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 0xcb801baafb1d3de3fe7b87d5928d52379f891aa139afe4367f155014ed85de2f. 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/06c94fa9-f542-48f2-9158-0e78fc54e40a.json and https://artists.proofprofile.net/proofs/artist/06c94fa9-f542-48f2-9158-0e78fc54e40a.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 0x1258140e46f25c5456813101d59f5c2473bbc48fb11ed7b2375785410c797102. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6L2319082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacda92600e02e85b6c821325a1088f5d6e8b84cb76c208e90131ff6d48aa257. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6L2319078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd555aacc7297f83c63c9ec0bb0a5d75781ab08dc3f29c679a5fe3be90edd6d26. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEN2337137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f31583031e89b6e0334a199c7e7aea842ab0d50e03f3b43fde9ee09d01e788. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZTAT2381164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cbadec50ea3987a874a155042897d97e092a0982891231f170bda5cfdbf942. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:51:08Z), 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/QZK6F2423168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40101ff8c9eeaca52179d9f70a00d2b260bca7c60931cd90273b9ea6514a0327. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZRP52403959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72fb96f197aac3d8fd08d69831ad34e27afcb5d1178c7e3bd0c33a92eb574ff. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:03:02Z), 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/QT3F72555378.