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 0x4c03559cd3966e4d45434d8b870e796c83b89476cb69f325fdf3c268e4b1b851. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e8ac3fa-134f-4cf2-b318-303d34b7b7b8.json and https://artists.proofprofile.net/proofs/artist/6e8ac3fa-134f-4cf2-b318-303d34b7b7b8.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 0xf70c22de57ce07f2939f975b9a5bb1427dda8a6c73de168f02c31bced38ec538. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG731793475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70c22de57ce07f2939f975b9a5bb1427dda8a6c73de168f02c31bced38ec538. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG731793475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0b1f5d06818b70e2b37af451a9795077d9f4d7731887fed4599ca28ff5d9ae. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWDL72205015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d9fd1013c8a2413834ecff4be2112d70e64dc8c8cbb47308c2a9fd0ddda940. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ632201039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee132bed7812acab289de887cf07fc85bce94c9258aaa881bba9559df5a55439. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKG732276925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d545c09978d5b9f219031d6e936c7b25bdf54954f59e30e0ea80344d522fc4e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QNSM12404121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9eec591d22ed129cee80096e9684767cff50849b5e170f4b385cb304a80beca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QNSM12404123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8106464560996d632ccaa3c8214211988000d8b261ad768792a8a3cb2f1307. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QNSM12404125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f73488645f5861b53c1e7d2a5c113aff0de9b81481be4698e5ba4eebd391eed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QNSM12404128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a089e028dbeb831a1f0a2e92291a61a43886849015eb5eaa0d52b9e9681c00. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QNSM12404132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22b8547c58a15865a991808aa4dcec670680e5a7f276522e755a192af9a8879. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QNSM12404134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faf9226d20f562e436ff8ecaffb11a3e13063093767ef0ee264d214d21e237b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QNSM12404137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80249647b498bba2c993c2308c2290d78efcdb4445222065822a8f79d9e45a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QNSM12404144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec5e6c7c499505d8a866da45c304ee9cd83ce0e9a6bf9bd86bed902867f737e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QNSM12404122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c28a83a712c3c689e1ddc9336dbf2409ea000e969018843b467a725d654f285. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QNSM12404124.