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 0x8b7849023e16bd19df15f9bef36e1d237c3446bfe24034d35dc4f98880464c4c. 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/70264775-002a-4739-9a75-14f6db706143.json and https://artists.proofprofile.net/proofs/artist/70264775-002a-4739-9a75-14f6db706143.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 0x85460f0e273b6a39f2f04992047cf9caf3f9b150bac2f853d281b72dfcd29a3e. 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/QZDA82309374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4744fca0f4829fed39c30688556e708a8c18e2059c95098e65c75dd1647fc655. 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/QZTAZ2429451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36be72b8d43b7c5e8127de67dfe0d76e80fbcc3fdd80b266535d0569e5526588. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFN2387241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8844952102fab550e3b91022e87d8c66f0f6cff15f824bd038aa711608db4818. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ782478339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990acbadab81fd5f2d25edbdf605c48405fecfff9caaab920ec117f7e2e9aafc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNC2551646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491fb1d2eec2875db74e2c088e6150f164af0df97c552187f1952f1363e46050. 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/QZMER2532531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e9e569cc986ff3ed1f48775da88783f110c4447e1946138fe7e74d8004c72f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWU2582705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b572f172fa4d54d8a27f76369dab6cbe6faeb3309582bee945a94d712b0d685. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ7P2564353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4512210ba368ba4e9fe515fe68e53f68dadbc62da3d03d04f6cdfe1f36e5f5cf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7M2585738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8f311265fb9112844daa30987365e388fca6ba0f29fc2c0d348b409a64ae3d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:46Z), 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/QZZ7M2585740.