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 0x7ab3a4961d7e162f012ab6a5de288784bce78b53e41084c1f45f1bd94e64029b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bd4d830-ab7c-45ee-86d4-8a5d36e706b4.json and https://artists.proofprofile.net/proofs/artist/6bd4d830-ab7c-45ee-86d4-8a5d36e706b4.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 0xa5e36df7847382a58cb21784bbe79e37709fbeac207e013f61b87d9505f11946. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCAGB2219258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfad25291ea64445e111cfb5fdc795168adda2aa1a854f06b020fed57a0c80b3. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:22:47Z), 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/TCAGB2219267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543d33974b0735fe76830700501ea27c1e5f2a666e067e1e8caaf3697a606a70. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAGB2219270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f104adb04d0c9ae082ebf95c577f3bb9d8463f6b447c5a5b483c8e83d8d234. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:36:43Z), 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/FRX452237345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe75b42098bfc4e5e6e4e366425de4ab238951aec05942f0e1b705f17de82d9. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:51:31Z), 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/FRX872279140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac560538577a04ee01951b53d68905fa4a05c91ad7d3fbc0443121dc559de39. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FR59R2371876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b109f30563277f833ea2f467edb37f0f8cdf39c780b59ba4b7b4cf80773e58e. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:40:04Z), 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/FR59R2371881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6723efb3652d41409701dd7a37873fe98cfd9de8a719bea2ab999b2238c11e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:59:05Z), 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/FR59R2371882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b75947ed239c5f4f58b35316b49433c27753febd7a54485ab2866fb584f6db9. 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/FR59R2371886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79c93c0edf275b53855dc4a3cb4122df529928c0d6f9c146cbecd726814b209. 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/FR96X2509640.