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 0x91381ddf3633e88837a34541d575823f5ab58a87d41208196a4e3d85abcd4e9b. 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/743a644a-897f-419a-8221-47ef3bbd526f.json and https://artists.proofprofile.net/proofs/artist/743a644a-897f-419a-8221-47ef3bbd526f.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 0x5565cde49d28d57c45e03f24106de68cf69f32a9f413a77bedb20f42b15166f9. 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/QZK6P2319790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65ba9ff44d8c6d6907be17bcf952fbfe707467bad96239ae7ca02ac253b4ba0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:50:37Z), 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/QZTAZ2268915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fea31386c1a36b479ffa3d4a7ae990b5e1fd1d9277b998d312947b60595ce7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:28Z), 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/QZK6M2460588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a07264d2222ecc177a1d1a2b9f4deec102001119fccc36f7b86a3cd95e0fb71. 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/QZK6H2410071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da4a24757c1d3c7764dab33048d76a2c3f155a6d7ff233583380b822cd731c2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJG2502386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ef5ac8f64fb8105649784e5526bc5bcd24e9686b8f478baa0e19065f7f7153. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJN2500195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae0869f70e1b64e8e4b01cd05a56a79b99836ead71d604f6d6f4ce9be4a731c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJX2563105.