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 0x0b89b7ed9a43563c8a9fd5936787f3c088c3c56e6b39605e705ec81ab26637e6. 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/5d8ee7a2-8022-41f4-822e-b10fc7b47e24.json and https://artists.proofprofile.net/proofs/artist/5d8ee7a2-8022-41f4-822e-b10fc7b47e24.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 0xff03591384616437cb869c08988a3017387fbcb596afa7cbabdf64886d2d3db3. 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/USDY42434207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4cf28943d19bcb2e1c635d645c63009db5979ed6de26aa35032ad5a2ae4fb9. 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/TCAHW2471220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75382bef36e51399809ade58b543de9bb47b9732e0b54f56d3365c8e667b7ca3. 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/USCGJ2474713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b5af9f721f3bbd3b3ae06c602e1c19c3ef0b68e9859f9fb9e63d1e2230f929. 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/TCAID2434665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ef2d23e0eed037d62b652ce07ddb53a5764a5b2f14194343476d0f500a7c0d. 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/FRX872466289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41a6c08a8ae43559bbd574136a8875bc6901038da0e9666ed625141c355f186. 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/US3DF2457771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0883082daa309f496b7bcadc0a8348a9a0561eef05935431d07268c218f609b8. 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/QZW9L2445943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883869f66112b92838d664ac16121016d4fc9c9f2a37dd3b9ef7fdc1a858b1a3. 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/QZTVM2482783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403e7d47edf6f04a74c4501728f3c3a6656ed2939fde8960c5b282e83f653433. 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/TCAIP2478755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693825cc4d061b12d582e0bb181d9551df7187ad80cb975c1ae805510d948e6d. 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/USANG2425340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97415168cb9df23b1fb23d18ca6c9ef00f5d6fc64062f0113dba91b4b15d1c7b. 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/USANG2428679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb085541d06a4973f5e3247ecd1201159f9a262b4726b6d22687d3dd6b20d68. 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/US3DF2550410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c58e375f166f0b37f42db5795fc59dcf3974073cfb44f6960296466646118e. 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/QT2HF2400363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86bc7c6aaa64206e9b349622ffa54290c6161fc6f56fd0a8da336be3776324e. 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/QT2HF2400364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705f177cffb71caa5870a6c7d0027a301ef2b4d63e416421aa7601c3ba82ba44. 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/QT2HF2400365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1431b6cba5b8fff080bce0130eb86d252f2c639abd434bce5ea0a2e1ff43c19. 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/QT2HF2400366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f49d607f23d901b82d48cf8d5e1732663688f0d2b46832bd65c3c448d80ca18. 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/QT2HF2400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae1b92f774903e87f2d573700453665144ee4fe97127258e8548756f38ccec9. 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/QT2HF2400368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834b088f68dc7ee0882ff8af5f40db3c14751448eafa27b7714959a012112ca7. 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/QT2HF2400369.