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 0xcccb38a1616e35a192e4af42f11e7e03416d25f614303670ede560649a5082d1. 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/fd56904b-f6df-4430-97cb-104b72357e7f.json and https://artists.proofprofile.net/proofs/artist/fd56904b-f6df-4430-97cb-104b72357e7f.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 0xaea890a63c53a7a001a24da1943197492b02b0a648942e76f1fcaa884b0b00ed. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:03:56Z), 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/QT3F32479955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8088581321a4403dc29311ec76ea4402eabe92b9efb18017247c09a06695c8ad. 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/QZFZ62588012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffcfb8746b600b519858f8a91e9f37fad07273931b7c41ce62fdcbe324cc47c. 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/QZDA62524661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25176fd66b209d9117bf86bb46effeafe9284ac13af096efd1201a825d3eaa33. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHNC2573330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed25b4d5457e470977819e06bb90dc4155784b602506989062698b222f371fb8. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:17:48Z), 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/QZK6J2531426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48b2b6c8f82358ad22473e6339648b8b0f64ae999b32f805f5892a68646da82. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZNWZ2505669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65b91e702eb621176f7112f5408c8882c38e030e56ff2af68144ef1e8a83198. 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/QZTB52566544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8477da81604fbddd918b7fae6b52546b110672220cb53ea6b3747c648f6304. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:06:51Z), 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/QZZ7U2589853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c969cfad808559f9280d8cef9dee62b60342fcc6e320e7dde146c9d91c8af80. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT6EF2564957.