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 0x2cf5e27718816c75656ceba5807dc637f4579d50dca86c5541973d24cc75da3c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82a68a54-d0d8-427d-b059-070af45ec19c.json and https://artists.proofprofile.net/proofs/artist/82a68a54-d0d8-427d-b059-070af45ec19c.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 0x3fb3d96e6fbf7054ba291b4ff1360eb5badd59bb8e4df4e8769f5e4662b74edd. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/DEZN82430623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf51fe93df241969d155ad029ff5ae8826bb6efcd9174f51fe0345b7ba344ad. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/DEZN82430629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efdb15a7bbfcba9a34c501ab67a536512a07039998e54ddf9eab4cffe432d08. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEZN82430630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794c22fb586ab4bbf6fd7a8c15e875f2fd1260d6db76d8424bdc70ca819fff12. 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/DEZN82430627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bd900fada148372a087a14fb18dc42095783f5c6e30a6e8c6842f8f889adca. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/DEZN82430631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4543e5b6fa3e2d6b341f92627e8c7fc968c50cb8c988d2ce7178908a78305f79. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/DEZN82430626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2766b507839a675ae9d43ad2fef817ed39d5ed66fc9b297b592995132b20022a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/DEZN82431329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd58d3ca7987541a8f5a7722f47967443d4973b803635f0dc3c7191fe5e220c9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEZN82431328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f73fecac450cbe053d1f92732c9bebcf356081b0f61ef6c31ec60cf0a13565e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEZN82431299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cea73dc5d668ea9cc85e390d6ceee23fa212fa9e295706dd8171a57dd82647e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DEZN82431534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d078416c57916611187e565a72f912ec563ed1ced643ce37c9fa3bdc11b94. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/DEZN82431933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319157580aeeff4db045b38f957fc8fd9c947b42f56720197736560afd00b3be. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEZN82431908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9202de0c9258783c422731497f91b6775b1fc0a1570d93ff88c59f4999412b0. 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/DEZN82431855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655da794368fbd4ec3062c2a282b624055330af73f9a218578028a813b17e0a0. 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/DEZN82431857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed0bb3affa0a9c1a465525506091aac06c1d6b4b4362d09008a8eb995150d00. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/DEZN82431903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9921aa1023904230b11606b2391a3d7b069425a6b6da78554dc9d9c19b1336. 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/DEZN82431900.