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 0x15a841f8193a19f3a456f11b9e1856939a0e3279a302f8fd14a6f65b5ab8822c. 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/d931689c-71df-485c-9b8e-a460dac1f113.json and https://artists.proofprofile.net/proofs/artist/d931689c-71df-485c-9b8e-a460dac1f113.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 0xca581fbee3583c985f35a52d93c805302aa15e9e65e15c4151f4eb29788e67c5. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:36Z), 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/QZGLM1995698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d55faca282ca921c057d1593ad6d237cbeb92cae509d7070616acbd427b328. 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/QZGLM1996151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49f21bca8d8985633d932c3fe7951e09684acadc80f43f671232c34fc08d88d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:51:25Z), 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/QZHZ51927084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abbb3e81d08688ffa986dbd348768747b07fe7e64732b1c021f3e055fb2c2d4. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZGLS2055503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0775b012f88238670c17b51f9ecb83f8541ffc6b7889ee839df3faf7619da2ee. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZHZ32017319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f5b2dcbebbfd4d5f7a051ef105460db9024e0d51101fa7e978b5e5f3a0c8b1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHZ52022871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd60863d6735ac3190ebb6410d999fc3ddd59bc3dfa0415c2bcd96df343fd171. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHZ62040413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae539b4674ed439af5c34f9722d5383ae725a7b23a06e78fab760c3f8b5ad6cf. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:55:41Z), 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/BCDJM2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4706a4b9e5ff51f4b7b78715490c7a4a728847393990d46c1423f3770b265f. 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/BCDJM2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae60d06ba73c7be3ce3c76a96b29e70a2565bf50b8efa611d296fdbbbc2756eb. 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/BCDJM2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57a3cbaa083eac9e6a7b3696b5e08219f508b67d58cfc56278f522a81186b1a. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/BCDJM2100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617b52e22487ccb33e44f0f8c43ef75e251ae1ac950ac826629e185f134be213. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:20:53Z), 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/BCDJM2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46e0943b6867d98ff27eb452cb0f350770416552a30a9b220942b1da7364345. 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/BCDJM2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675ba6bfe9efac27d67271c9c7454ef883ab4e8d62f27dc2f1945642d1abf9a4. 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/BCDJM2100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d014bf223b1f9b0c34a0c58f9eccaf5a9820ef89895a98791e2cc2447404a3f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BCDJM2100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c062e00872945494459b37f17063bc082ed339d010afd5193eef7e76efeaab. 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/BCDJM2200036.
Lençol / Parte pra Cima / Pouca Roupa (Ao Vivo)
Lençol / Parte pra Cima / Pouca Roupa - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a21e5a99ca2575997b71ccd3c09beb8258e3988b85189346613b4bce8887acb. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:30:03Z), 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/BKTTS2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071252341b218dba95ddec4247378321a6681d0e5fa8f22d87c4f3c6b87075be. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/BKTTS2200003.
Clichê / Eu Gamei / A Luz Apagada (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882c9bb47e1fbedae0bff6a0e173e2e1ac79925d743789d291bc19aa7ea652d1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:38:38Z), 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/BKTTS2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a428e0f99f36173930a3c2862ddf99395be23584e0bc7e32507a029b1747fd. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/BKTTS2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83232b51fd924f07643eeda30498ad33b59809e0810eed12948d9e991a93c910. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/BKTTS2200019.
Fica / Que Pena / Juras de Amor (Ao Vivo)
Fica / Que Pena / Juras de Amor - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b65d53476a093f70c65f94f1ea4b6ee31eccd818d0fa19f7ef68308fa860c2a. 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/BKTTS2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4ee491349609cc56e187e6f20d90e2d7b88f761c3c2256db941964e8a5bda2. 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/BKTTS2200018.
Tentei Superar / Nunca Foi Amor / Pensei Que Você Era Diferente (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc577c4115895496bf72f57e94ad85fc9100df2d01ebbd5b14e15ecf18dd2c3ef. 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/BKTTS2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c87cc2330275f6262baa58edeea6473bf74e4bb77a9e20f5487f4ae7ece90f. 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/BKTTS2300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60ca9c1ee2489f985b6a66336f9a98371f381b73168855f0d226ef10b1d8bec. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/BKTTS2300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f18a302953f80f6d2ee249f9fc8f612ff698fa8ee868dedf9ca21b9183ed1c. 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/BKTTS2300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74982ac89372a771751421ab5e2541afff8fe7efb27628d7cce404ed7636d5dd. 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/BKTTS2300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4debb34bb52901921e13163ae1a8d20d29743942233ca5fd370adb62416139d0. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BKTTS2300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd119868be80f3c976d7b3ad5312898d3ef091698fab90d2cd7094d5caec7152f. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:07:16Z), 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/BKTTS2300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa887a089b98e267304002761d28591928302cc2de30a270e15e0923babf4f399. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BKTTS2300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16a294b13c3acb91ae93122dce7710058cc03cc1a0ecfe0d911072254fda833. 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/BKTTS2300163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eebfa485c3108e2c98ac7b82bfeb43a0f49ab506c5da54a089abef3be67ea3e. 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/QZTVM2472761.
Coração Partido (Corazón Partio) [Cover]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2360087c9fd025baf24b319d3d5e0f34c9dc2cbb067ea2357bff8676e06f68. 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/ILTON2506479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cc261a8e16000a2d1d3b81b47c0aaa99ff649f3e00655acf9ba97a8e07fcfb. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/ILTON2506480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656a526dcbb666e1c57b033c650954ce873c0711e2a93c8f8d3693b0538ce658. 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/ILTON2506481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15070ed7daee1f95cb4e7fc5546d6f75104c02f6a4da489e1587b3ea5e33e8a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:59:13Z), 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/ILTON2506482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e66b516faf1ea499bc429bfbf130a355d122fe597f5de3eae801e732b0fc38a. 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/ILTON2506483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0f46fd465c86a0d88eb9c0264c18d36bc5f91890af66ed45957eee7ba9bf7f. 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/ILTON2506484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e98490a27cc8babe0dbd2a52bcbd1786cb229eb6e90cdb37ef165e66277b26. 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/BCDJM2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f6c75c538e42ad180e4cb4781c7adba414e90ca1b3667285df67f6c2973bf0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BR6NK2100022.
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