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 0x0cb22a04107672a82a92d686bec686f009e23b106f7045c3bb8182ac81a1149e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4d54f4a-3c24-461c-9017-c6c0dbb192b8.json and https://artists.proofprofile.net/proofs/artist/e4d54f4a-3c24-461c-9017-c6c0dbb192b8.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 0xa6ac394ba9ea6bf31b685c74d4c1e1f91018e9fdf566517b86e7c3da6cdad20a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USDY42171873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912587a4983aeadf656687781d1d5cc381252dfddd1fb8af920f72db4d71624a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USDY42270793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c4c5f6b5769ae379ed867102dc4ad4df4fa43eba2cc2626a43f6153d177046. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:22:59Z), 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/USDY42270796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fd7b0bcc90f05a9cb1454f1b603eb9e26d2425d6ac176dd58895456b308d95. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:19:19Z), 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/USMH92351988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676adf4c0d4db61c5aa9dec4b81e7ccf828c2d3cb1f4e2702c0d42dd1a1a9226. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USL4R2353195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd00592f8a29cab069ad6489f990ece8bca98b5c695b40974a4bb7b5042a675e. 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/USL4R2398385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a0558a36bccfa75c9e4fca214b644913e963c38f5f49f4d41616a63d98ae15. 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/ARIF22400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290fd6230a8178f155d060a4afa87affe541b432be9114cc79eefa9f083b2b7b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ARIF22500001.