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 0x1ec12224197e0f0e27d0fadf6f4d7f5fe1a979684d5ca77653c608d8e7091169. 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/40773b6c-7cbb-4b64-86d6-2b966cb0cd3b.json and https://artists.proofprofile.net/proofs/artist/40773b6c-7cbb-4b64-86d6-2b966cb0cd3b.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 0x762e54c038b76969dbb1783bbc21c63ae4eb79e22640ab56b2f067c69a5bedb8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:59:23Z), 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/PT2HP1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762e54c038b76969dbb1783bbc21c63ae4eb79e22640ab56b2f067c69a5bedb8. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/PT2HP1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd52cbba78745844abccc7e5fd43cd6e562dd2b8575feed83f45665a2e246708. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:27:42Z), 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/PT2HP1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e54f63a8177d5e96504681b7058b447128e68d97892a3066023458fb9e017a4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:25Z), 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/PT2HP1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7cb154666fb4a4033b7315c5aaf5892135b42527dbed258afbc8f82f4c0abf. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:32:57Z), 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/PT2HP2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6903bd68a4e1c080314537b67c39107b46b2baa58cc3dad7adce1589cc5391f0. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/PT2HP2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd813d6e20e7c4f9ef42517f0f04eefee5c4a71c358363a6afedf3c15e9a92332. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/PT2HP2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad834f70909eaf563df5df36b92a417169384c37dc7a2fd265d31c362278899b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/PT2HP2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ecf5cb0fe1c4ce2f0ac7d03d01977c3c603d738b9fcfa86c9efb7e180f036a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PT2HP2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7af38022f4ca74d783ccad7689dab6cc41e0bb5c15d785eca3008826c30024. 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/PT2HP2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7cb154666fb4a4033b7315c5aaf5892135b42527dbed258afbc8f82f4c0abf. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/PT2HP2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd813d6e20e7c4f9ef42517f0f04eefee5c4a71c358363a6afedf3c15e9a92332. 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/PT2HP2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad834f70909eaf563df5df36b92a417169384c37dc7a2fd265d31c362278899b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PT2HP2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ecf5cb0fe1c4ce2f0ac7d03d01977c3c603d738b9fcfa86c9efb7e180f036a. 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/PT2HP2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7af38022f4ca74d783ccad7689dab6cc41e0bb5c15d785eca3008826c30024. 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/PT2HP2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d34ea3dc1ef123432d2ce82f41a022d48d71186b1a6fd0cb91078bdbd425b1. 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/QZTAX2224430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ac9e8ff24cb4fbcdc53dbdb5aae73e8cdae3219f72825a1f953876c3ca4452. 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/QZDA82268751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4602431027c0d56377da3d1f10bba7134d099c4ecab12f5067b32867b782ef10. 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/QZTAX2224432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f5391bc6e31a060740a1c81e3ade9ffcdc75ab74bea61cc586a30736ab797a. 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/QZTAX2224433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa0557850daaf883463d308f615fe6245981a167d6365cd04db16bb83d37dd4. 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/QZMEM2285733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b79d2b707f1d20d984a1d80fb222107850365ca886cd046df7b23bcb65f3c3. 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/QZTAX2224436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551a0eba206f9a76c768e7a3af13b57ae90162a05d3751c2200acdbf6e52eb8d. 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/QZTAX2224437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438003ec29258248d904b54a20e8e251a6cf76a9cc4f6c451a615c7decf12916. 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/QZTAX2239717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d34ea3dc1ef123432d2ce82f41a022d48d71186b1a6fd0cb91078bdbd425b1. 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/QZTAX2224430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de2c97770dcde13bb36fa68d6e2982f2c76f803e72f19648a629e6c4d86a45e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTAX2224431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d7aebf7f84ca091b73eb300e77c50647635c9d159b55e851c82e56aec4e3cb. 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/QZTAX2224434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6813c01c448dcabca2e1e56d4c7ecf02043d2c4a23af43911f491e4c3c930276. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAX2224438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf15625be79121c78bd4652c4e3f677e03a975d5cf242579e641e0f17d1bf069. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAX2224439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438003ec29258248d904b54a20e8e251a6cf76a9cc4f6c451a615c7decf12916. 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/QZTAX2239717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0627225505b4b025aad1c7848dba95067fc48e7537b98b95ae4ff3f859db1443. 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/PT2HP2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f66b3a5463e7c79686fa7b8399ef01bd5aa3590887d15239eaaefd62faa21ca. 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/PT2HP2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031a6273004076896f6318dfbc161c53213bbf79d935e8594d5974c9a6780d27. 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/PT2HP2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0627225505b4b025aad1c7848dba95067fc48e7537b98b95ae4ff3f859db1443. 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/PT2HP2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67b0971d4bbb27341b8cf81b8aeff47318d6f86063d01885ea7fb7da702dc8d. 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/PT2HP2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f66b3a5463e7c79686fa7b8399ef01bd5aa3590887d15239eaaefd62faa21ca. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/PT2HP2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f109aad1c2d2fa919c215766ef928c301a9bb45080b26bbc1ed581b6541972. 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/PT4IA2200004.