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 0x8bbc5d7517771fb77be44242a7936cb0b331e8f52abf95234eb96b8cde4b514d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea5784f7-109e-4237-9954-c00127313ea5.json and https://artists.proofprofile.net/proofs/artist/ea5784f7-109e-4237-9954-c00127313ea5.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 0xcb2cb4526d53cd38155cd253af9e4a8aa6ae97646a07a0d50a89f19669fb9fe0. 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/TCAFN2168449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ec79c557d0730402cb29ac4dfb6efc495ab1a8ec728cf6e1e44bd74672d702. 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/TCAGJ2240985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38807d152c749700a149852500af284f22c1c65c9c343403d44117e6cbcec8cc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAGF2288983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ec79c557d0730402cb29ac4dfb6efc495ab1a8ec728cf6e1e44bd74672d702. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAGJ2240985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857989b610c44326e16b33430a487a9000cca051c7cf74450f7030394445df9c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:52:06Z), 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/TCAGX2359811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf81169d4a3c4bbad8a64472833cfed1aeca88f2f208d060e77264ca1af70ba. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEZC62440386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f81b3565f2b4223dbe15726abc3a5c77a216842eddf134b50a09a778adf4629. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEZC62440387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000cd7b9dc9bbe1318f8761bd56a1b66040df209e46ac7221106910827f11a34. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/DEZC62413326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd858d4a6528a52e4c2914847fd117adc333a6edf1f2bbddd408b9d2fc6472175. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:35Z), 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/DEZC62406450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acf4ce5b84634cc3e2e406f8c59ca6a5207008d37d762db23ff719345cebb73. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEZC62419933.