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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e36a077a6b731421b9ae115816af7b81b987f7f9a6354403e01b0a64417bffa. 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/ad4deefa-e25f-4e9f-9171-49ae0e8c8351.json and https://artists.proofprofile.net/proofs/artist/ad4deefa-e25f-4e9f-9171-49ae0e8c8351.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412efcf603668afab921f8989499da629634957b4c0f2c811d93f1147db25b26. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHNA2402036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a081007c12807ae447f6760dcaafc83dfa16d45253f29a650c668880ff84c0. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZHNA2402039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ae2fa21a73d5e021749ffc32fce75d11b37681b15212bf6b10767f48c09c78. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:33Z), 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/QZK6Q2417389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a7b03bc86304d68043b2f24e4b490747ade8cf4ff14be9b0bbdd152bf3dc06. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:54Z), 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/QZK6Q2417392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53768367f8bf1f628492bc3f8468a275538f17d67cd49057fb8bb3979319812a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNWV2404768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3232c428e1c3a4837dca152fd52a650c5cbd94e12f3ddab0263c6e7d80ad5a0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:02:05Z), 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/QZNWW2446162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077efcd6b113c0414f4a3d01a0512ac02f027da69967ad0cd325d615142c79b2. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/QZTAX2477319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc738bdba9cc9ebd73d72bd4d9b4da0cb746b4538a310d61eda6c35f55ecdf8. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZTB72466885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ae1f5a6f3ff6c7548ae7777dcda41c642ae7f32c3fbd1b329c466a24d1ed60. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:01:57Z), 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/QZTBD2445097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eef05a28701537308908704e312ae8278120cff20cc656a82eba490fd172dc. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:27:17Z), 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/QZWFR2475023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ff39ec9df62fc7bc6a483c793b5fbd40292d068da756f9c899e1315bb7212e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFR2475025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35aca4f1ec8b72ef110ecb3aca190f46ae1a378ac43d5f179251a2920ebefbb3. 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/QZWFR2475027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954314466f3a34e69d70b4037db4b679371c686884aed5052d6fb422a34ccced. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA72592574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17a9e79a36c45e09ee4127771742360e639db3d17f728c0e507b1534961abf0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN92584523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa603a008f024944c064d33c375be20f2b6d05ca75febb1005b763349ed1f96. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:47:36Z), 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/QZTAZ2553347.