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 0xd1f9a8b4f57adc4238e4e04830c0d059c1be1101d6438d5be660fbb93c415c3b. 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/2fe46567-2096-4830-9cae-81448a241aa2.json and https://artists.proofprofile.net/proofs/artist/2fe46567-2096-4830-9cae-81448a241aa2.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 0x01d998173b98d7a1f02d8dfe9332fcdb4b1652ebb5fead802993410c7902d487. 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/US7VG2228727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af147874e9f6b0804c75381d789372c1c1bf89cda114979ec7f413fa2039038. 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/US7VG2228829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d998173b98d7a1f02d8dfe9332fcdb4b1652ebb5fead802993410c7902d487. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US7VG2228727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6943b51a376f97cf6a2779090eecd128d192974d723d19dc4b3c504990d41969. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/USA2P2325397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c497d9132812c2b2bb7af0d8bc6caa6d0aed4b6b07a4b38d6e391bd8175c78. 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/BK4DA2307747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ace7206035788bb71b43e043585e4a5026dce8003dcd62bec2756990a41ac66. 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/BK4DA2307748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ac80eaee09124f14ca3429ef08ca66d2b029f1672ca9e4667bed63c0d5e0b9. 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/BK4DA2307749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8c99c73be6d0cffa97b9322721eb040676503bdec00810196da680d1fcb308. 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/BK4DA2307562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ac80eaee09124f14ca3429ef08ca66d2b029f1672ca9e4667bed63c0d5e0b9. 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/BK4DA2307749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b4f7c2f09c0df1cbc146e619c6449f48b6028711584c28f35403aa094d117b. 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/BK4DA2306123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbd1f794e074fd77ddf5e755c4e15df4ce0d81a412ac29f7930348c720606f9. 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/QZ93L2202993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a88b6f21ecf48e4543c17d139b8389b7d0a324960ebc66fe2e5ca4a96e0db45. 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/BK4DA2402858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462e288ce330780015cd7d3e47f8d67a19966340f975c3ec551447ce9ea02764. 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/BK4DA2314125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf95740a685339f73af0bf3e5cbe949c99719bf32613385ea4fb1739bdc9e326. 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/ZZOPM2231522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe557dd7e36544cfd32e0b4e3dbac0fc21a7571915f8d1251d28825d5d4d7e22. 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/BK4DA2426805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99de0589a7a251dbb662a849aa1235603da1399f104ecdecb764a0dbeb3f3a27. 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/ESA011842695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e03ee4d2b8374a5f3bbd47c6386db96de51f78792c97bda641df1cd2958619. 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/US7VG2163810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d1485e1a09dc8fc7fbaa715aee656625b3a81a656714c958e04b18c4afcf2c. 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/QZNJW2325389.