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 0xa5bc715a3fea7d513ca398e8e21ae7387cd7db598ef6a1d2c2abdd0027309a02. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15b79265-d9c0-4fa2-bbe9-1d40e09e9ecc.json and https://artists.proofprofile.net/proofs/artist/15b79265-d9c0-4fa2-bbe9-1d40e09e9ecc.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 0xb6f3ea75e8c703fc6e7c47d0341f829dc6348cf0ad6534e61387b15b827faa62. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FID8M2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03c31813bbf78e0054760871dfb9951d99583e7a078e59dba760605fc926e53. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FID8M2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b46e148b7853f645b62c36f7004af923f32dfca488c820b7dccd9e5b739fec1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FID8M2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c5c2ffde0c0cc54094a208ba82cbf2b2f01c04bf4d596c743e0eafc88de521. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:11Z), 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/FID8M2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4665114b57ebfda35a5199bba53df6b14aabc6b2060a6a321309442a60faac94. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FID8M2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2e674ab59a6234ce5f760faec84c6a0538296f2eb094582a21a213362b5d65. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FID8M2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6fe493efea596a3c29b1a3d06b60eba3de0f6223dd21f997ff1db7006676e4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:19:28Z), 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/FID8M2400027.