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 0x8c8d72a9966d856fb49203f81f3458ec0864c557111b1c91aa2ef1ccb5516d94. 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/33ef104f-472e-43df-b3db-b4a5faf819be.json and https://artists.proofprofile.net/proofs/artist/33ef104f-472e-43df-b3db-b4a5faf819be.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 0xe2d0686593c89f75ab37e3f1e4335673cb5aad690cfe05a0796644cbc34d936e. 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/SEUM72201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24b7ccc5e567c5bc219a7f72249af30465449243207c7617a43ba28867d383f. 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/SEUM72300967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa507555e756f6dc632ea95f13d949b8cfa8daf61fa03d6ff0fe40a0dfca94f0a. 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/SEUM72300781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e729fdc0f322cedb29ed190dda8fdc0981bf64e8f3aaa7fac4ca61a3c4c955. 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/SEUM72300968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0377b4fdd29547d8f25194fb5e4f4394cb9f00e6f37e50382affa99db6b1191c. 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/SEUM72300476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fc34a150827e16bb6dda16a2bc926fbdbc5382052eb90ec4dc7d10111f1c50. 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/SEWAW2100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839df84472b2d21547a7a7f1c9447b74a0efdd8d9d459203300701d8a3225531. 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/QM7282495773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac0faa6cb8f7ce105b8e3f97e9dfe8d91985bda5bb3dad7ec916ffedce92ca3. 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/QM7282495774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc1b3a1904bf3c6dc5efb01022cb0c6c90c8cae24b327d08266c840eac7486a. 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/QM7282495776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b75656b6d2867d37a8110e11bfa1cc12695c550a9037d46e202de53cd735cb6. 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/QM7282495777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a2f900d4634052974cd2b35ad4080d5117dea22be3012eebc380784286fed7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM7282495779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed549c8f8e5036be0d632e75c865a95dcee03ed215226e34de66e74136d6829. 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/QM4TW2558101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3ab55a45e948aaa8a6523c45d4f87746fe89bec84767c7486c9d48d1f0d699. 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/QM4TW2558121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466b5afa2824cb1162c7f6641473501aa34c53be70acd7507b1a13eb6374e1e6. 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/QM6N22434190.