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 0x1cfb483a8f280f0f322acc6ec754cb6fcc5c236e46897af17e3862756d8f4362. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd2525a1-dd07-4c22-b734-578feb25f3ea.json and https://artists.proofprofile.net/proofs/artist/cd2525a1-dd07-4c22-b734-578feb25f3ea.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 0x6a7a81f9ab19a2a996f50177e73ba38d7d091b6bd1af8076bbaa8ed4f1e5548f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB52482538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a43a7c7507778fca130fc0368091e4a224fbcfa4a2db5cb764d094c9082e78. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAZ2416119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e594c11b16b5bc68d066fb279a64c152489a5349e50f024c2dae40b252d5dc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAZ2416120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc76e7231c1dd44d69dcfd2602da6def4d7c0c4a36f0c988c1aef814f48b5711. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBB2328473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a7f7cfcee8e7d9dfe5521b81444004d0d3073fda9597a33861bd86c649cbc2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEN2356276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9985c284aa0fef7f284a946c3084feefd9660157aa69836d3ed2212cfe08aa15. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42331308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57f8e495b3a1e374c30f298f6b4152c8836025570ab4e938381e622f6a4d1da. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA42418972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feb8eeb8d721e6eb4c421890b624b0599ff130ed69f1db4467056138a767f51. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA42418973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f19c7879d470b5f7dea05cec35e6c6b4dffabca46660c018506c3ea05fdf9a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA42418974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0834244b9b9cd48060e13323783fdad7848c72397ca3c68d4e7a06de2f5ab98d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLRD52340422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0282b78c7f8ac539ef4988858b0b75d39304eb41fa9e609cdbcf5fda8932dee4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTBF2450730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90772a2505100b84e87b545d8286cbf27e545c9be81567ef2763ac7652702e5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLRD52353067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87668b9cddfcf5b01bbc66cac049a0a19b0c0832f315b4e4c41eaf277d4e02f4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLRD52353068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3493ffb306ae6e4f0c10c8f79bd9d0032b42959914f4b6f1d4aab94bf05eda88. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52353069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e2d7cf797abeb8a0e66f69ba3202a4f64a56e5b80b338aff908f8c189ab108. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFH2382698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5a1be6b08d3daa3718ab116f28b01773ec297d9d05d39e854dee5ef299a324. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMHK2353696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3285347e44d5682b8eadae84847625df305e9e310fff09b57bc0ac877142b7e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6I32397760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9900d44516d89affea018272e05ab83651654fa9bbe0175bf4a3bc8477f46076. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES82368444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fb5a5cc36a0846ea216f601783a5159be099c4d83b05a71176655ef7f5c792. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAS2268096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b678aa2dda92933345e969a101b9e7277761b0ce8519898f867374373880fc1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEN2290101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fec053eecf5fbe89f574af2b0ad075b7664b3212a2386c91ee8f39be9fab4e0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6SA2456579.