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 0x3bbffa7844d528650469af6daf4c8ff84f1a936fee2d53beb86c4459e49a5884. 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/d3dbbb46-8c6a-43c9-a652-c9ee5def23b7.json and https://artists.proofprofile.net/proofs/artist/d3dbbb46-8c6a-43c9-a652-c9ee5def23b7.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 0x8fb3790f8507d0cf6f30cdd431acbbd0de08ea5eed554b888585205d21760776. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BXIV82435404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09911a29f2078c6c5080a471abeabbe6934764e28d87d0481ddd9cf7fe5e4b18. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKNNO2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe721899af802ab672d8c0382d1a3aa6fc9819f1dc7a0302ec4f95bf56fd35bf9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKNNO2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4d1a2d7375f50755a656550a2fd34890e0b70801402f6bc082ab8eff91808b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKNNO2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bff57659aa16dc283cc28be9b4a1a2aa31a80e193b49d9626f81170287ca1d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXIV82425106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f521ab4c8a7b074b6839f9ab7a999915287f275fa24296a85b6ca1c75f90fa4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKNNO2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a44dbc7a9e9741b2941bc8de45668a88016a1b0a07af5cac2720938abef43bb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRWMB2300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1758198a2552c134a051f194a0d7cec2de952f823f3e535fb668ad192104613d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKNNO2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40f8578a6aa5ffa2f66dff55c4adceae9c6d8904ba85771fe3d612a22ffa99e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKNNO2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6d5214d8474da894cf83a8501330f847fb97b31ef23a5753e0c7338422bf1a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKNNO2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f3844440eafb95333e79a6a386b02fcb989f971aa7bea7bf6c7a2f3c41c765. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXIV82499967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f97ee697b49cad717cde82b52f6954b19b754226dc86ed46d6eb83eacd12d77. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKNNO2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c5aa37085493434bcfef3cab463ae7ed04cb3fd8dcb3c2d615cbb1aed3dc09. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKNNO2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf288d3cfa76f0be3c41ac3f5a50025396106304a53edd37ba773be9dc96c708f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKNNO2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f198f181a380d3ae6aab62d0497bbed13600908ef0da936b619e59ca4935a22. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKNNO2200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb504a1fcbda84bfabaf504ed2a6bb347226d9113d1bc5e790c94b4ac087e8b65. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCDFI2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9698c0bb47db11ae0ee796838b9ad1aea734b1b1c96e19bd8b8b959a7ec4eb5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRWMB2400847.