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 0x6c838d8f6c44b6a8ba09573eaf960d5d4643cbee78e4e57d8489a9e0c9457a6c. 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/bb2f07e0-cbd3-4f29-812a-ccbdf294b1a6.json and https://artists.proofprofile.net/proofs/artist/bb2f07e0-cbd3-4f29-812a-ccbdf294b1a6.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 0x07040ca31d6805d7d0fca929d151cd543049caac1cbccefc8b03642746fba6aa. 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/NLT2H2200848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912359fad8c3b81789adb1a2933e7e6b97dd2a31a72e5278ab7d9c3d52b6654b. 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/ATGU62000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa862ab0fbd1a199e99112c05e5edc16df183af92fda68919d30b8724f7fc2dbe. 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/ATGU62000342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1faa689f5bba30a5071719f29210f53f5abce61de81f1a5384c36e2a3869d1e. 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/NLT2H2400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9797cc7b6ddb3440b5ca0cbadc7e404cde1bf8f9021dbe18bd0e0f3aab193cbf. 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/NLT2H2300745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61115ac5afab11d8f8fcb9f3928514f6fdfcf1ace31438b8ccc857513bd43a13. 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/NLT2H2200953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1bb4648eba231e004d914894d9d2672f49f7ae712ed51e602a9cc74a6e8cd0. 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/ATGU62000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7260c34073509ccf24144dbc13eb05c64af46803ffc1d8db1fbbf31bd2d8ba93. 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/NLT2H2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2869a4d02421bfc18182e9166e225d7529b0280ea22230aecb2fbfdec79b8975. 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/DEZC62132005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cb0a34f3e83de7a8cb4bd9475e242b4cf7be4541084b4d3177499654522db7. 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/ATGU62000334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6c2d438a6d1e1af116790649fc3011f55569fe330dfb72b9b74eb22c40044c. 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/ATGU62000340.