ANF may refer to: Companies ANF (real estate), a French property-management company ANF Les Mureaux, a French aircraft manufacturer 1918–1937 Ateliers du Nord de la France, a French locomotive man
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 0x38782e55938d72e1fc9e7f994ebae6ed16bcef612d6f4b95bcfff41bfc69eb41. 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/08b8bdf1-d427-43e8-9e83-9c619c7e7fe3.json and https://artists.proofprofile.net/proofs/artist/08b8bdf1-d427-43e8-9e83-9c619c7e7fe3.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 0xf74ded000a28c402f509cb928a34a93634dc49c1b35bfd5fa8b19d59f39f8d93. 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/CAKFL2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362d2c4e96e5ea89b051061321413c2173c77434d997ba9751713c6dbeb9a4ce. 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/CAKFL2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691b7e4b7d39e120b0ffc561389e5429ca96101a4d54a7a5cb4641e3999772a9. 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/CAKFL2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907694ddfb245e26a6ef6b247ce4f1978c04b31e9833406637356a59daad57cc. 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/CAKFL2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16195cde883d849dcb4d8ca330a38313d0f505514a75a4d9d180d4e86152c83. 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/GBJX31844010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4ac1f2c96157236211e7189881541e8ebb996cdc7ab351803c99b9d8d98e03. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBJX31844011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb302e69ea688a1fbe590a75d909d5993ec887b70c90e889507c45568c8b3775b. 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/GBJX31844012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd939bfc3041844b72c2728c9792c7422fd77f427d1b23dac8a282e5ac4cc507f. 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/GBJX31844013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e7748a2767775d4d5008b96d3a73df826b2a2d2ae99d0245680ce8ba018d81. 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/USYBL1900559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b60243fcb14774b322ff2c01c605449c49ff69ec7f535a18e80323f0c43532a. 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/USYBL1900560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18167a4f60d112d1d4dcc2a010e203f028d05dec82122842e0a11efe1dfe1bb3. 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/USYBL1900561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1cf4ef81d66523e0283b9105943d87d983f5c36597232ee20af3d252501327. 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/USYBL1900562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed60c7bb7891086a4781f9ee38770907b97f1d4915565a9064e4261a35b6116c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBJX31844004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475580a48ead1270e06bd4f1df5e1815f0c925a24f893ec4cbc40a4bdcf00a6b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBJX31844005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da4875be9055cd2b59a23c7fdede3dbd33c079db812d832dddfbcc432f24772. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBJX31844006.