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 0x79c0cfe1ea08de5da183acfd858d4f12d680297d57311bbb2faecaf16d0fb65f. 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/7dbcf1f0-23e9-4aa7-a1c5-62137cc9c4b1.json and https://artists.proofprofile.net/proofs/artist/7dbcf1f0-23e9-4aa7-a1c5-62137cc9c4b1.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 0xa1b30eec87cdc74043d21bb2438bebf0298049831dddd1149f7bda7d3ef0ef84. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BRYA51700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a269330f9550af27157069bb5dae95a296f1d519e233887f985c81424f2ac3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRMKP1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872094842e07c756d4c8055e6231186cc26a3444de61fdd7662ccb9dc0d84867. 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/BRMKP1801096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb833b8600eb14fbb711032d6af34ad66d829f8f2476588d1ea048490e01ac008. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BRMKP1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0863b5e6e46fb47d1f9749078276168dfc3a6877d63efbe38319f80c4416f4. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/BRMKP1802151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7520df9a14b92bea00116d7042573dbae01f1da1adf32cad57c2f7f9661445fa. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:37:15Z), 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/BRMKP1802153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb833b8600eb14fbb711032d6af34ad66d829f8f2476588d1ea048490e01ac008. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BRMKP1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454ff4d8dbce120b8c12a2eee43e8f92f728cd46e45dfd6a4d346a29e7cd35e9. 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/BX6582000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24886d3f05500393cbcf4edbde108027ea8841292f3620c5aaff143e5549a04b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BX6582000003.