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 0x696fca4dc90ec63427df4cef5f0ef3d0c224f8ed52346dd09a25a15130c8b687. 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/24537b12-c2c5-4c9d-bf36-d878f39c665d.json and https://artists.proofprofile.net/proofs/artist/24537b12-c2c5-4c9d-bf36-d878f39c665d.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 0x1b61d8cd8efcec5bb2ddf28ab6448f3d7cba54753b3704804118832551cd6cd2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TW2497060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649183ed8a05b4504ba7dd74b7ea3dc57ec88b10153d6261482b1ea30f795ab6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA082422678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a97ccedefb3cdd74e82b2826d1f729c575c79d7d7c2741ffb0168a828f92df. 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/QM4TW2546684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc643e1bcfcf611e2feff856a06729144777ab85935285408d67d8f59a3ce1d54. 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/QM4TW2525963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404fe436139d43de3abc88e6e0f762c847593efa6a021ea940a4a5f9095f97df. 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/DGA0R2441537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ef89a68b5b20828b59628f7ea36dd15811dbf9b3e4086dca7f04c1edcaf727. 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/QMDA62474248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8697713dfc02193783ca1cbe658e633e69e31c26a14166289e39b1b921cc3df2. 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/QMBZ92496393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c496f4588717d43d45b368c2fb5d6d91c8de2f1c8e8895069026183422389d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92412025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c952656dad894f270f1471d4c7fd615363defe22e6ffc1911492c3c8e2deb9. 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/QM7282451206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaf2168e51b5cc9a276be709db275a83978aa3a1e858fed2143a480aaf1ae13. 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/DGA0Q2378049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c44a9439c782639be4f6462aaa8ea0ce8209ef42ff6a1441dbb6da0977af9e9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTBE2328238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f62686fa838f0078b97a968980a3d9303252b973f4be6c61c0f02b6a008c11. 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/INS172302360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac4f07e7ad1cff148267e78fa18ed65b2f64964402beca02afea1c4d18ef9ec. 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/FR10S2439680.