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 0x52fdc62f4e42fca82e1f87c929df2a3bbc7efb1cd88a59d3dacf7b3eca519224. 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/5a5082ee-f5c9-4b6a-b7a9-24c163b14b51.json and https://artists.proofprofile.net/proofs/artist/5a5082ee-f5c9-4b6a-b7a9-24c163b14b51.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 0x12fa04e7c3d0e9cde42ad9662ce85ebe00900267e5a57985f7a4c6012f9c0eb0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA61807994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1fc1b9a420459f51d51bf67e80f0b45864a27f233bc88a8cc6af594c1cba9a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:06Z), 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/QMDA61807997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8429fdc36d017f58ebd5b1c6a63f762e6c36df347c614862c44fe70d26662b98. 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/QMDA61807998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8f6c23051e3e1fa44d01fee476157ff94b365076724ad34f9600ab14a9ca44. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:04:30Z), 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/QMDA61807999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9723317bd38168db68a341a6f0d2e5cc2b881d61294278fca04945f8aa94e556. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:01:15Z), 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/ES31E2301694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad44a26230e58330e93e1105c78143b41c5525078880d2204390e6ecae1bc7a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ES31E2102465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dfda1835571d16a6bea26a68084627fde93abf08316151012619449ad27905. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES31E2204630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d92ab2db5586d51bceb4cd69c575012a060e05b54555c9e7654175c0e6585ff. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES31E2100527.