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 0xe52cf7427d2d7680367f76a49a640689085c88ac31e86be626792bed4b4061e6. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0c2b52d-0bb6-4df4-9bef-25ad3d589198.json and https://artists.proofprofile.net/proofs/artist/c0c2b52d-0bb6-4df4-9bef-25ad3d589198.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 0x4ee23bc98e339fd59f80daa23e03669240ac0a5a6711c2fccf6c488cad7bc844. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUMEV2389244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9859ece009e4a9a53868d016183380e5de65eaaa4a7b73e5ce84b40721dc56ff. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:18:15Z), 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/AUGBT2349831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2060457c333f82548f956c62e1c2db4b567af3f4fa91125f44b6ecee9c2326e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/AUGBT2416366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b96ca3641d7fe474a230fffe853484cdc4b8f0475500db8ddf38ae50cc125bb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:30Z), 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/AUMEV2509642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26be9ada434ddededf899ce2608ec6767eefbab965ae26ec55148fb144b01bee. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/AUGBT2538329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6836fc9392200705e3fb7e15fed0ba750a49efe75b1f6d9608e44cc4586c6f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUMEV2259455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a54b72c956d8e2bc5031c73bafb423fca665098761a725b66b50a4efd607759. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:25:19Z), 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/AUMEV2362799.
Florecilla Recordings Vol.5 (Guitar Duets)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74a5ec4fd9b83c61dc0b2e8f4c747bcb4de3551dad5fa77f42472ea39c6a84a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AUMEV2458887.