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 0x67d3ded5291cac868a9d3f0339559df183b0e1a9971e292c116e8c01c3c6de1d. 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/bed64651-f9da-43d9-8217-25e3594d556f.json and https://artists.proofprofile.net/proofs/artist/bed64651-f9da-43d9-8217-25e3594d556f.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 0xda6a97dd52745272fcd5f85d7d49c6b9e2183ae9f60a103287aaea840158804c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLAM42000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbed37d5c13f950848eee0333a470c158924f780f0be51e2653baca43271cb5b. 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/NLAM42000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47277a56b429e8a06001071364607c2700455294daed195f2a9cbf70b40aa78b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/NLAM42100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec59e924717aa49039a2bdc281fae6d6ab0c0ebc26c7a99a432f13b535482e71. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLRD52018926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c804ee2b89a4791e54b25a0854e3ac7033a19cfa0b2afff13bbfc5a2d3f8cef. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/NLRD52018952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7306edb6c356087732f6d6b84050550f2b1e302ce0cc106617f547a38afc1830. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/NLRD52024516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7306edb6c356087732f6d6b84050550f2b1e302ce0cc106617f547a38afc1830. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLRD52024516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f31202b1b4f1e51ebc27c47d5e7045f06c4159b9de3c81a1e7f8681ac201c9. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/NLRD52024529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95190ee9acdbcb7c035606f43699e1583e1e7319b011ddd773c8ebe6bb2511ea. 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/QZES82259177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a466ffed2b46704c3a4c1537ef5b612b8619da59473fde314d89e7a7cde00e. 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/QZHNA2210919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acdba2139b309a7722f573f5b4bb4eb03e7c64d9e4fe43b96626881019db464. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P2228967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc992d5c97221237eed354353f9327cfcb5610cad7a211abc15db0798c195beb0. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USA2P2265873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcedd80a33752289c162ff909c886b1d2f4583e0adbb13362395ec086c05a95. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZK6K2302866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b6d48ce252020b8d6f88d41c4f5cc2d487c17301b1082580a189407777d08f. 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/QZTBD2385341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68666a8fe3f9a4a4fd3c5e7bd4ddb3a40ba85df6c052d4bfa72896fa769ac68. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL1DT2400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd398aa575fcd480f47d942b826fcb128c6e83f1669eacc22417ba93c3a1ce59d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZZ7S2402221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa055d565d81b97d6c40d7904a54510909db6bd3aba282e8507bc3c86f88dd2b. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/NL5L52500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b69d66235f522211448111d69d57d4a47a699c78a02f83d5e7f472a1d9f6a4. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZK6F2003062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0d4c8a0003b8563597769870913cd44e21aa33bf3a6a2b99fff17daac03a60. 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/QM24S2007666.