Nika Roza Danilova (born Nicole Rose Hummel; April 11, 1989), known professionally by her stage name Zola Jesus, is an American singer, songwriter, and record producer. Her music has been noted for co
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 0x126fed7d1efed849f4beaddbffa68d011b10ff56367dec6a07a590958aa6dd5c. 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/2d74b616-f147-4494-b658-15e9fec3b402.json and https://artists.proofprofile.net/proofs/artist/2d74b616-f147-4494-b658-15e9fec3b402.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 0x4641434a254bdffda13e7adf77d6257c5d0c9987d5e62dd6f2b9c6b33a3cfd03. 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/US5NR1176201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812bda9c528175bcfdc7d83cf2666ff3ba1ded45b7d6ec25cf7fdab9ce1a51cf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US5NR1176206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3981825994e87952f8928ff6def80e1c51328eb921c97401dc01e706ae60b35. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US5NR1176207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319c89050096c2f8f51180ffeffa0b9dfdf8d0069d8fec81b3631138421631be. 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/US5NR1176211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e96c7b8eff37f0b9cd6608dc5f9ed4a24cc41b56eeaf777854d22db48f818d6. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/US5NR1338801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a867b5d9c3ac6623de105c23bb15537f0601bbc25ac0aedcd44a2f937b0abe. 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/US5NR1338803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a98528781e8f9390215b0f1ad7cf99a2ea047ed48b4417ed7632f406ca01e7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBR8R1301237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a98528781e8f9390215b0f1ad7cf99a2ea047ed48b4417ed7632f406ca01e7. 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/GBR8R1301237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4190a8afdb7a01e92258445e1c8e88115a4653287f605c068570b3860b5c1049. 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/US5NR0900194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faaab9bf9f50bcfe9dcbc8b0f8e8651675c0344b7096f43b1f0e56c94c98a0c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US5NR0900195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2500a2c4c0b89f7ad2bca41ccbcb71ea25c8c8e03e9ad7c36cefae012d431fba. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:07:44Z), 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/US5NR0900196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1868ac27e9667957c8cbdd4c0c87b441384429e93d0a476ab0d716671b2d521a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US5NR0900198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf205aad47a9567f88943e882545c71f5841ee80465e914ddbea437180031199f. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/US5NR0900259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fdce9d1645256598d7ace88741028c213a2f70fd666bbae340052532f871ce. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US5NR0900261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9067b20b69120ca0d67f7b51fb84cb1abb1108c67a1d45073ebc495fab68a804. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US5NR1718401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf58ddb6cf4db359a866c4fc64ae9b2ab496f29c64c4d4fa256a4c47e49128d9. 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/US5NR1718404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517c7f5c6df4b4248cea9a3a02e822725b3d390dd86a08c6e7bb78a34f55b820. 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/US5NR1718406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d43744060af1d5d45679da3a1b770ab9c02e8cbdb01f69ac709fa925974a4a4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US5NR1718409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83cb4a9d637cee5a23e086f76d352aea8f2357649074c1d02636297aa97ec27. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US5NR1718410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2d3bb7ed5983b0387a84924f075b9514a45f760ce2b5ee432803f70bbce54b. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/US5NR1718411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f4be8a8708ab16d02308c02bf9f718c890a2f045fa58d5a73a37a43ba24b79. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/US5NR1819701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedebeee7b5e51d0cc775436dae932f08889e592fcf454d9311989fdd17230ef. 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/US5NR1819702.
Wiseblood (Johnny Jewel Alternate Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddca38000c2e5b197d75dff2e2d6a38d580b9c5dea49745c6409ad3cf79d2b5. 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/QM24S1835745.
Ash To Bone (Johnny Jewel Remix Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc58d2821486c5b78bc1cd1c1dfd79b125ca83aedb51f229021f03b2cbdefd3f. 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/QM24S1835746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17311c592d9cbb22425b1f67b60adcd816a9c860ac13806e9f0fac1ed695284a. 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/QM24S1835747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5512a8f10307c1a99e58056f50075ffd4952171636bcd0ae6e571a276731532d. 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/QM24S1835750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd94e8964290abbb735ad0180827fe310beb963a11ecdad2e33ab31ab53200a. 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/US5NR2229703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe67a877379b9a600e6a7df4f6591817a88448b7b87d5bfdf1f7ac2fd4f4936. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/US5NR2229704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703a0b88263f431c8c4926533f97f04a4647ac256625b4d9afae6b6830d6029e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/US5NR2229705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a6356304f645fa3a4b40c702d2e487d1d218950514aaee5c7dc0e0f499de9e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:29:42Z), 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/US5NR2229706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb01a06a23ace9506f7f29aca2d054f124cc35393cf098ebc772fc95d1dbc4f. 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/US5NR2229708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3934857c26c6dfc6d8a8eac7330496b4223b6a99426bbe05cf81d5043ae3e2. 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/USC4R1802338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cabc8118a41e9ac0d63d20a34277d1eeb75d301f3bcad9c63c364e45fd6c7d. 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/SE4DQ1900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4398c6848e75e80e772cfe900f3a2ddf7952ccd8da737a7093e2764a4aa24afd. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBQUK1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4398c6848e75e80e772cfe900f3a2ddf7952ccd8da737a7093e2764a4aa24afd. 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/GBQUK1200004.
Beautiful Boy (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17311c592d9cbb22425b1f67b60adcd816a9c860ac13806e9f0fac1ed695284a. 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/QM24S1835747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b46f8f8593681378335f88305dd2c1671ba0fa2a0ddd5dd7155c4cacbe2413a. 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/QMDA72167687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3934857c26c6dfc6d8a8eac7330496b4223b6a99426bbe05cf81d5043ae3e2. 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/USC4R1802338.
How to Get Away with Murder (Original Television Series Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882807920661b440309b5f5c7859b9b3e2b3bd0605b496a0a85dad7b3c758e31. 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/US5NR0900197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4398c6848e75e80e772cfe900f3a2ddf7952ccd8da737a7093e2764a4aa24afd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBQUK1200004.
matters in KONSERT - Live at Fjuk Island, Sweden, September 2020
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa179e932e4163aa4409553e4edb0fabb29d27e0890f7aadc7a9042282d7c4c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SE4DQ2100112.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch