Koryn Mattanah Hawthorne (born December 26, 1997) is an American contemporary Christian music and gospel singer. Hawthorne was a finalist in season 8 of NBC's singing competition The Voice, at the age
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 0xe6a3473364604638d8521c9993a5951d81f9dd083a25c5352e1d413e6557d400. 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/8e64ec93-04c9-4674-a9b8-e443c521684b.json and https://artists.proofprofile.net/proofs/artist/8e64ec93-04c9-4674-a9b8-e443c521684b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
How Great Thou Art (The Voice Performance)
Oh Mary Don’t You Weep (The Voice Performance)
We Can Work It Out (The Voice Performance)
The Complete Season 8 Collection (The Voice Performance)
How Great Thou Art - The Voice Performance
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 0x2fa39a97c30bd1d9a47c06c8528381f6a861582160301067c996a65846b1373c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USUM71504658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfebcc8289d2b36958246690bfb3d79bc7f09cbc4e8ce91e84bbb086c452591. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA5W1700109.
Reasons (feat. J. Monty) (feat. J. Monty)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03fab151ea82c4391c31792bde9b1bb56d29724b8c74b504a27a8d72efa24cb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USA5W1700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247e5f7cf6928613815c165044de4b24a7990f26072d93ea7cba425b94b59c14. 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/USA5W1800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0711f970ad229ddf3bdd57df680b89e40cd01cf8e118fc2679bb6b2fb01460d7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USA5W1800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a8ac392d74d96e78d9146e52843bf8ee1ca3d5b161d7ba51872171976806d6. 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/USA5W2000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a23d3364e0908b42e6fafe866f4d7f2432c6b69fe655a1139d9a5896b4b0056. 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/USA5W2000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94c3c07235559eb1d65a4b5e29202c6de0f76db2479a216bf22963a572446a7. 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/USA5W2000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38063545f6849b2607c24dad648cce0cbac78c2763a997cf95ee83c282561a3b. 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/USA5W2000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b613531f1656f3e97ef0344c7baf532495775848c2075269da99c6e9d786246. 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/USA5W2000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47c3d35a6e7f598f9f02d76f37c140ca8790bfebb3536c6211d050d15232540. 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/USA5W2000181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cbf63f680f16fe05daffed61a5dcbf7f0199614090831c7ff33cc7a4cfd320. 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/USA5W2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaa897267774f3b6a769b1027523518b59574e502d90b47fa2efc7722590c4a. 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/USA5W2000169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466c3eb89179870288183d868f2c9da5d1555767f9f76c2fa6fce2b1cc45da56. 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/USA5W2000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3f1ea4f9890c7ee0fffba8766a62a39763fed15588c3a939804d109ec14295. 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/USA5W2000167.
How Great (Essential Worship Song Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81515bdcfd9726e2323ea5ed3e290269bdfe6ddd21b61f68f9f0df4252258157. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USA5W2000272.
Speak To Me (Queen Mix) (feat. Queen Naija)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2334d9e3edbd559b9348d7e2d5863f74a7100e5aad3afec181b5a8caaf442b85. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA5W2000271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81515bdcfd9726e2323ea5ed3e290269bdfe6ddd21b61f68f9f0df4252258157. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA5W2000272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0900b7d7b38de5d674eede380ec8cdf9eb9b974b94209b2c643aedc89417d3. 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/USA5W2300673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aad17b66be3280f7df2732c8f124b2f73e103ad6a45d005f03428d84c71009. 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/USA5W2300399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5c169bcadef356fb8d18cef19b243c34fb559e0e728a460dae760cd6362d14. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:02:42Z), 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/USA5W2200634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6790ba262f5aa3f202dc79288a45529645241f792408f359a947ea172325d10. 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/USA5W2300783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086b1f0fed5bd6d6a67ec0175c3005e3fe17863bd8b915bf329ddbf67fc38aae. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:25:32Z), 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/USA5W2200633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5714fd84ab7de8bb7e2ad8701738ec96447bc7ade82c0ce508782f4deff624e0. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USA5W2200636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb564e435e834e42ed19f2f622be48a9808df4f39f0011561516db82941a12a50. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USA5W2200630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bfd7fd321e701635e066cf2822de2c2a12255e271e9a9144b923ae87090a49. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USA5W2300785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604d224899ffc4ec1d9db0a5f3ffe9f0c4474a704027394d95877d365e1561de. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USA5W2200632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ba329457d0ef4f0c1a8b0bf9557333c97560670858b9ce76abb9584d9a06ee. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA5W2300787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcd37cc9878a0d392e89c98a13c1cc3ab342cdc4364b14dc16710c328b591ae. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:25Z), 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/USA5W2200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aad17b66be3280f7df2732c8f124b2f73e103ad6a45d005f03428d84c71009. 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/USA5W2300399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e73e006a40f4d9be12e604e165dba1a52c6a3b165fcd5d6b7978138e4d906b. 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/USA5W2000232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d16e2234816e2731d379b133525eda6ae5b503ff298323e6321edb13bacf34. 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/USGOT1862024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2334d9e3edbd559b9348d7e2d5863f74a7100e5aad3afec181b5a8caaf442b85. 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/USA5W2000271.
Same Blood (feat. Joe L Barnes, Koryn Hawthorne & Mav City Gospel Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538a05ca4ef07dd84d21f8b56e28c6abcd6af87be69408b996b53f8657e77bba. 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/QMBZ92156549.
Overcomer (Music from and Inspired by the Original Motion Picture)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f25f2079beb6365099beb887d015e9c9499d9f7f377194ad60e3dcccf7bc457. 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/USA5W1900180.
All the Wrong Things (feat. Koryn Hawthorne) (feat. Koryn Hawthorne)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d1c6f575ccba483fade6dbb68f1f27b92603e95b67267a7307a11c693a679e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA5W1700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d1c6f575ccba483fade6dbb68f1f27b92603e95b67267a7307a11c693a679e. 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/USA5W1700054.
All the Wrong Things (Voco Mix) (feat. Koryn Hawthorne)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef1aa9dece9f5889bebaab5a4288da9909302728d3cd8030ebf2f6363dcbfd3. 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/USA5W1700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26629a05927ce29fd0a0a788fcc544191581933fe0f707f0fc22cda6a1a24b79. 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/USA5W1700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5359d3b7c02b0613c20c3d5603a4526bd0648f5ee822decaea7670f31b3c2d5. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USA5W1700215.
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