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 0x9e6131786adc15610e4c55f8ef55b0b3930a3887ecafcdce35dcf69639893d5b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a204b34-ad0c-4aff-80de-c557138eeb28.json and https://artists.proofprofile.net/proofs/artist/4a204b34-ad0c-4aff-80de-c557138eeb28.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 0xfd619ec24275c0390ab8a592ac6c343ce7978560447273afda0263ff85b12b44. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ESA081901657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6262f4ed23a471255484e44c7dafea6d06baefb1d348140e9ed4935a9d6332. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ESA081901658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ebc7b8ac06e89ca26c0d50460fe4e93e473ab108be514176653aa7b06f163b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:43Z), 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/ESA081901659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76b4fad23ef906b5143ee1a8d646c86e280b21fccb6f8c8b7cc9494e7296377. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ESA081901662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec56024e10c88f1d807d901dfacf3b75e289dd1abc0ecf4de41b4dbb54dc267. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ESA081901664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78684b21f6c69523fed3bfe953b6068bd90254a139d27202cf84dfe0dd29312e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:56:09Z), 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/ESA081901666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41210f8609ff4c0c1186b157e775d8dd166d50be00ffe2e18b01789ed9a92263. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:05:03Z), 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/ESA081901667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df7e4f4098541c4aba12bab5cffd8b7aac354d65edcb5e621639f5a50b9a887. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ESA081901668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c61200c23c6b2c4e2f7fbc45ed430460d0276bb81c098bf564d7b320755c82. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ESA082000376.