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 0xf8b42741e2fb546ab425bfb867b040bccc9f86820a5ff26885bd9f4995931003. 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/ee6b27e7-0fc1-4e3a-9350-f7c43bb4dbee.json and https://artists.proofprofile.net/proofs/artist/ee6b27e7-0fc1-4e3a-9350-f7c43bb4dbee.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 0x3fd002552f4f663ee8a31c930cde070c8814ee57e2c99f7020ca56a65f2991b0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE6N62202885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348dab08ac4e685c6372d2c3e6e73b1418a338a731f611138096d103ea97ed4d. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:28:01Z), 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/SE6N62202886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008b023d5d2b9b055aa576f7cf8595edc81fcd2883e2bdb28a96868ee639f7c2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:54:53Z), 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/SE6N62202887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afb556e2c01ad077679126bef3b51121219a232fd915227c75fd834db1f0566. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/SE6N62202888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41c9e688f7c221bcde44e3f662ed5e69da7e33f4c11014947d9715b168dd6e2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:52:19Z), 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/SE6N62203314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712a48f369524dc463f8ecd70e588b850902045b912f9a51941f7028066dd018. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/SE6N62203315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536956fdfcc137437eeb9e02a8c2c97fea2d08435ff0fc4a5dccd9f6fedf0851. 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/SE6N62203829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de0c08a978abe16cb17653f44c5c7508ebc031e8afb056a8e6bda4bcd14e8ef. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE6N62204802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b0d72e8621997a4bbc651af40490a02def6e916a809fcc9343c842c0597126. 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/SE6N62205163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656523c0ffafe4f85b39f09d218099fbaf40c2417e61d2397e0fc17a54fc1c4c. 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/SE6N62205587.