Stuart Block (born November 26, 1977) is a Canadian singer who is the lead vocalist of progressive death metal band Into Eternity and a former lead singer of heavy metal band Iced Earth. Before joinin
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3ddc64b1447485732ed27142801e95c7b5558c125c972377cb77dc615cd221. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6e48891-0b5e-4b7f-9694-308fe7ebe207.json and https://artists.proofprofile.net/proofs/artist/e6e48891-0b5e-4b7f-9694-308fe7ebe207.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d84c3320bf1ac7e09fbe4bfc024b9d033c08a562a78e58028cda2d42f00038. 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/DEH842100213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe978faaacfd3f15853a3385f4702703a7a0560477f42d8bab174ff86244555f3. 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/DEH842100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2afe05cf0f35e1c80633e9abc3742532f4ef5242d48b0ea31d2850fc4c9b3f6. 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/DEH842100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f51816ef2760262d940b90f7a4a64c3a471ccb03041b3635681a7d376ff01f. 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/DEH842100216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa4c42a2ee97519f1fb5a6a1f424fe8525aace170affdce538218ae495f4b18. 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/DEH842100217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adabaf9facb47d0d095a0dd71007ccf180aff27ba87c98ff6c3045022da730e. 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/DEH842100218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc7cbfc3d8f6a4e569d917a3183708bf9a25835f292a1e5f1187fe700916286. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEH842100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca9ac26616cf5492e1817201d17be99052c727a22c25a0c484f76088fbdd0ad. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEH842100220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedface48a0ce5cbc655c1d174f31c89d2547303141560e6dca6f8a96316264fb. 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/DEH842100221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ddfdccadf380f8e01b0090a3d3c0e62805fdf1533dcbd68c8ee33aa9a9bc75. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEH842100222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe629234603eddd3c0118f12195cfd0a7c1264051814f075398a292f8dac8ab9a. 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/DEH842100223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc7cbfc3d8f6a4e569d917a3183708bf9a25835f292a1e5f1187fe700916286. 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/DEH842100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe978faaacfd3f15853a3385f4702703a7a0560477f42d8bab174ff86244555f3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEH842100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90bfe74e44b5d4180d71e7e5f246ef50efb9e065758237e8fdc6166d7c386c1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZDA42169675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd729ef01fa16e3f768daf9e4d3b4f6f9c57f2646ab2dc5a9284ed6905dc8476. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEU602109850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f71905bf37ba780d087576d5591f0a297b168a11a26649863da0ef9a151848. 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/DEU602109819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5d268917004c160cdace934e341ee36a85eb12b9c02540e4767ac42066d0af. 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/DEU602109820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045eb8420c2a5f8468bc06ab00961d87cc922a7338625086718d0395656d52b1. 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/DEU602109821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7d32044cdf79252e36b35d77791e6ada285446ceeb3fc9d00f6c2ef6374d37. 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/DEU602109822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bbda1bd6ce8c41ac68ec1c555f9b376a839353a63ffee168d63388466691c4. 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/DEU602109823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2299809aab460bc3d33d866e04d7211e5737cb4d4f5b0fc84305139968f838dc. 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/DEU602109824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf343c7a3fa14d5e0da303fceed4c5dd9758597b8426d58126d1ad2612be4bd. 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/DEU602109825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7d307a22e2d0565054a4a992430a1e6ad399f1df9566814434352c2aecb988. 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/DEU602109826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd540830567ad17d1812791bbbeb44a8576c489f70a265b44c96c77e51f4e0e30. 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/DEU602109827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d728aebe0faa2348b698f8888d3b5413214192f26eee29aff332ac81af1df1. 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/DEU602109852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682ba3e0f933d8190480475e181aec59e59d8db3c13b66006be23aba6503b23b. 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/DEU601707174.