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 0x2430cae799290bfb9da4066097658bc040f6db3c62cc8ecf13aa5e24c0b487e5. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6209167-8ebb-43fc-81da-f2e8db27addf.json and https://artists.proofprofile.net/proofs/artist/c6209167-8ebb-43fc-81da-f2e8db27addf.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 0x9f4c0188b6059b9125dbbb4f6225bebd2389c57096b3b441881da4171141032d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:25Z), 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/ITA882400815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e2f7c8558177dfb999707c8b427f2d4043a98f296d76630e30f54c68f3c5ca. 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/ITA882400816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fa90c589e2e918fe4cde59ccb9399f72b6225fae2ad16ec935cb7d52bedf46. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITA882400817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772560bd2f125f9078455450c1457f6dd2c3f89ebd12287b14be43292713ccfd. 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/ITA882400818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a921ab31fc66e54360c62127d257252471ce8e0960217a2d1fd8c16f809897c. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/ITA882400819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e9da26b3e1b38111a80887e7f5fbbb0e1682062d31dd28e5afb5f6236e8d56. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:19:22Z), 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/ITA882400820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c56dd5ce32fcc21ec8d2811df98390e708807129438894e645141fb95381e42. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:37:19Z), 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/ITA882400821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe16221bd6e9aea46088ac17ba3acce7db7e6c625a85f81e06ac87a4a56f1115. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/ITA882400822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead2aeca29ea8028ebf38d8789e020a4eebfafe0d690cf6f651a9da78c2c6be6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITA882400823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e53af5595324aa3439f8e2fa691e9ef9c9e710f62d6d0a14e12e895b7cb8f5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ITA882400825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626c00588d54e3d8c7853f2bea8c5c656e29d26c7e75a2f1c3fcdf7c2028eba4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITA882400826.