Hoffman is a surname of German origin. The original meaning in medieval times was "steward", i.e. one who manages the property of another. In English and other European languages, including Yiddish a
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 0x186ce8997ecfcf3c88e0aba959390fc80bee857dd465fcde39fd81bb6e44cbc4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/352a2118-e6a5-4558-a312-0cf7f5824207.json and https://artists.proofprofile.net/proofs/artist/352a2118-e6a5-4558-a312-0cf7f5824207.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 0x0bc482441dc417d7bace57755df14487dd1f3f9bf20f7ac01d71b401666e947d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GRSTY2202063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8123dfb4aa1089daf1d669d4f11ba1315aeb6d3bd0b8236459c0057d792eaa15. 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/GRSTY2202073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0dcb99f1016bfca449c0bd51f51b26f96bca14ea92a1c5f6da717b0e2f265f. 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/GRSTY2202029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210d4a070457eb003b609190026060e9c1c466a0a24a5e23741b940bed0080d4. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/GRSTY2201924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2662565cc8bf178c7c29553919eee8efd341f9a34345b4cdf8ad8c33213fe2a2. 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/GRSTY2201926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd20628dd31086359de06fcf39d8e2ec2e42b090064b2819d30ed34740f741b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GRSTY2201931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e99a36571d9be28ba5505c4cd7c2341dea84e001de9fb56d8e3bd76d5930906. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GRSTY2201932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7a7365d2005610810ab182ea02733b3665e245b6c18e25734814d6c907f25b. 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/GRSTY2201933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a5b13ce5b65cfe6be7589600bea5ccec3b552312e9b48f3ed25169f10065b4. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GRSTY2201885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3cea791e4b10f5c77c6ef4916e273b0400c14eafc65fbb69346a945af8679e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GRSTY2201889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416d98273f6f1e642f4de7f180bd86f3c6c2969c9e635923af1dc6be1fde8bac. 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/GRSTY2201898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650f328db8669bf90ef8db88538cf83fcabcf053fd0601b952b716111e0153d6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GRSTY2201900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af1e7779dce14457c4d27e21d47f963f643a272e05d47edf0d62ccc907f4603. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/GRSTY2201905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf886488deb772b7b7ae8e610f4527edeaa2d471115a8c4abae1b87055a34c878. 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/GRSTY2202027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaa6fffc1f04f51838c473ab0b237ac894bd53bfbe1020e0e2783ad37951901. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GRSTY2201649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68f3e05387d1249cb4ff9d4f46f67cbda1427b6a3255a0b43e8536c0eabec3d. 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/GRSTY2201650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0f09bdabb7d3fedcf22cf9ad924094ea434b8865977fd8aeb725b785788925. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GRSTY2202477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa705e4596fa0ec3e9ea7b90770ee8776103b2fb5d8f98e266b52a2985ff5a3f7. 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/GRSTY2300890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c17d468bc48781ca717bc70f1fb354bff993edc4d215a80f837c547f10dc54. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GRSTY2300892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bede97a1d691ef0e90cc9d535646c9a8434c22da39de3b4b7031ffde1d228c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GRSTY2300894.