DFM may refer to: D. F. M. Strauss (born 1946), South African philosopher Department of Family Medicine Deputy First Minister (disambiguation) Design for manufacturability, engineering practice
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 0xaf05772a1f26eff5d86f1599a7e02267818bc6946e6a341d5d728fa3bd0908ad. 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/39cc385e-8841-4110-af19-c4fa2d8559b3.json and https://artists.proofprofile.net/proofs/artist/39cc385e-8841-4110-af19-c4fa2d8559b3.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 0x67df0f4f21888024c4b7993b0de9e2c7cd7a1ffe59f81f3a1f13910a531a37d1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DGA052271423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6fcbb1a018c4ffbaa4f0ea59a374879bbe7a0a805f2891c8193e857c4abb39. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DGA052271425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb2d260749f22bf2b819180aed5c468201197f77912c9cf4e4ee380cc9f4b29. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DGA052271426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fbaf366530eebe8d9585c3cb008e3827d7ff495dedd586e59c571de908a5a7. 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/DGA052271427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1513cf9b3647b0012d2e5fe3ef94923de11d425c316a04228a36514d7de7c562. 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/DGA052271428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355c14e70e2bd2009ad64d0075c414542d058fe443e01a7586dd95b2f94142d9. 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/DGA052271430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a1e83107b2521ad49e31dc90ca7676763dc788b2afbd35e4d0194fbace0170. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DGA052271432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559aaf1e8719a3401407ec34656fa60fc17b7d503885d847117900c543f849f8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX452164091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400e534e9cf5e77c97ddf88b8ede40e4a0f76aabff73a493953874571617ed7a. 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/FRX452164092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c627de5b7499ceb4d0b4f898a6ffd7faae538e568cd6a80cd1c3153b4a2a30. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRX452164093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c97d4e8becdd50ff9d9fcf77a497a307775a33d45d71a05aaccdfde71c097a5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRX452164094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451d78765d78d44198d1284fd675802b3e446fe6d73f0c6fca5fae20cb343627. 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/FRX452164095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a44ffeebb2702ec0a47ec06d464d1088c223d48ce5fe86070906043b3e7e3a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRX452164096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403fa4bb63022bcbac7c74413f1a4deb4313e6619aa1bd70b325d6980a68c47b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/FRX452164097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad636c9ffb7eed506d5e431c68590aabe33dc553abd576f66ad6d48d529df36b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRX452164098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd311e890bf039533e65dae856423d5b63ce4fcd67bfe4b155ff4420799bfa8. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRX452164099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a96c84e7e72c4fc3dc19ffc073664206fc1eeeb92c170d7dd8f65d70acf9030. 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/FRX452164101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4f46b19e797f1a78089f673e69ab782abb2c7427391a2ac0f399177c81827b. 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/FRX452164102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa006221b1794c98e59010cf510591770f68aeee47ad56e58e6b0df79fc7d86. 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/FRX452164103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bddd48f69bf8a44c44b232cf99352344b3be9c0c32e03a9cf1f02538f57ed1. 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/FRX452164104.