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 0x31cd845f90f71e2370934a5ca62ac83c528e075965d86e857c7d2b920ae68ca4. 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/f91dfb38-6a90-4f11-a37f-f84c4c58942d.json and https://artists.proofprofile.net/proofs/artist/f91dfb38-6a90-4f11-a37f-f84c4c58942d.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 0x9d6d8f6bee18f81482f71a77474fcf93ed1984030f1b696d9b44b9f9aba7d6c2. 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/QZTB42205428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6007587b662383257e036b6933afbc27f52cc00e154fff112c92f356bc4833. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:47:24Z), 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/QZES72369072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3278de1678bc9e5e6c93ac2c50d2b745470f6fe6f3170b8e26e7f395003ecf55. 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/QZTAZ2342481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fc7212a913e12e108cb27263c9512407678f28f292aa676ed812994ff52710. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTAZ2342482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35b8557777f60350c25e0e997e138a57f6d7cd41c32ec539d45c14969f1cd66. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTAZ2342485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8690d3c989269d2a396138a5e103c7ddbf8a2e84c6a4d9042b9c87bb097ad80. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFP2358246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba826d9cd212a6a9f7c62746c8a73809548459a42172ac03d5961ff142d3794. 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/FR9W12413376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f834788a70623d5e8669486d3af641ea046c94b096cf6fb24f0e2860b2608c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR9W12423614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d159acd60e31a7b0b72391c20d9d433ade41b8d5dcef962f8fbf4839328e4ae. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:27Z), 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/FXR852400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3069805258e488f199eb9ec438ae2340474f2c62f398b1ac6e26a3c543cd86e. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:30:36Z), 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/FXR852400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1467b2b518415f07f37129c0a0c80670176337abeb8ce389fe5f1d0b072b06ab. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FXR852400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8db7db9944e21c3747ff95957a44a06a908e478be075369d2589a3be32b700. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FXR852400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196a4901e60cd26e9d9dcdce3519314253242108c21d4a62ba3f5e5febfbd64a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FXR852400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde061e20fa1cd2947f4384a148ae084c6be444b2bff86fe6fdc8b0ab514c711. Chain 2 (Bitcoin): anchored in block 957961 (2026-07-14T05:58:47Z), 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/FXR852500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a935b776c19be67cd80d86ac08187282994aeb77c4be78dd12cebb42e5af871. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:27:21Z), 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/FXR852500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2da1240d778074880ac155dfe89612e87cc9b5c1c77e9fa15e51f776571811. 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/FXR852500044.