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 0x9c5c9b05c6db5206454e392d32e73cafa4e05bd0b02770e0a3ed354562cb5b89. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca6a7dd3-0642-44b1-be55-3423c1e9c58c.json and https://artists.proofprofile.net/proofs/artist/ca6a7dd3-0642-44b1-be55-3423c1e9c58c.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 0x7bc142bdeb5d658fde587194d1aa4518f8556e580306a0ed71ded0a9e590a9db. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZRP42111285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6beeecd64c30c9d87180f0e571a4069751f74532e5333a72aac0434c73c8d90. 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/QZRP42111286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc1bfde07103ac86bbf5dbac657cd41cf37fff35b7c5aae7f3c158683bc2a1d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZRP42111288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45fcbf36631020ea68a378978efb0d787d6ac77c203cdf615c9afad5a01ccf1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:00Z), 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/QZRP42111290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a3bd099029876f68276aaa5baaf0be4bf5b879157bdd15d455c0efdb206406. 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/QZRP42111292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21bdae3ef3cb103183e1a1441d1373db1271e10ec637b340df7c0a00c99c276. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZRP42111293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2b9da7203d6945d81c31c48c52c52bd690d3db356ce7b86b696973def5a391. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:39Z), 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/QZRP42111294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92d6622847794692f92cf08750630ed853e9fb0a11962b2eead1e263f93bbf7. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZRP42111295.