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 0x1c45f3cf338fb7ea34f3978549969443972e0604d61974e84bf9aa6993f00afc. 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/583d4ade-48b6-4f08-98a5-eaa4e49e686f.json and https://artists.proofprofile.net/proofs/artist/583d4ade-48b6-4f08-98a5-eaa4e49e686f.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 0xc4bbf45b05ced8e3e2b7569dda9cf1699a3ae7a88126f8529d84a8c8fd4c2cd7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITLGE2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d36e4bd8161e6a5dfb03e081bb9c52fb2916d248b4865e55740b4773cb53c44. 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/ITLGE2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db3c34c4d3306ad19a3afc07261503db1aae20496afcf1d8c7ad67509814643. 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/ITLGE2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484cbd4fa76d96512395c33de18eb7b26a8e0f735dfe502e1345578b1b7db934. 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/ITLGE2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3469d48e23dba2d4b6aed111f29f85eb34cc8f0cb9af56933e8210fab87266. 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/ITLGE2200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f5c2e2a3aa593be8d5bb3682906f2c170ddf8af18f0ed02b713ef74bc08705. 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/ITLGE2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4ce5963ef3e2241a52e3d83974249022393e98b2eabdf9fcd6eab97e32c77c. 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/ITLGE2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b0d0f7067f8ef253a25508a9cf5eadb2cc2715fd82563116af542a8a6f4ff5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITLGE2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f145b4db5c4b533664d15e17cb91c7b50e3a80fbb9c7c827f57353ba26162a7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITLGE2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bbf45b05ced8e3e2b7569dda9cf1699a3ae7a88126f8529d84a8c8fd4c2cd7. 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/ITLGE2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c26060519e7459e34445be7d495a9f4f475a8a48553d1040db1c537bfc8fa3c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITLGE2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3469d48e23dba2d4b6aed111f29f85eb34cc8f0cb9af56933e8210fab87266. 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/ITLGE2200087.