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 0x906c55a3cb053b1d8e8c4fc939768b3808ccf6877f448e291e3e11c75c3ca9b8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aeeddc94-4e9a-4bfb-8b51-0b46a9bac145.json and https://artists.proofprofile.net/proofs/artist/aeeddc94-4e9a-4bfb-8b51-0b46a9bac145.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 0x89f272ad2ef46bc2040b5af87e79178b212aa0b79e72b2d2cddbbbf8376ad7d7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:32Z), 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/FR10T0907363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7941a86b555f8b94da8a9cc46597a79088464385b47f942873a4b08ac7e0afd7. 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/FR10T0907365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c41db4fdec8e81ed9b6fac964fa2f40825c423a837b317c1cd3feca947b349. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:51:35Z), 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/FR10T0907367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff30389b511763593982c3906e57a88b7676eb23b05391c324db0095c36a15c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR10T0907368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ccfb6b1a89e37c04b7267f0ed053b8f2cba511e6f6b170c4fded5f65e63f77. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR10T0907370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4faf7581e7e1d03ffc3837cb3cbf182af87ada39c5bddae0f27f75600c6bba. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR10T0907371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9332a5f33699a7982889840b6fbdc7350d34d63671aa8d529799062c734b8894. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10T0907376.