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 0x294da894ad4307078466bb47fb0e7f1d1e3299900780394e6cf6957dcef4bebd. 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/bb59338f-bfaa-47ee-8918-1cd615b9e05a.json and https://artists.proofprofile.net/proofs/artist/bb59338f-bfaa-47ee-8918-1cd615b9e05a.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 0x33031b360162f1263d42a20baa445c45ec5899365c14c152f1eb9b30b5eac781. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM3DF2207814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996b52d3deb2dedc0312e82fcd8c248b36fd7fc2c75c801eb590e89e667ae5cc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM3DF2266234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77532ac8f5acb807cfcd1fda9e29bf9128d9aa20014e8a80fafc88642368931. 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/QM3DF2280599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1329a83d014524dad2a6daa0c2c95e78ea61962d0d1a9b300497dad737f5d948. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QM3DF2265655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34fa4a57109add9dee9163153abb96e2d8416472ba717c095cb426daf7b7b70. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:29Z), 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/QMANG2211863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0064ca7e701176b3006a6fb43e5cc6393cd7c27e3260550528c733f37595fb39. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZWFG2354494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085d2f381d63d9d7d343d30c1f2b2c590504668b96949b653c1478bdd81bfb1f. 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/GXBAV2432926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da8a42c8b927bbc18a0539c7d8a5ad40f7d9e1bdddaa9bb75709afada6b875d. 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/GXBAV2237613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ec2eba0ad50a01c57bb231f7d0b49e3584e485c1826b9dbaf2362d55b54ecc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GXD7G2437305.