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 0xdfd3a479909e77bef29ea94fb4ecd97b1b18e030bce7f33a4ebb4be1dbcfdc79. 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/2cd33957-9aa0-4f03-8cea-69619e8ae8fc.json and https://artists.proofprofile.net/proofs/artist/2cd33957-9aa0-4f03-8cea-69619e8ae8fc.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 0x8aea5f06438e139850138600b6843c85b65e1fa9b6b67cb13cc0553d3db2dffe. 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/USQX92100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c0f1dd33b9937193185e2aaa2460cd55b836240ec0b0e45cc8150c83372918. 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/USA2P2251192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42358ff140c8b55574d2b2ea3a29470cedfa76f9b71670b67d535b2df1f7c652. 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/USUM72218959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5763e56f72b2ae1c36035e3d17862eb916a3f22e6f522d79898e944ba212c2. 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/USUM72219018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a0f4d2b77bf1a491210001688d65eb2d373ae98d5fe6163a6bf176d8da906a. 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/USUM72218983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4347b4c2210285f62758fac2c07852c9d2834ed9271e36062546c970b6ce1d. 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/USUM72218915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bed4100b87e5be1c1e89a0ac7039988ebe9ed0334ef1f43770cbbb3815da78. 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/USUM72218923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9e225d81a9bf40b29d9879e3d14fce6aaeec2ef601e620db9f881ddc19fc4e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM72218943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b0b052f2ae1e875c0fd7d26cd977a602c516f96d2c1cd18b3a41a41acb0d71. 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/USUM72218953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b797c3c779be198ed0818b4de8a85e4b88718262afa1879507d3a238325dc97. 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/USUM72218930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad2c50c6267164604f78fbb750c1358a7172b58a7431f4f68bed0ac1f01a587. 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/USUM72218940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37c387e0c8cf7b48dc6f5fc4bf76877bd1d09bf0481dc67971a951cb3560213. 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/USUM72218927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f5e94a9dd6f4dd8fdc073859e453d9f4009fc695243c43a2903f97830565f3. 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/USUM72107994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104ef0d7719fb0254909d4e2d96fc34de1c23495f5a06718ff774f3b6a7b0a6b. 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/USUM72107992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8910c2e63b60429f7401a5474e5dc1866651db813c407601108cb7e684e2c2. 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/USUM72107993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d6cc84123b999f9913d33dae22202ef2b88018eec895b21f8161434136da44. 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/USUM72107997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7348c07e88810249f214945aa454f27948e1e87b7f77e14a4e41a9ddf619e65. 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/USUM72107531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf459cff5506a3d5c35fce0b04045ff9a9a3f9a2f253df55800bcab0f6a972114. 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/CA5KR2032133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021438f2ef6677a652e68600a6bce5e89f7a38ca9dfaecc098e3e1968b8f9402. 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/CA5KR2032134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09ff6af51828c81fedf9cba0096056d0457f73ecaf6e7bb48dc92e7b8aff056. 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/CA5KR2032139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3180f45b6d05bea5974adb55bd99acd18c2b4c590f8bb6545faf8c8d3d73cc. 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/CA5KR2403151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4783e4a8426d3e3f062ab1503181cafad08375b4bf7ad1bfcbaa9be92edfce2a. 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/CA5KR2382238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ab1e1130a4ea5a9060c0b374ea079ecb200090468453526f36c5984e6f70a8. 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/CA5KR2363591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6336e35efe548b7e1cfd11827e0b2f2b26c2d1fa6a91515cac69a770cb5bfcc1. 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/CA5KR2356749.
100k Cypher 2 (with FCG Heem, Slatt Zy, Ar'mon & Trey, YNW Melly)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7348c07e88810249f214945aa454f27948e1e87b7f77e14a4e41a9ddf619e65. 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/USUM72107531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fea675134ddd3a99c9d79d230c43e63a18cc43ebdcaaad4e69b6fcfff51f77c. 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/CA5KR2070479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5209c93069ec587f07cf4a5adf69178b0e41d5436009c7971cd9ceda3aaa2472. 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/CA5KR2067952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e81e5020b91d8f1d16ea78c47cb333a1f82aac1515262b6f6d2c07fc1bb19a2. 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/CA5KR2442310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541798e26e9cc12893f09c84d43c5546305d3cb12f2039a8fbe9ca07dd308c30. 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/CA5KR2432237.