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 0x4ffe738b4811d91931e7f6a83ea5da0b268f4ed5bf573f1b61719ac77e8aaf1c. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abb603a3-b461-41e3-9c3b-3d2b3c61cef7.json and https://artists.proofprofile.net/proofs/artist/abb603a3-b461-41e3-9c3b-3d2b3c61cef7.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 0x4425123a700385baf10ee6af0e23185c7acaabf5d6bb4e9e82a09d7290623a91. 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/BRVLS9500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37498962de64095a44ae46fc272f6b422c104297a27dd0e0ae819a468c49f2f. 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/BRVLS9500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33089680416b0bb6a859b2b0ecbdea64b6e83d4994fc3cb8031b2b5b98d23bf. 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/BRVLS9500591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6924de4c820e1e5c4734fd59232d71942678f49af3d411f0abd433a88fc6eb70. 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/BRVLS9500586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6924de4c820e1e5c4734fd59232d71942678f49af3d411f0abd433a88fc6eb70. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BRVLS9500586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d751350d38592dd96c153c10e1e3589b6c76abea1f048c35486c9a12e1f65c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVLS9500587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d413fb09df0a5cc9fae04e83a9c303da38685516191bcdc91f16d3e1241218. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BRVLS9500592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08d0e3480b67e663f050c33707e837b149c2c950ac82916a8d61bb6a3ad33e3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRVLS9500584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c94000f66894d073dd6aa882eca74181fc4f00ece3bdf0ac0e5d31fe0c2513. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRVLS9500581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4425123a700385baf10ee6af0e23185c7acaabf5d6bb4e9e82a09d7290623a91. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVLS9500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33089680416b0bb6a859b2b0ecbdea64b6e83d4994fc3cb8031b2b5b98d23bf. 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/BRVLS9500591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce60c7503a0f9cde3b1b3b203a55d74ae6ef58b39b9038834e9141ae9ffc395. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BRVLS9500593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37498962de64095a44ae46fc272f6b422c104297a27dd0e0ae819a468c49f2f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVLS9500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08d0e3480b67e663f050c33707e837b149c2c950ac82916a8d61bb6a3ad33e3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVLS9500584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6924de4c820e1e5c4734fd59232d71942678f49af3d411f0abd433a88fc6eb70. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BRVLS9500586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d413fb09df0a5cc9fae04e83a9c303da38685516191bcdc91f16d3e1241218. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVLS9500592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c94000f66894d073dd6aa882eca74181fc4f00ece3bdf0ac0e5d31fe0c2513. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRVLS9500581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4425123a700385baf10ee6af0e23185c7acaabf5d6bb4e9e82a09d7290623a91. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BRVLS9500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33089680416b0bb6a859b2b0ecbdea64b6e83d4994fc3cb8031b2b5b98d23bf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVLS9500591.