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 0x85e8e9046e992f1f1c0dc00e1e5a020797bc7b4e5cba21a2fa70ad42dc128b2d. 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/2961017d-3e4a-4089-a3e2-3d05837463e1.json and https://artists.proofprofile.net/proofs/artist/2961017d-3e4a-4089-a3e2-3d05837463e1.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 0xc216e5093531b94f9c5fd12db45a7c098a43ec00aad5b7a83e63946a8f008318. 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/QMGAC2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1950b754204fe960882c6563a0c1ea11c9f35e9e55a872e0d5a4468b89f3b5ef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKW3Z2400683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78988526a3d58c355452f0a3c53c04af754d266e6adda5542c6e8e791cfc9caf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKW3Z2402206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca90eb8655572e6e5269862a6fcdcf9341f602de2722fb4250a1ff51315b4eb. 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/QMGAC2400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2343152027dcfc4fcbd8d480651fadcb1d45bc32500218975985eefcfb2b59. 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/QMGAC2400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cb1d9dda6d7397c34640a85f90107366e83895ed2c067a85c9acf07ad72976. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMGAC2400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5917c5cc5e7bfa001d55779829d52f2e9e3997988ac1fcd53d2c0e47f21f0e8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMGAC2400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cb1d9dda6d7397c34640a85f90107366e83895ed2c067a85c9acf07ad72976. 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/QMGAC2400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18addfab2f9500542812201138db776d96e59345230422002fc7a1c8e4c0b9e. 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/QMGAC2400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc216e5093531b94f9c5fd12db45a7c098a43ec00aad5b7a83e63946a8f008318. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMGAC2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc216e5093531b94f9c5fd12db45a7c098a43ec00aad5b7a83e63946a8f008318. 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/QMGAC2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa59b422fa8cb789d7285b9e1880830f98e9690fe8a5de1ba0afe437ffad07d. 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/QMGAC2500430.