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 0xd4401fa13eb82de04b4ac161b2e879b6a9f2278b7ce97154c8f3189705fdbb13. 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/4dc75ee9-0c4b-4417-a4ba-cdf9658a0880.json and https://artists.proofprofile.net/proofs/artist/4dc75ee9-0c4b-4417-a4ba-cdf9658a0880.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 0x2943c92e3a3e1c946a8fd226705a44f8e217cc3b619c12af21f1612a1d3ad40c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:58:18Z), 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/QZNWX2414844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd67c6e9a8a310c4feb852e02ae95b13cdb0bb01c64e006537e0dfa6ab7b6d7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWX2450135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcf33a2db52d4a1520caf4f66bb3b1677ebdf4485b95a208480056e216b50ad. 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/QZTAZ2410262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46d4181691fcb8628e5046a0c1845afa59dcc3549835d5495abd2526f9b6c1f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:10:25Z), 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/QZTB32443077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0a6f27935689da09cb1dea9426e9f9a28779e4ae8225409766d52c49106c9f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB32445764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb553ad896733e93cbe85d5ad3d5a22625b0107576be5f50f50a30c2d5852f2bc. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZTBD2403038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc47e9a72689f1c4e91e6e6e8902ec583135922a36694f6dc67cd6a4c3c7e1a9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFG2441664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e946e1c2bc7f2251f4bb1e603becee0f536db177e685d309508a1110181650d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFV2419022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73246ee2d5a4a7f7b052bde3efe1732e90dfd9e54bf5c979ea8ee0bde60ad6f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFX2411921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e946e1c2bc7f2251f4bb1e603becee0f536db177e685d309508a1110181650d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFV2419022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61b52205e40c11117858bb26cdaf88b311ffb73a6ee224cd62d1a8877e59b77. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ7M2437478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4667710b9e54d5ea83b094dd4cf811c75d4a97d0c5d58058afd21d0f8807672e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZFYY2532426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c2fff5c3391e7124499adf061f85e1cd4fe83c9b66fdaed191a90b72ddf545. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYY2596445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f3bff81f4b280cf5f3cc4f8cc8d10d3ee1b77aacc8e78064c4c1743fc52a00. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZFZ42573272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33a7d7beb8dd4f740885dbb6656ca0f657d87da50f37eed963114a4045ffd1f. 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/QZDA52528674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9aaf9448ca76c3be70c39973b4fdb2aaade8990713aca71f9e9e744baf4809f. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZHN42549453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14350a6bad7ed99e2500967b97cda476eb7b0a37308db7462519bf0ad25e580f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN62558022.