7ca9ab4544f8b16121cc0. 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/TCADZ1880295.
The Best Underground Hip Hop from New York City and Beyond
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e10615c7a99f4ed995e374e630cea4dd4bc3595d73d1cced3db9df52fa34d8. 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/US7HE0510013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff416ac650c8e253f67ead191cc201138dc7dd08d44c357b3ede8b5435dff8e. 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/USA560902130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bfc83c1d9cb98894136d041beb7a7ba72529d3f0436d1f43b00f98416e188c. 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/USA371062113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2840c40e848f1b3914b5f63d7decc578ad47e319458abd7cbca2b14b87f54d. 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/US7HE0500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13129a3b56ad537b4af78a32b5c1ee085761640186e4288eeed64ff42cbc4adb. 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/USUYG1009213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc4b3ed8682a92f9c4bf404559afe19e2265299034866139fd3bf841c8db09a. 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/USUYG1009268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ae34fed9afee93d66c37fcdb9884ed9420977493a4f36241deed8e20963966. 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/USCGJ1784623.
From the Left (10th Anniversary Re-Master)