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 0xa923d0f8d45fbcefa7bdac430ef77d3b6ee756b75ce450fd6112ae7f23a6bceb. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a05c3ded-ad83-486d-8ef6-b17a21c00e7c.json and https://artists.proofprofile.net/proofs/artist/a05c3ded-ad83-486d-8ef6-b17a21c00e7c.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 0xed4b5be679aa43442f8c822ed75e3188d716ca8720360394ac393fbfec477836. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/EERD11500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03759f2972e565891df6db66dd426deac76dc8baeca0d8f124c848d9fdd6830. 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/EERD11500004.
Viski Enne Hommikusööki / Whiskey Before Breakfast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc6a4c7e468ee16e91265966e32443ee7a891b9e11a86088e64b3039830cfc9. 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/EERD11500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd262ca51dd463c301f201bfc1d93f9f7c403c41f4c26b7876d0e45281a37769b. 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/EERD11700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7db9cdf80493180bec2d37f600332b33b1fa2bf6bf1d7475d3be38a8aff4b3. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:35:59Z), 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/EERD11700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf51254157cb61cc2fe7a680d5cb8d4b738165411837b96ecbeab2c51cf1311. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/EERD12000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17894826af30c9ea4b443ec98acdd3912d00f6db45e07d72e5c2deacc752fdf7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:18Z), 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/DECW62300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13331f843ba0ea3bb3ce3e6c4c29ed8d5498bc502ebd6d6a2a77227f85950a10. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DECW62300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbb1ee10e1e8a6030dfe9877d5277b9845edb3d7260a98cf9718e337fbe253b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DECW62300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920e074e7f1fbf4cc6c56abe3ff19fcee022e71ff891683b6138aee7eb75ccc1. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/USHM92502157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce3369396096a1a60efd2a9eb6efe147d6dfef487e4eb55cea40c13766c7452. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMER2321665.