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 0xdd1ed14b016b8bd052e8b4bd50d6761b0f9b4cbc93f15f347f67b63cbafa9d29. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff9ae007-fb1a-4976-9683-a708f640d590.json and https://artists.proofprofile.net/proofs/artist/ff9ae007-fb1a-4976-9683-a708f640d590.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 0x7e4159a836cd6bf081f99549e7bc29b64ebf28664e1072a298a30db9dd071885. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:36:38Z), 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/QZHN52521450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b66b6b7031d574e3a4d4deeb8f73f51beb2bac25617dbddbba8a62542ecb3e7. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZHN42520670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c8b6c6312be850cbc8d363de8b712939bb9b328a15fc577907c31fe0af0e23. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6M2568348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4d503d452acbbcc20fd2b7ecdfde6495c842310a1fb4e6ff595c70ebd5a3a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6K2576548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0683c6b985db6889983b129c489e44f31148881ecc4b1993f1e04eca6dbb968. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:49:28Z), 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/QZK6F2593171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73efb1a5e85e7316f833d9ab157019adba1cdd7acb3cb6390efbba56eb55c37. 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/QZMEQ2516814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad1b3507ea09f429fbe32bd19d7722a7da128d666560fd554c4df663ca7c312. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWU2529793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa549b909d8d8402c62de85012ee69e964cee1a5da68f6872fea1751137a55d19. 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/QZTAX2534640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bf3d0f121f8b2ee9bf9ad1a8df6e10c54ad89e4cfca111c5b35532efe080f1. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTAU2566420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf265dc811d9b122446bf1d2d44a405825e0229cdcc209b2799b6af2894bc16f5. 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/QZWFX2568479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f67bba177869da52cba5f0f086347586c49ca21b1cd7828f9b5e19381396c5. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:46:23Z), 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/QZWFX2568480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb6fa0aa0a2ec5fc6938c42e065748d7607d7b081c80a1415aba6947c62f4e8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:30:48Z), 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/QZWFX2574747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde1e83a516bd99981e3e0da3b3e697cbacdf87fa3af00868d1d93ee885a28c5. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QT3F82576919.