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 0x8df7e92536045e343a9824ed732e271e26445f934bb85ec598eabb85c1729695. 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/3eda348d-0d88-4ac2-ae13-efb1cfbe319d.json and https://artists.proofprofile.net/proofs/artist/3eda348d-0d88-4ac2-ae13-efb1cfbe319d.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 0xba3cd1fe629708bcb5895da0856801f41a091bc5c88270da260f6d8a5827189e. 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/FRX452428105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fb0310a3d604e370afe3dca34273bf3dd09e10082facf53e80114a6b3d6cb6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:01Z), 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/CH7812412998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dc9e01b17f3c314820cb2a81550681897fcd5afb6ca3fda3eb8df6c8253606. 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/DGA062426525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71623918ab1baf3743ae73716bb904e22a28c24bec1e0c16c03408815586397f. 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/FR96X2426188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1222e1ef1fc1d226cec14f0c697775e916c544f5d4ebc9f323b4784a682bc60. 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/CH7812403623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ce935ce3a0ae2f890d89dde384089776dadb1de6f4d40a1f5e204883fcd141. 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/DEH742421719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98fc4e359621859756acf688c2400681b5dd76fff1177e3e57650e3ee8fa7d0. 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/CH7812363011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62b74d927b69f9007879a8b933df77442b51f7c9961e7d1bad1187d3d224c6f. 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/QMANG2234311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c50b650f1b380536df3e90e2df02d57c96048e487e4260baff8637749eae3fb. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QMANG2222732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8180d1fa905e6f0f445c3e18e7c5413a1f1d53a06a63fcd2db16b483806d04. 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/QM3DF2278892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a1e19dc631c1ac50e44e769fcbe7fee44da9319a6942f893c456e79b38f6f5. 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/USANG2296663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4207112717a1728d9267370e01e899e3d91406658918f6059d1c72661e4a118d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:14:52Z), 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/USANG2293639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9bd4c7710a84c9fed740e8370ef08ff2e654c2e77379378bd1035192cf7657. 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/US3DF2553138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f4de631f9c1990fa5bc621a9bcb06da1a4eaad38e7faf633aa23105842604. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEH742434933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ede4a1f1befbe2d7ee7ff31173cb8b7c0ccb135e29b996dc4286450858826ac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:10:59Z), 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/DEH742431753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd29021adafdad9f22ca98146c53adfcbf4a8247d6d59bbfa512e754071c515. 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/QM3DF2128471.