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 0xc061a407e419540627caa56bfba667f672066887e5be53fffd0b432cf264d4d4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48d92efd-8f59-4791-bbe5-872de216d4e7.json and https://artists.proofprofile.net/proofs/artist/48d92efd-8f59-4791-bbe5-872de216d4e7.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 0x1fe7b6bdefe2907a637ff95e57acf29e0a753ddd1ba1e345be166be9a10f0b4a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:41:30Z), 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/PYC842500339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4407ef6018b9ab0ac3ed50b3555636838fca6bc7046d6ae10805cffd651cd90c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:46:45Z), 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/QZN882074533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8e1eb7913977da38b41d3ded9035e88b63028cca6f83604fd78bdc9bcf82cd. 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/QZN882074535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8cbcadd6ad4233ed0bd3a803acf583fb569fef17f33cb469621b946da17aa5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZN882074536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa12e53acafc098131224a25051efa837c9ecfb58fb1a70d6a16c8fe8c64d9b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZN882074537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82c34530a088ab697e5fd266f19d6f04d2f11fc6b419af314803f6d34fbf813. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:57:14Z), 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/QZN882074538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775513b6dd186832c20cda186f673dc9e3965e93785a946959e3e9670de44f70. 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/QZN882074540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b90a2b898a9f9f523d51d017ec83988db0b091f7e6f7b234196295f80b8c40b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MXD782203529.