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 0xe7b8bd8ec7126b4486deab82971e968d9993f83940a76844a9cba46a06135ea9. 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/912011f8-addd-4859-a167-fec7beb51cd5.json and https://artists.proofprofile.net/proofs/artist/912011f8-addd-4859-a167-fec7beb51cd5.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 0xc39ff85867d7d9eae9347cb7457ea317fb46ecac5b287575a556769f4a739e19. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/USHM92077286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc97abcb680a38acd2ef12ea49b9472511b1492c2e6162a3643e8e7f0d0ed879. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/USHM92077292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4d44528b5caf931a5837978b258af19d442ab8c2f772fdb3c6710e0302f488. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM92077297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f1a244259ea358d59407474d8c844e6bc72a3d1122512b902cea15f5c2042d. 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/USHM92077302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4a19a959e3f920914127d722ee275b277fe1a0020e65af253d0987d3027603. 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/USHM92111003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd640a8dbe046fb06450931a8c9bc189f5c78313230a28a61e4c01b40af958586. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARG292300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699d3e984d539d8c3241a4d9dff4397d9f18a6747a8f75c42c6a5b91f82785c4. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ARG292300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e24ce26e6aacab98fa9d01435845b3009eddb9b3166fae8e95784c195f02b9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ARG292300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca419b12f0108a304a485647079fd8abd626c50efd07acb94a55c6c01ac676d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:36:22Z), 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/ARG292300139.