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 0x71d64b9482c974d77d9e52730dac7fab7d10582b61aad63a76ec67a558bc0247. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b2676d3-6516-4533-85dc-ff3680c2a7bb.json and https://artists.proofprofile.net/proofs/artist/5b2676d3-6516-4533-85dc-ff3680c2a7bb.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 0xea316b64b6e11eac9a3e1949891a234cde869fcbd88210abaa882c385ab24707. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USC4R2441359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485aa8691d7655a2777227b7901c6942b2bb64843f750f7cddccb8540f4af75c. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USC4R2339483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dc2facb78b824dfe8b6d7bd86d7beb22c41e7bbacfbf7d7991555c0a1b6525. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/USC4R2441362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493e8f6b0b47023d3490f2f856d3638ad1975f60e3bd44866c7d813e310fa898. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USC4R2441364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fc40572a04e35930773da04ce338b5a380c8e5ab87f52c8afc35013c866408. 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/USC4R2441366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0439897cd5d5817bbbba583cd9fc2b123dbfafd6dd7cc41a14b892c17f1969. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:02:04Z), 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/USC4R2553508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5363b22756437b0a1be8d65a1083304584627a7b25477d63f69b9e87cb6ed4dd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USC4R2336919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea316b64b6e11eac9a3e1949891a234cde869fcbd88210abaa882c385ab24707. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:38:55Z), 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/USC4R2441359.