Holmes may refer to: People and fictional characters Holmes (surname), a list of people and fictional characters Sherlock Holmes, a fictional detective Holmes (given name), a list of people Gord
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 0x6b378636f1fcd90a968ad0356b0776fff7cc6a38381c1e2c00770c34d3826154. 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/1e27cb6a-ba38-4b3f-b09a-cc138856f96b.json and https://artists.proofprofile.net/proofs/artist/1e27cb6a-ba38-4b3f-b09a-cc138856f96b.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 0x304a4d4cd87d0ab06a5d8ed7e0f958a3e7555d504bb7f68794c84bcc5d55543a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US4QA0700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500a55ff40ec565d8b9cc5acb783d5650b0b9a511db4effa6eb3f92d1a72e0c6. 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/US25T0914647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19226556d2fd785a4538753f745739075bf9e9fb9367ea4e6b981c24cd3ce062. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/US4QA1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf40b0353b2dbdd535f0d0895a84c856391bac04dda316658f16da643811f398. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/US4QA1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7d0182ad16ce6b04a121803269907b45f4a5e0830f7c7567286872ce00a300. 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/US4QA1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7275618924c3c5c3f5fb2cedfb27fcfd5f7e94d910a847cb5022a0df97c9fbf. 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/US4QA1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d63b12e750238ef3894e090b40f9592d4035efb4eeb4ab3e2670022e309fcc. 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/US4QA1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf69988db2ddf7765e48e4f624d1bc8d1917c6b7fac161421255852bd21bedc9. 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/US4QA1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77bfb644802e5d1b80c06aa785d900cfa248ea7bbef758e51d7fd369daf284b. 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/US4QA1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb22c8c5b6fc801a70d4ed514e6a554cc74d35bf42228dd9f6176a06cc608951. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US4QA1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24a2cb6a51217c38afc5a52ce66703202a997f104022319cd307d936393c656. 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/US4QA1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fc7479c7e4df6b16ab1f9e79c853e121191d8de407bb99f723d032100447db. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US4QA1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484514c05e9af69a0d338fc42b2e651589342784bc7000dc44778876879c0385. 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/US4QA1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa782c1e731223dc9671e15ff8136c23a01f4845979a95e2579b31cc2249e4896. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US4QA1200014.