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 0x937ac5ecfd7201143ed14c815cab8a07b48827695a496db7fa6006da285ebdcc. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec1c0605-1209-44ab-a274-5ec1fd969bd9.json and https://artists.proofprofile.net/proofs/artist/ec1c0605-1209-44ab-a274-5ec1fd969bd9.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 0x170ae3fd0f4e568478891bad8c0b9fb012001b2bbe5ddc05395395ef849f7186. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZZ7Q2436181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d9830060f4c398cedcc2159cb50d63c8686620bf207f26e0767188aa0c76e5. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZZ7V2485841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2acb97d8fdaed345d3dac16d552995773688a6d52291beccdc709bc904aafd. 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/QZZ7V2485843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fa15f96c0766b24a6190695d274fe199ef2642c42ef24875a3b970ed0f687a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT3EY2470818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd420c80aaee26b820be42ecaa76ab7657735b6373231b34a5f42d2973b167175. 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/QT3EY2470819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96da18a7c3810b61a2b17b75453bb9228e6a0abef324daca77c12ee810c29931. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZHN32516691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c636daf2a70d1361477a7c23ee12cca39fa83dfe7ea3b80c8962044bdf3782. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN32516693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbdd64655f7efdd4db8ba025a998d150f1d93f4d3d896044c67f6a803bc6251. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:43:26Z), 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/QZK6M2534791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7a802a11f4e9c11991683b39de4f7e3c38ce7afeb1e15a401793c85de0cde3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6K2595372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fa789efcc4716d988d95887dafbb5c49b15696d3bbc3348f2b50e094dc04ce. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:04:26Z), 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/DGA062570570.