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 0x286ce83ab05c33344a96c68e7f89c9785451190fa6c28eb6a1102bbf8ed46344. 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/aeb82fbe-9e7d-484a-86a3-4e036433ebb1.json and https://artists.proofprofile.net/proofs/artist/aeb82fbe-9e7d-484a-86a3-4e036433ebb1.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 0xb8d62f327f5e7aa13f98a3a08f93018b53e5efead525956f13e72929cffe6755. 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/QZK6N2432063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb821bbf7e6b5097dd328e691fbd0763b97735ac86d803809ce207de3ceed6f6. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USANG1920427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc223c117d18f779b0d3dc1b178111565083dda72637b39bf61cefef4c08ad2d0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES92458185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09865fb1c2fc9c525ab255d54f01ab89c4ac8dc291c80c05006f4e5b044f5bcd. 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/QZMEN2416258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c3a6910662b8473662e279eed4042f9cda8dfb511755f668c94b8e8ac88c1f. 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/QZK6N2483668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec426b7c58c416185533eb0417d230315de9493e25e8f0da2023eedcc2583f48. 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/QM6P42148320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5f8a108a2542300a1a5a71aa2e277c5c09cda8d6574f81f440cafa066485e4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWY2338932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f6909889cc1b3aed234ca9fd0d79a6770d80486997c25890c7768f83de84dc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZVEM2394661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6757e45a25d8766401d949cf39c1e018d3d9d57a917f34072b6e5cc3c458ba16. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:21:24Z), 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/TCAHN2317186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb78504e0b61ac129c43a17f630348fcd54f9bb743b756ff2b811d86e54e0d82. 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/QZVEM1883420.