SD may refer to: Military and weaponry Smith & Wesson SD, a line of pistol (first made 2010) SD radar, an early US Navy radar system Southern Cross Decoration (SD), a South African military awar
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 0xc2adff99aa53fa3b48cd288b7253a1e2565c67cb873b60aa730859819c1a4394. 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/99871318-a76b-45d4-bfa2-b7739355377c.json and https://artists.proofprofile.net/proofs/artist/99871318-a76b-45d4-bfa2-b7739355377c.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 0x2c61d3729e6bb6f910a492f96160676f6bc9602255ef72b14ed031f61c2cc57f. 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/US7SR1500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8490a16fdd8c7199c11f63c9563d4035c416e8ccd68a9da3a8153ba092812b54. 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/US7SR1400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684883071687a611bf51372cae918e02266d8e4713633fd0247bafbe8250c21b. 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/US7SR1400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f72c4f2151a783902f7c0e3b948cb5a4bbfd711f32e22e53cc1072b5de28ea6. 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/US7SR1400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2865a7146a53d06c226764995051d29d22c2f87905c27e017a90d88849b285. 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/US7SR1400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530c6605019595992e2bc2de53b47fa30211158d9c2ce4b1644cd12504e723a2. 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/US7SR1400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3184758a3d72ac9469196b6cd1598f2898e24a3ddd190b39050bfe35035fba1e. 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/US7SR1400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473a7affcf9fda779fece6ca8a8dafd7ae0facdf144cc860975a7b7eb8c47b61. 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/US7SR1400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bb29bb681cce2ad2907d4081d7a71015bb23e363f310bc41d875b672acab3a. 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/US7SR1400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eac05b60bedcea3ee55addbba70b4e9d48e7c148a44d0360b9ec04264fd1815. 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/US7SR1400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65983974dac7e05fe206dbea4e3e930418fd57d55558fca68d965215fe3ccbfa. 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/US7SR1400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910db0d077264e2e12b791b2f2547b3163bdeea6c8d37e2d41c1e11651bc963a. 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/US7SR1400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f7a00144a8062a1e255672dd086fe4d10c5eedf97416b4dee12949a291a109. 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/US7SR1400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a3bc9599dfff2dd4e37b1f7cfca4186301f3b63c101642542a35ffbb6ef5d6. 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/US7SR1400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a558a4c14d7b5133dd2bb8dab8cfe56a0712b08c90ccf8ae27353111b3efad3. 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/US7SR1400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63bbf6e4829aa4404653032143e24fa2a69e0a44d55c05a9e2cc38ae876370e. 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/US7SR1400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eeb406676abb1c00d691ff01dac0fad52674a5e4baf39258573e43cdadcdcaf. 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/US7SR1400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd210a509bc075715f51af8fb2036fb4a03c2f4e375fb4bb306b8c956096895a2. 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/US7SR1400109.