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 0x7363fa24d5b9561cd635d26ed068a23224827ca02c375c370ec1cbb1fea86aaf. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3bbfe20-c1a2-49b2-bcdb-e145df92a13c.json and https://artists.proofprofile.net/proofs/artist/d3bbfe20-c1a2-49b2-bcdb-e145df92a13c.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 0x574e681b1145406db426f1b85a181da77adc4c5af1ee35806e3d3f3317b8a256. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE5BU2338462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8d355e26334dcfef9e3ff1bedcf5d2641041adc03ab1ce2fd5b5b86178be74. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5BU2370126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdcce1045aeaacd449167fbbdaffb8b413ecc7c7698313c91adebbc9d42a5bc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6I32328640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8bd2013c1a844e671ad44be581286490bd90751f3f9fdb92efa4f103d96d96. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/SE6A92345849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc920b9c1244e837d0a5f3692888f43ca0a658ca6946f8be76f855acd26f8b5ca. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE6QE2415919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727b98cfd9a49913a7412192a0ddbf03f5cd418f4e5aeb15e2b5b894f1b6ee96. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:32:29Z), 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/SE5752497615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a04be611a5a5bc9eb29241372289fdb170bbec32e28489e0121c0978e9c9df6. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:56:28Z), 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/SE6QE2440380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8a2e384858fb41d1b805190b89ec6662a9ad99b3281c2dd1e2daae4a1f24f1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6SA2410391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc4f4874b3b66901abdd5eab98326d177d0350da8358bcd4dcb1f0df36baf07. 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/SE6SA2473753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aef5a052576f95c4bdf0acdbc7851f0d66cb04843f45a5a8512ba00e11c354. 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/SE5BU2590795.