Redd Kross is an American rock band from Hawthorne, California, who had their roots in 1978 in a punk rock band called the Tourists, which was started by brothers Jeff and Steve McDonald while Steve w
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 0x6e00f4bdf6948821e1ca64635ccbd65fdee832097072894944ccd5234659dbf2. 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/2774af66-cd4b-4fda-a681-a234091f5477.json and https://artists.proofprofile.net/proofs/artist/2774af66-cd4b-4fda-a681-a234091f5477.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 0x4dd81fb74772ca2cd8b43269f9ae1b1b2c5294139b0ed5d8a2481febe9895fa6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USMRG2073404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdcd37c5427bf9e4222a951af7ee030344a2d6d87a66bdf16655856868867fe. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:24:33Z), 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/USMRG2073406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaacf5c25bdb8146fd608ad430fc3cde7e64371758ba1f36c6923fed5cf7028. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USMRG2073407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d362e32bc297f7c2712347cec8da9ea3b93c48cc36453392d699e83ac2c97a8. 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/USMRG2383502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f9486277541cde30994b4bfa45fc171e3350a61afc34c49710adf225143ffe. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:21Z), 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/USMRG2383503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cd180ae397254aded7954b4657fac88b705c9230f6813acd285c5c8c1e8601. 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/USMRG2383507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26587e76bdd50393334fcbeace2e84ef0264eae5681c3b215901cf17b9de0f06. 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/USMRG2383511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbba5c5a8cc267304f6eb7799d8db9f3ae2588a0e90d6712a14fabf580f7bb47. 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/USMRG2383514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4a8eaf08f5016d4ee665b85d13a23968711a79017f5a194a8cceee6da63027. 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/USMRG2383516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c64ddb71938292ac45f3522e41763001d5784553d54015c7c827222276947f. 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/USMRG1864601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbc955efd021d67a49c35bb49aa93d0e13196147f23ba59efc0a30cd325acf5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:57Z), 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/USMRG1864602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc80d7f31db91aae82635445e2e80904e4522982e5295355ca089bb4223f8ca. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:29Z), 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/USMRG1864606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec30d80218bf6e48a368cb5a809d52baf2c30eea337b938167819e1a720e8ad. 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/USMRG1864607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84febfb0192a19a9c402b1dc0beae12c82d2cd20fff5e01e05047c377eb1a286. 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/USMRG2268501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd554e5b0bd0a5a0a107510e5ea2597314dc15b52a9e654c35fece08f4dd3f7a. 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/USMRG2268503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dda51d2d4fa1792a20f79354ac5b44db313648d698a5fa1272946b2c0a3608. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:06:16Z), 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/USMRG2268507.
I Don't Know How to Be Your Friend - Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da7afd89b2ba7c02502d854e3a4995631b7175546b5d1457ce3b428882dde38. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USAT20802087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe692b1048e297d139068beecd82e9b43e770ca3b58e7cafc70505a30f385c709. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USAT20802086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701d9efc7b5d57406eb9113cb1645ff2f24f1f9df4888f980d5aebd505d0fea9. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USAT20802088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220cc260bcf2917e3d19c1a406f5b98c4a11a96cbb91c968b3bd36283267e028. 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/GBUM71202275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0547948c699102ffe18de5690ed029f45cabbd7ecb62c3be294b03e70a6f64. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBAUP9600077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3a6b5b87aeb0e80e88e794805985ca6c8093c2dfb4b70b13c48d2b0be5d48c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:52Z), 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/GBUM71202279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54303f8a891d91a6f2bc8b8a572055a680774fee750e52742395c1c7996c13a8. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:40:03Z), 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/GBUM71202294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b406c8a39c5904c4da05d4395a6a97bf692fd36dcd82f7db711dba746de768c. 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/GBUM71202280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9289ba9a771644f7295f40a2110a47ccae4853152ebe3d7b75a51b0ac996987d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:44:38Z), 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/GBAUP9600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ea13e26d595853f7a466b28ef2e088989917a5febfadc6e47d72eb3722cdfa. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:31:49Z), 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/GBAUP9600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b520773baffe2d38824370fb9025004cf3f66115b543f2e0f0105faf1e97bc9. 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/USMRG1245403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dfb33d946589f4f13255c8b82343a6a346238aaeda9e1f23678bd6250487e2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA3D1610091.
Notes and Chords Mean Nothing to Me (Almost Live from Joyful Noise)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ef76535efa26d1bde5e6d8c708a4297c0bfcfb593bf51aa3086d8589162f8c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:12:50Z), 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/USMRG1864707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7efbe5ad06bfd7b8f7546052f3172663fdf7896f4941da5c3cb1efd0a8a6d52. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/USA3D2440001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45537d65bb6af21754d6ac494880205d133154e497891763c544ffd9ccd155dd. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:05:02Z), 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/USA3D2440002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7016e0b262ab8cd8de5b5d0e55fe1f56494b672d6289f8e19b56ed787c43964. 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/USA3D2440003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7905e48fa790f667dd803454a75751cffd971a574edc6892f3ce199ce357055. 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/USA3D2440004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29de0b16e4ca24ab729f7aaab477b6f7f1e5f325e6ba98fd1725d5cf508d27a0. 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/USA3D2440006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6639570a324314715f4166d2469ce73482e125661040edd43201d475908ed27. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USA3D2440007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222d649e8bbe489b177631b3dc7e2a4a91abf001b12862b24e96e727cd9aafe9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA3D2440018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25392d2abccd409a021a5429e46e89002deb38bd913c3e5bcbf599285880b66c. 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/USEWM0910003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb42f3df45a3157260776357763e4264eb5dc85e5fc71a3b3bb5fed6d383cea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBUM71202284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c883a54570ed6f55ce940811f1a2b598325c3aa833f083bff26aaca76997da. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAUP9400005.
The Future Looks Brightest - Rarities and Orphans Volume 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25392d2abccd409a021a5429e46e89002deb38bd913c3e5bcbf599285880b66c. 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/USEWM0910003.
Life Is Ugly so Why Not Kill Yourself (1982 LA Punk Compilation).
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf1acbcb4dee784afdac6e231f1aa8162709dff2bb930b0acff8f8482790934. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USCGJ2465718.
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