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 0xba8760b239a6d03a9c80e760f2259cbc8051fbf949b51ced5ce1d06bab3635a0. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebd66257-dc9e-4ea5-a044-b23264726e1e.json and https://artists.proofprofile.net/proofs/artist/ebd66257-dc9e-4ea5-a044-b23264726e1e.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 0x82368173ffbec52472cf01e20ed383b93675828dad584c8103161f31d88f42b6. 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/FR6V80202394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4f945af8bdf4aa5ed96b31f9d021ea3df1c0a50ecdce3a031585de9f8a9756. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FR6V80202395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86af504dfacaad199ef5904755c979971dfcff0357033399c0b857599ba76300. 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/FR6V80202399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b181dcc6b1b48c2ac53df6d5d11246d8f0061926e36fa0d318a68c7525ec259. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRYCJ1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b93122b64feb50c2f74c71a27ca8e2b896813a50210bf48546b39032ce6a029. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRYCJ1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49673d057bef8a9ee1d127264b585be551ee7e50a3b1c5b019d124450a53451. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR9W12018174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5786d2678f237795449ce7f4fd74edfb3d934e92297c7794a697023c221977. 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/FR7Z82400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92530803dedea235c97a740e60ea39d6b74b2fc744e7e957a15522876fb58c7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR7Z82400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92530803dedea235c97a740e60ea39d6b74b2fc744e7e957a15522876fb58c7. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FR7Z82400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5786d2678f237795449ce7f4fd74edfb3d934e92297c7794a697023c221977. 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/FR7Z82400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d093d6c94354027637fcd2f0cff37500146ae6ca2d251fd181bb012eabc4d4d. 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/FR7Z82400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaef1fa080e99c90f054a5b34d281bbc46843448ecc0b766403e456bf1a939b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FR7Z82400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f61dda8e14beb119860a5b2d15e7a057f719efec00bc86ef44d0b8db102c6d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR7Z82400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3c624c349f895119b80a5add1f40f613050d8620202c5f3246f9511f8b71ef. 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/FR7Z82400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec474f6125c97ace39a58d9318a5a93bbbfc989995b296031e444c43fdab526. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR7Z82400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf946b14001fb130da87d7c03524e2dac5ae68dc81a6fd904eb6ef2050ed2a702. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FR7Z82400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c62e82094a094afe9ad637d2dcb23747a703423d090d2db711a592d00bc2979. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR7Z82400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce745d49d51c876343770e85ad294ae9a28c65d47cf892123596fee1f6178776. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FR7Z82400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaef1fa080e99c90f054a5b34d281bbc46843448ecc0b766403e456bf1a939b. 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/FR7Z82400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a9029cf3b0e92d857fd66d1b86ca5052c70fd12d93f2856a79eb3a337d49df. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR7Z82400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec474f6125c97ace39a58d9318a5a93bbbfc989995b296031e444c43fdab526. 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/FR7Z82400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c62e82094a094afe9ad637d2dcb23747a703423d090d2db711a592d00bc2979. 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/FR7Z82400144.