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 0xb1807690047f154213256814ce265ae1677e20e06465de3b4611a53f933eed74. 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/6125877c-26e9-4a9d-9965-08772b36b3a2.json and https://artists.proofprofile.net/proofs/artist/6125877c-26e9-4a9d-9965-08772b36b3a2.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 0xb19031bb749eb6aa7e294f958dfe743a70589d58bbddc390978cdc46c3dd6350. 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/DEXN82448731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bbed101cf99e7641304cfe335688c786f462ef8d7a96fefb992f2960afaa09. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEWO71700682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d3095e89e3545001993e1e2f111228c31a4bc16375f57fb525927a75347655. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEWO71700651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9a85ee21fa6b4d53ebfad016968ac7140227189e125be58eeb691128c5a457. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEWO71700634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726afbb5edd09204a0c35cc8cce99a46585ca6189a91050934f2a2780bd239b2. 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/CH7812363101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5625ffa86d9a1a4de5d8b93c888a293db6f0eeeb7d8166da81acf28b11a51475. 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/DEWO71700627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eb1e70ff0ccf873dbd3ae06fe44de6a6f76e736c9487c5bdaf8edea4a41ded. 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/DEWO71700618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458e27867b48b922d818fd28d8107a7b00322fe7480d04a9bec4bb6a5ffbad26. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEWO71700616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31369e69e13b8e3c0b3af327d5a6129313d0243bd8164be34bf46956ae39405e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEWO71700597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ad3951fad2a794056e185036937409d762ef13582df3f4a88578e81ed89dbe. 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/DEWO71700574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed88ccd6977a3228b951f204a697ce324ae9971592464bd6a047b7f5cf12cd8e. 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/DEWO71700561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0924a4eb088daef451c4025a4ab43a09392b1f46b73b02f3c9e43d4b51e3dad. 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/DEWO71700550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a4ed72ca657776e1a9150bc546fd184288d6473188986208fd5c58d6df351a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEWO71700507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1cc219855582bd92b4b46fae26037b763748db66e2aeb243d1dc63e8fd97bf. 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/NLRD52419125.