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 0xf320319b04bc5b1259f7f4f4b839fe9b7698c70272ae672b2d07759ecc4f010f. 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/5bbed997-2029-455a-8e82-ad9a0466d1eb.json and https://artists.proofprofile.net/proofs/artist/5bbed997-2029-455a-8e82-ad9a0466d1eb.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 0xa1d7738d49fe5877735b23325e7c95833b1a8055f1a39f562548d5f1bc64fea2. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/DEXE41900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cae0e5bab6f28c063422e0d874e08bb00735fd4c3f2a39e6a1f575d5a2e739. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/DEXE41900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86027a9f8ef02143cb9a8d490415228a38228127796c32c4855ec0bab9cbd5f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEXE41900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ca8a068b0457e950363a1f99569e7bd9a737152ce4c8cee2f6845363b6bec3. 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/DEXE41900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5279d963551ee87f2c392b0ba7fdf67e63151ffcaacbd72da0bdacbd74d2a354. 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/DEXE41900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb9bbeddfdb945ab8affa13e7f6845b24aa0d73fd9e7b120d7b4e23759899ca. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZI52000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a330623546ed034572631bd68f9ad1157e139f76051481144490fba1a271cb. 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/DEZI52000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b138224aef943628270205cff9be27c825c5728dacbdc2782c7a141a803d93f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEZI52000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8487a656c06ff04a2d8d10e39c184644ae21717ac5af8d8d5d890451d6f0d7f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DEZI52000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8827c430c9de938141261168c53fa0f270dcedbacc42a980b4c2d8be3c088dc. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/DEZI52000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc057e5f5acfc5819e604baa34d54aa02e4838c4f409d4ff08c27833ae4430aab. 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/DEZI52200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f14f3b6a71f1c0d138e4a6045272fe9797ea76b0d00e80d4087128c8abb32. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEZI52300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a915c23160b5537bc50f9bb04806f661780b42e9bebee0794d372f7834626ee. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZI52400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca9f60c07822a213ae1b5157c43a53eefabda851eb3ef6c7805c6d51cc4aa71. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/DEZI52500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a915c23160b5537bc50f9bb04806f661780b42e9bebee0794d372f7834626ee. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEZI52400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209597b931031615c4f88955e4567324a6e1f17923b8a7099c8a34e50883d914. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZI52500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffd2af80fa8f9556ae64799910c0b3b840ef230ea356430937295c93e2bc144. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEZI52500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63c40cbaa8d40acf1c8b8e5b17937d36d62500460a84fb78e28c7309bd93c81. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZI52500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca9f60c07822a213ae1b5157c43a53eefabda851eb3ef6c7805c6d51cc4aa71. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/DEZI52500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478a537034461b0e195d887ab5c210f275439419121174f5cd01b538c65fc34f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZI52500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f14f3b6a71f1c0d138e4a6045272fe9797ea76b0d00e80d4087128c8abb32. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/DEZI52300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181222209250ce20390e2cd04c609cffe62a0c2e2f944d58b7532ebc0a5b3599. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEYX82199019.