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 0xcdab2ed095d69281a5653f4422c81c28966e6683d161c9d27a716c3ca9bc8ddb. 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/69622051-c221-46ed-a784-7fa8d2caa155.json and https://artists.proofprofile.net/proofs/artist/69622051-c221-46ed-a784-7fa8d2caa155.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 0x292050deb64c8915813ee62690c3776975dc43302035def9c447dcd43133a41a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/ES71G1948258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d78b21f151a6d555b88bb0cf3d7c19073a691e12991ef75fdd50354e43e3b6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM4TX2454330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe63c3b13cea645e7a7217cdfb1483dc854982fcbcea01533f9da8516a4abc4f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2275575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c9d8add59899a02f9d9412c3239734b05c1a9219e49221699b734e1e7df767. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB72285616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b73a46b20527a153bd33292b8493031702f9ecf6c10b6f2994b62a1a1425ad. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:36Z), 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/FRX202361293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7935601f6c62189e2a5d40303ffe7800197785991e3ff985e59b9db672f43bc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:55Z), 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/ES71G2315766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111abf9d4ab8beb503cf165760fdf52261b533f3d1004ffa48e9625d7567463c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMFMG2370301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c6835ecd8d2e46d859918b999df84cb8e32f3fa7f6cb90427a09fa6d62934a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6MZ2425502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da1ce7228fa129bdd66f9bced4795fa1c992d0878e1e727b8e94643cbefff1d. 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/QM6N22405177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706df7fe45fa28dbadb5efa4de9305a224dd7cb0e2e8a8d358ccebfaf7761ba1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BK4DA2426128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76eff878cb1c55167c619aa87ae83627febe623fd83fa5f5b4bf74efde8a7d0f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QM4TX2507330.