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 0x12987fe0951013fbe86d07fe26656b89fb185f65e10f1c92cc86fddf03d1f0c5. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2af8f19-c3b8-4646-b712-a2c38b89a8d0.json and https://artists.proofprofile.net/proofs/artist/c2af8f19-c3b8-4646-b712-a2c38b89a8d0.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 0x85b5ba5f4e342ec8406f7f65a1c70b8274ec01bfcdfecbd3d276d32ca0e34fb1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXH2J2583988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a25ee3895351fbea4ebcfdfa3fc37de4c095fc99f98e5096e808b255d17010. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:45:19Z), 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/GXHAF2503248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9588988f255c9918966a957b987c71c22b563c016728f53114e484bc0f98a2ca. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/GXHAF2503249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3266504877c1a1f24101cd68ae5868d4d7420c605e624391e53eefe2fac16563. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:04:59Z), 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/GXHAF2503250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8da5152620f0568ccc806d1ff186b57a68b668c34b68e4178e687583d0e9ff9. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:56:35Z), 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/GXHAF2503253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d005bef193a809a9d0aace27da104a8586f9b22cdb1e4843758d9e92c7cd90. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:04:57Z), 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/GXHAF2503251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f57a400f4a961a24798f7312c73f676d5f3fc86f7896c8e05757241ccba3fa7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXHAF2503252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefd850655b92657f881416a26b95eea38d209b4753f71c8a2f2830b7011300f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:00Z), 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/GXHAF2503254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29298ca76d5eec205e8809558cda109858642c33549f5d99c5fa147255fe439. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXHAF2503255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6388b67c105953b5f4d5a91b899d4f0af295cbd2bbfbe93fc7dd957faf60719. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:19Z), 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/GXHAF2503256.