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 0xb1b8ab13bf9f916c5e17e94a8ae093a3b2b98af950fd29f5154be334d191470f. Chain 2 (Bitcoin): anchored in block 953681 (2026-06-14T19:31:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/647b8fff-26db-45b2-a859-6d1e72bef179.json and https://artists.proofprofile.net/proofs/artist/647b8fff-26db-45b2-a859-6d1e72bef179.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 0x5b122c8dcbdeaab16f128e6ec544fb96a4b15476dec4090be5947cfe04258291. 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/QZHN82205149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc74390634eb9ea76ca0f9020debbd47023f25f62d30ee99390a850544a3679. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:18:29Z), 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/QZNWV2291506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ade71c5f50bd8b50c584476a3d93f6dd5f3d05ad2f8033cb5231bd9305f642. 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/QZFYX2329643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fba55425d99aca4bee787ee55d1812e1a5b6df38f4668c7f2ebac9c077646f8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZK6L2355481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba90dddf47e019af028702b0a6c1f228e8d509ea80fb8c7699468565e96c062. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:19:55Z), 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/QZMEP2397441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f26c84deba6ec9bc3b0e11782fa9fe7cad0d489705521d2b7dd9afaf623556b. 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/QZK6K2418310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac832b0ec206c0b8fc74fa9dd955ab40d73a73664c05f60db89c3d74c84f3b8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFU2407703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9badb93c808f06add0eca422747d6115f58d145a5a2f64a4fa75ba162771f1. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZHN42550528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784e5b1cbc78e8d08ad3da915cdb06009f1583136569168c82eca4b3bc96090a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6N2501784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82f851b4a452ac5dbfe278b0f0250648fc193a78a7068547dd49ad78927ed49. 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/QZK6M2587379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f73a8069fc02ea38132e32c971d179947f89a956edc9d1a831f01c8bccfcb29. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:32:57Z), 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/QZK6K2532672.