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 0xc87880ed8e567a94aa74cd4d9042352411c416f54c90aa97816c11515a88f0df. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cd1fca6-889e-49a2-8d5a-34a4b3bf82c4.json and https://artists.proofprofile.net/proofs/artist/5cd1fca6-889e-49a2-8d5a-34a4b3bf82c4.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 0x42fbb14a0d9f4cec7187a6c368fd126c15a2b02ca6a426581d31ab9cfc6b37c5. 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/QZHZ52189060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6474d47b4db10829cf965ac96d2228dc6d92d468e3add9459dd46402a6e565b2. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:36:21Z), 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/QZHZ62127498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4157b3f9c6937bfd9472278824a2aed94a11b692389cd7331ea775b4106ec371. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMZ92124812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2420765f76b14b2d7b2921341775a881404298877d844d864bb1bc3d06479e38. 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/QZNJV2171771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0af091363648edfec8c98b6de9168952e6a3fa53d30b7de5829a744314060c4. 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/QZWFF2582211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a82d283b7896b835e8cc07af92142e2532019047a75334f79e8ddbe864eb43. 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/QZGLS2414173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf80202d3dfec6ca96229ff58ecf902de0deac2ece2d5ed29bfec6253717393. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFF2583216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca82c952b3b17d062dfbfaf186f0c3b95d8982d8227cd8550ba3c983cb6f2039. 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/QZMZ92461677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fd40a23f02111b0eeb6b4fedfe2bc2f49c400d9735cbee7636fc3b2316915b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZWFH2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5e5ff00f9d4760bc9b248f50c82ad93d92d5a11a1d5d13aa6d1bea04688d25. 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/QZNJV2453433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a989e8dea013e8a3e413ce887f0ddbf76278c337df03a6c72a933a6e2bd21d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJW2490526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9467f80b7304c41db986321885bbc278aed96fbbf0edc4ae73b0892ba3722d. 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/QZWFG2597933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f37f7c0a05361cbb5464a54ee58027b8bcbc338bc3980ff4a8f4767870c8bcd. 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/QZPLR2498689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab13dbfc3000e72745e0955f031c7df1a571b5a63f6aa92ba441e542bbae582. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZTB72428389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809b9d2da9a79b458a164dcba5e947903a74822934ae866bc0bd874f1b6fcd0f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFN2448263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eccffc8a746d7e5787609478cc920a6802fb62a637ae892b3f29aa9e1880f7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QT3EY2437688.