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 0x2c7ac51fbfb9b2e4c9de7af7968c9ba3c5cd460aba0b714a3d0f53772b889e04. 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/3696b202-068a-474a-8f74-8840aaad9724.json and https://artists.proofprofile.net/proofs/artist/3696b202-068a-474a-8f74-8840aaad9724.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 0xaead95824ed05dc294748085f0f348ad5b167ab75d25294e87471c02f4e0a100. 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/GBLPF6712604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117547d004957dc45f55acd103c72fb2afbdf542c9a42e5a154fa13758d23afc. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GBLPF6765975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd29f9d83e832bdb40152043cecae5eed11e72b6c07d288a95fa96c10857cd0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:22Z), 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/GBLPF6769430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ae40d9290af24c1038989cad15041439e7bcc96f2b4c71e698d76479dc68f7. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:46:04Z), 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/GBLPF6789970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606fc234fa22ad4f038559c88e40e0cfcd2dfd407cf94fb8fc24bdeaede10b79. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZWDD2417663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f4c8b97c0c3b1df2c9d839924b7e7bf8ad5a9a8cb848186d65ea4866f4d19a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZWDD2417671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119f4306362fbd8a9746e091f6ec0369e4e6d3d57ca09a95a8c812fa3cb6e5a2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZWV32442802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b60735212da780f2a4d0ebf8e428aa61e4cc5d0f0c5305d480456dfb065b0c8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZZEB2411238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8c9b5e6131d4243265b760e20fee1299401e1dba150fdff84ac9a529cf269d. 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/QZWDE2536436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c44fd1ed1b137f8593d61e9fdc4908c31f379574056ac9493ef30a3ea4e559. 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/QZWV32554195.