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 0x3f3b0c2c9afbc1c2e705ff895f48c72cdb4bb8a0c0f7f1023901032489a3377f. 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/6c225ca6-4d51-48d5-98b0-f19aae5320e2.json and https://artists.proofprofile.net/proofs/artist/6c225ca6-4d51-48d5-98b0-f19aae5320e2.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 0x33d512db59cc2cdd0cec6bcfda7f0e28960aed819236f6b3aa670b92ee4788fe. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AR9UF1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0425b1ebb5ffc0f5d456b5d58bf042d01b709a6d73fcf32910418d99abb5491f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AR9UF1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49ea0b4b9708a1956a1ce40fe821ac611da9b65f05fa9242b7980561c4eacb9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/AR9UF1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc259f733fd8043ee7a53d9d746fad7a5e9a7f946991ba909f900dc1bdb2dda46. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/AR9UF1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210d19e069ede860e4968e92e1c1ac8b5782d713a578e461e82267100bb9ad80. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/AR9UF1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb407abfb6f79f90c49ce6dd1324c7b9b7ea2bd34481075e63d0105690773965. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/AR9UF1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a232529a2785ed886e01ce511ee0454a7db8b991b52a0ebce32c31980416a1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:30:17Z), 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/QZFZ32381871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86c8b0123c8309f8d079660f03e7d56945a7fd18bd1f100ee99620490726cba. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:44Z), 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/QZZ7R2471354.