Bommer is a surname. Notable people with the surname include: Alois and Anna Bommer, German couple who faced a military tribunal at Metz along with their three daughters after World War II Elisa Caro
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 0x7259bb531f286f9bc875656fe2288dd64487c925b008fb664b7f76deb5f58453. 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/af8e04c0-4eef-448f-afad-8ad65738fd75.json and https://artists.proofprofile.net/proofs/artist/af8e04c0-4eef-448f-afad-8ad65738fd75.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 0x74c6941b58204357642f6c7f0caba099e229b63a08c2cf22e5889f811c976c7b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GB8KE1356997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a6004f178bf3f77e232eafd9dbd5eaf2da9cc254c56db0b1272d9f503ae264. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GB8KE1652872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9508bc09cbfd95e464bcd5a4b17d81e66c9ded6063f6c3e19948a948bf09a9ce. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GB8KE1652873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696d21a1ccf4f3c3f8ac258ef8f28c55fef2d9ce7790469ff8cf7757391675ba. 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/GB8KE1652874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdeff208cb4bd07de8de13e14a6f309328ce26b7edbee5d9b4a895015135ca92. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZDA62366151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca424f2c071dbd140b0d784c61e25003bfec2cf3c4cf8f3f4dabbc6e9e440122. 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/QZMEQ2333847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caca2f36671468e0c0279d7003ea99c157ddb64b25b9efc7ac0a49302d5ab59. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZWFP2596468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a8d70725edd71ce4b0ddf94d1fa673922daf63ac2d8c228277884a0784ce7f. 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/QM42K1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf079bca1e53126599775010cad1bd81b9a7e5abe1c5716f3856a49c8ac0732ef. 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/CA5KR0005561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8318f39ad846b6415d82fc262fdd783637bddefc5e620ca1a38d6f69d5eed513. 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/QM24S1703784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66001d497e0251cdaa7b9ca5f86c4b015de7aa036e81b82cce57e56e377d2939. 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/QZHCR1900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6817a25d1681b394eabe6543034df0b16dd97892d2783b92398af430c037b8. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GB8KE1950840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc261e3455cf20d8f4cc1a0c01a285db523e740d9f831fc6f7118ad3c5be860aa. 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/DEQ020501493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bad8c1d726a2cee4b6bed3203483448c5ce1139b5d6b29856451cba8eb10d8. 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/QZMEQ2327617.