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 0x25c90b04d8fbceb6469b6b7a37d48b95b20f38d86590f602f46e8a0f030b26c4. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cf22275-4231-4331-93ae-291a1853140b.json and https://artists.proofprofile.net/proofs/artist/9cf22275-4231-4331-93ae-291a1853140b.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 0x59adc5d6dba5fb4b802a0ee4e48da43db952a0a31be3db93bb6442d72b7fd8ab. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNJV2587189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410251764ae062dacd463bb029a35cdc9a6798cb6ef563bc2e15045782879efe. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNJV2587196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ff90a035b8a6c0e18ccbb2d5f438d153377545332f720bdb1b53399fc132f7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNJV2587197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6408b29f5a1bb310af0a560f496ac867b63527e09aa4d07f90cf723f19427c45. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:21:00Z), 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/QZNJV2587198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815a4871d1bc799a9baeed8cfb2fb5d75052d6f74f3c8d945cf05d7578506c6a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNJV2587199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660c4d6e030d9de6d22de3239c22ecad9b5ce1cd5a19be176983445dbbb462db. 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/QZTPX2568741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572b0b35fb896863770123e52153c4700d85de26db5aed187cce658e6fc7f536. 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/QZTPX2568742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5769881ad9c9c258670ade48ab24881e7c127837219b4a907e5aae601eaa990. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:11:41Z), 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/QZTPX2568743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109fe92528984fd7bcd61cefff86d989dbe89b132ed3c2f43b2602451453380c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTPX2568752.