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 0xed49c8d271881aa93fe6ab55f262b268d705c19f17560ecb6e909300d338d891. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac3fadb2-d730-413e-a594-f4c4c23eef32.json and https://artists.proofprofile.net/proofs/artist/ac3fadb2-d730-413e-a594-f4c4c23eef32.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 0x42f75b5a46e6d421d1fab8a87809197320cadbdc4c1610f924e2d360b2eefec3. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GX8KD2271068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9f67e364f78714a99cc0e1dd67dc703c33f3ced20b2db053339915fbafa2b4. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFV2431186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a366e7205a8feef8b0856b8e606cdce368d7f98393a6b7d029b972e22994bf. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFV2431188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81e726ae008ebc229b8835083893fa5de602c9f75781e08699c5b033f86f376. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:33Z), 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/QZWFV2431189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe797bba3be222da6f61c30a9f47800b8add91bb6fd48f2fce452fd27ee9f28c2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFV2431190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e1d6eec05b91476516b14d7efe20555ecd8385854f8314a09b700aac452066. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFV2431191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf726a8ff866ad27e895955ce8aa970328997571102356ffcb85dd629d8a5dbae. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZWFV2431192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0b58f89a02edcb71bd167412b4a20b312b3b34dfe69d27587dc24ac5c59b23. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFV2431193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235c723db085bab7ccd8c83249d660b4e7070c76a2f7e1e0cd61788e718816ac. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZWFV2431194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d4721da5f378d8c6fce505b6d9f57c4304060ae68c9911c8937202aa1f124e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBA2547162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb9e3690d0b40ae2f32ebe29e0316134be19c36d313a05ff17296aadfbbdf8e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:38Z), 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/QZZ7T2569048.