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 0xaa039d4b38e2d201b1b39d2429443018526481c00c816be94f3a1ddf3c9ba289. 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/512f342b-6345-4fa7-988c-4001a4bef5e3.json and https://artists.proofprofile.net/proofs/artist/512f342b-6345-4fa7-988c-4001a4bef5e3.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 0xc4d603d366f0e4f86563ad40e1235998c4baaa9769eff74c4d206f049a7c29c3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:35Z), 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/BR20L1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb96c2b1a3a2a2a6b28cbd6c9e025a9a668d8a5df43e247ae390b86271f8ac5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BR20L1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304169f0dfc39c447a0490592bf02c8a01e3960898cba07d803a8b1e976834a7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BR20L1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773f37b9b415b76df43382b9d7af1975ad4fdf20c3f4030a8358c3ff622b3285. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BR20L1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6709d5e0671e980f7ede33ea8dc5813fe64ac0cec26cb3e65903a1ebe52c2ff. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:54:07Z), 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/BR20L1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f575596c4ae099f92efff1f7d40f81889686d1c4052786a23edcfa2bc262d7c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BR2791900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e42d74b42d857e9ab7acd7d6638eb42bd4eb5bf1fbe99dcbc6665ebd8fa08d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BR20L2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9433f1f04769e61cca5bf54080e74d71ef1a65300adc7d1f0784bd435b6daa67. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BR20L2300002.