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 0xfb5ab42cfafa0fd7e8636470973421ef6a130da46d22e57805afb9cfda81cb05. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/976d5e33-06b6-4c82-8015-fc125f12b7ad.json and https://artists.proofprofile.net/proofs/artist/976d5e33-06b6-4c82-8015-fc125f12b7ad.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 0xb1013828512e89dbb682eba5fd36dc4458c2a6ef0f742d90f5e1996f59ecac72. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6H2137101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf708eb4ebb3cc0da4ae62608bba9109f82ba3b0b441799076df1491e79ce455a. 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/QZK6H2137105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9597723767c8e92ad7a6a059bdb762e530d6a26fa4e4ffd30f19f632a7a767c0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6H2137107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c26c0cd4e661e95ac4fa2a348608ab05bce3a6931c70ff52d89579b4bdd2df5. 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/QZNWY2141566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24236a67a09511018df1f38df8b73bc50fcc5814b091becbf8499c6662d45487. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNWR2267428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7074a1868bbef287e31dd480cd6b5994ad10194afb39462d5e7fb1caab56d4c7. 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/QZNWR2267429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91218811d12d681cd023162c534b964058b14d02914fa296d0950b9fb2656d9f. 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/QZNWR2267431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bc3ab35b5d129f9f9330db4bca1acf97cd7e28118d3cefd6be4cd20e5ad507. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:18:29Z), 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/QZTAY2344672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f67d39a3f631bdc509f2d03b7f1dff96f71836be7a47a3240ead7ca0c1924aa. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:29:06Z), 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/QZTAY2344676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779df335bd9820fe242570b13aa9fb5a3238b70b56d28b2731edb9ecfb45b052. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX452533087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f94f09616bccc3fc2958a27c72d88f495afce35edf8bdfbc69660276a98ea00. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRX452563505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fe3460f83b477131488554c2f52f5ef7ce2386a167b24f47a58746fdebe167. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX762559794.