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 0xa74c2cb5ef571fe93c2f972c1d6bbf4628c19a0919c96b646c6616e83098542f. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32b264be-11ee-427b-8f71-16dd9e1e1872.json and https://artists.proofprofile.net/proofs/artist/32b264be-11ee-427b-8f71-16dd9e1e1872.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 0xacbb2216e7d7e9e7a676ac745e129bb3421817380e44f5798d55b983b36c4bc7. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:42Z), 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/SE6TI2358011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb887998caace9a2eb3f60eb17d54ce8531511491a61b488e4b206d4478fc9579. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE6TI2352554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968b8bcbc2b2eb9bbddb637e76199514ad224cde2f2ba1cc6daefdf06a8171fd. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/SE6XY2332988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e216155495570734706f0e5c9fea0b81336e050959e598b1b336c3e4d92e1f. 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/SE6SA2316015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056c9df05cc9432bc1f3cc68e07d9514161be671804543d653648419a80ebd56. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/SE62M2354042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8046d52d6d1e81cbd39b7f6674b23c5769914e71615eb78db08b015edeba153c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:56:55Z), 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/SE62M2318639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538f3583426474e7389471c59f283ec6c68502f54aa0b2acf3c49a355c08d2c6. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:11:34Z), 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/SE6XX2525908.