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 0xab991f3fd8cc211b1f9b776b0f818c592ca2fc15d57d45f92ca632cc64c87484. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d4f7f46-c1d8-4d8e-be06-dedfa9049ce7.json and https://artists.proofprofile.net/proofs/artist/7d4f7f46-c1d8-4d8e-be06-dedfa9049ce7.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 0xce49f21fe1000281ce28df4b0d0cbf2c3a2aeefd37dfd236b4851f137615a2d0. 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/JPB622202521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab71c3378d608612591beeabf9b87d7319fedec1c7c647108d8cc330c985ab58. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/JPB622201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ce2c7a2fd75ccd3d960914297ffbe310dcf46b830c11480cebf55879e29d5b. 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/TCJPM2063294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82487e17915c178336bd79f1cb41e75f0c099a402bad37abd7142248d5b56f4f. 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/JPB622200763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386f503be9e203134992e0c63f0402a67ddd6166e076204cf4763252436961d6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPP2171785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1455bcbede472f14a465f47b1c73ab3e205a3f7524f84d737037532aa21043. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TCJPL2047230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaaae326752dc348136e3ac1e9321e44592fd1221941b32055c2e2f7f3e54fe0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPB622201012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6250edd28ba6a389dae4901c07024c7b4589984f1543d21080c3d8f97e83973f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPB622200842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650edb8f8999b3dfba5651e2a1a68b659be51b49d3de1f8a9f6e38a7995fe0da. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPB622101399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fc54c34cf1e2dacc0c0db0750542113050ce184ebb5eea5614cc615a266670. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPB622200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b46e3c65080e81107ba07a549c604158d127d6b08393d823963408d7f09232. 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/JPB622400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44daf636a04395ce438650b73b6c4a7215b276bf27fa8f095e28b3a3f7bbc04d. 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/JPB622202085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56549e751e01a56906129194f34ee10e518310296349e42616771f25f41f2e7. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/JPB622201319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaaae326752dc348136e3ac1e9321e44592fd1221941b32055c2e2f7f3e54fe0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPB622201012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6250edd28ba6a389dae4901c07024c7b4589984f1543d21080c3d8f97e83973f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPB622200842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fc54c34cf1e2dacc0c0db0750542113050ce184ebb5eea5614cc615a266670. 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/JPB622200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587687606914df6a1bbfd8d392364d5392ea2c09ad3cd2f7ac96a26fd277d21a. 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/JPB622101530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9929d5d40de2e78de420f2167969e8d9bc7d5ddad2a48fb7f3e90941546b55a. 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/TCJPP2106832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf11144f49cfd8c865ab0d4e6f8ceaab577eb6f72278e40494a784d0c91419c2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPO2113954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ce2c7a2fd75ccd3d960914297ffbe310dcf46b830c11480cebf55879e29d5b. 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/TCJPM2063294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549974ce80391ac889fa41133a5806bed8d4d48b7cc535bb3461b3ea91f285e2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCJPL2081059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283183e46387409c3e0661a09faa57a8f805832b8e906dfaf772d3de675e7f39. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCJPK2062921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1455bcbede472f14a465f47b1c73ab3e205a3f7524f84d737037532aa21043. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCJPL2047230.