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 0x07c26fa25925421975b90ab565eafbd9089723d6e2d7fb5dbdb43c9c9fee6a75. 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/5d567e37-ee09-4339-83ff-2fbfe85667cb.json and https://artists.proofprofile.net/proofs/artist/5d567e37-ee09-4339-83ff-2fbfe85667cb.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 0x7902a2b5bb53c59fc52763c79b094d49fd3ee56334494086cd2d0dd3b07d665a. 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/CA6D22400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fd96751369944af66d4c64c6b7258a3e85f2c4b434cbe019ce19bf27636704. 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/CA5KR2437475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf005fb8671cbbe7900c39083501aac7bcab352fe442a84fed196a7e207f3981a. 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/CA5KR2415280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c00e7721903379778a0df55ce11d5e53bde91d71d05081d13fd1a71bce9cdf. 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/GX4Y82300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd87fc8588ba95e4e6c06b8939216b5d2b3670ac2cfd33a45905b18cdf64481. 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/QZWDE2313320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8b73a2d50c775bec3ff5ff37f6df65bcd40da0c3355a1d066d7e1ad12caeec. 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/CA5KR2363172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38619948f01865d5e7cab1f5587dd126b1f9a1bc91df7f9f92a5eaa756c190d6. 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/CA5KR2365703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9d99f88ab1f934d258a01838e484aaf8ed9cdd72c8e7c85c77ae201e3a8b01. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:53:05Z), 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/CA5KR2365704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b653f97dc74aed99bee2c1b02444fba0564c801d08f255d5bbfafc5fbda9709. 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/CA5KR2365705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131e525c57eed9c7dcb4e56e65401611d216dd1892cb7c4ed3be4b79f4950faa. 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/CA5KR2365706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582a2dc29de3f38456776d42986cc2c1438d1ef27c9d8d4f0855fee40878918c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:38:44Z), 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/CA5KR2343397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5a010cbd8bc9de05a26b122160880252d62a8946cd4d62514a1d2fbe4ea138. 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/USLZJ2367376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0082a563d97f6aeb57ecfb09d60cbe041819562033cd77ab43de027674e04a1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:45:07Z), 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/QM24S2202861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded8c6c465de86da97374fb2a9a1248d4986415ad5a394ad2b388e662de9cb96. 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/BEN582100888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834b894bde9e7776e2299ffcf56432a5a9907b0c652f0446184df8cecb7e22f7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2160472.