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 0x215b175d9365f501a2464a2289689f4df383fc167b94f1f0b6fd307b2c9bb957. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fedb11ad-3047-448a-82ba-1d456d286163.json and https://artists.proofprofile.net/proofs/artist/fedb11ad-3047-448a-82ba-1d456d286163.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 0x89eb5554210ab4148c7b50ec75d80f91f6fdd747aac34407cc1bbab2856c240c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAJA2469077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24908d2ee20e6b354a4cd06f63fbee200c661b700a14599c7f86100e94e1ff0e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAIL2476797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d19b977b701aa79d08b66307081886b26ef7c16a912cb2361c1a0e3203a5fb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIP2466824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e8df9db1a83a684b95efa3d3ae75e1088954b00c9959a0da470a99b2925db5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIO2466648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6221b24bc26fc96d4d432dacbf9497efe7f8bcbb29592a18d899beef02dd9eb1. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAIP2499899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac2da0f6b92afb3c1d39dd7062e6e18488f1fef10febd1160a43a95e537c0ff. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIP2499909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9082967b1508c59e33297678b3c836288e7066d3ee8169fd34ff7346a24b741b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIP2499911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cab4ae72c774305afd3a4b1b99d8c137c39bec1da8f833cc542fda17cafa3a1. 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/TCAIQ2499914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a59efa05e81bb7afec99b77621dd894f871ee20ed060975aed68ecc06aa0e3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIP2499916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267f66035bfb42a6cf1d176c685b4232c2914dec292541951a0f5efdb0ac433e. 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/TCAIP2499921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd5f62a985ad365188dd451ae66dfec15623e4e591f8786d060f332f0c021f8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAIQ2499943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173cf1664dffdbb61584c63973d85af165728f3e5b07daf4751b8ead2fefb4dc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIQ2466887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46e6c26758a3c32c161ad2bb82fde9c24c917c2fd3e1df8a6b0633d71814d9e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIU2462297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb33bc59464812d86b2be22c801bd10d9d7285f70541274d10fcaca6ee4508dc. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/TCAIR2447026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6a1c5ecae63e2f19d1bff7f31680e998f767e31e4b86b95fae7f379465deda. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAIQ2446808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d1c54909ab3c50e651066529125615608919015a3a993bc9dcd231837327f4. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAIQ2446734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cf2704bbff5cf6cb20d3213830aa91190e7683ae65fc047418e3a54199d8a9. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TCAIR2446746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0333d3898fb638ae03477dae2715521decdb86daf7b35ca0779637ff8ffb45. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIR2446741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad155c344e53d0a58ab354e7ebafa3b6f1421ef2b669244a8153638a8e3765c3. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/TCAIQ2446809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191a92c2803e82d575758d5a320c53773e1fcc66b7c1f6fd75ff86d72f464f76. 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/TCAIQ2446855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11f0d02bd2bef07ef6499a251b2d68e8158b9771169196f0e04f92181faaf5e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJB2457951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf186f6bf3a463bd25bd9666a6959711e37bed304723909456ec9c507f7fa03ca. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAJB2457970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff61ef6791fe23335affc03f3daed6476340d7feecedee3a080027c0323866e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCAJB2457973.