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 0x9060be1a5b63fb65b93122d0d42822fc5fbe196851827c9886843853041584c8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d809ec90-95c3-440d-a7f8-acebd4654ab4.json and https://artists.proofprofile.net/proofs/artist/d809ec90-95c3-440d-a7f8-acebd4654ab4.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 0x22bd209692fd1979fd85670c59102cf713639aa373f4399301318e484b389261. 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/QZFYX2300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1980dc4f401305360af1050480f37119052ab7909049d99fc1c6f3bcfd381aef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN52222739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddd927413d65d9260289984ed56afdfd451e5f908c42d67107412b414746faf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTLA2238720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9683b1b3e5e0acf5f356a2a597147bcbc3ec61226b0a4c9dfc2782e9f9e289a0. 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/QZNWQ2135310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2848e80ea33ba4586302d1aea9fd91cfb6a635f69a4c2caf9e6c98e2327f0a0a. 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/QZNJV2117400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4df03b4ae9bb1aa3450854dcc8f0a694d9f019a03e38a41185dc7b8b856db1. 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/QZHNA2184001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f99bb8b5500bf8ac9056282819e9d7a153fe35b2acc96cbec25053ace6686d8. 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/QM6MZ2172265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87be2efc65852413071bd4bd636b74fcd0a106c204c151b2101efe770e705faa. 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/QM4TX2167979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb068016d9dae5b4c58bedca6dabf9603efa619c0cf152f8e91725e6a447c0c. 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/QM4TX2168752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1c687cc7e39fabe5fd99ac89c2d307a9f3b9f1a5c23f505a8a0b04341fb2ab. 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/QM4TW2172668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade16d1406de192c87f935eaeeaefc376dd3ed3883059122612225aa2ad2a795. 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/QMFME2051244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b0ad83561fed4e91ba134197bb413fac1e4184d42963cfe62a542e42f4a38c. 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/QZMEP2063144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379348055dbaa448078c24a74e1f9492a549dca71ab6107194f42b2a00cd1683. 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/QZK6M2012150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934d1ab70eba70aebabcdcf2f0e01af6731da1d6e32cd8cf6b3536856e63e7ea. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES62042894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9888fb256e0d27cc335741bef69a8c6e18211224363f89e20f0a60069a39bc4f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWV2194983.