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 0x887af1c8d5d05f8d85b1ad0a85d5b5e0c3ed7ca5aeec28a4322f7fc43f01fa8e. 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/58acf450-f3aa-4f89-9b88-847c0abd4903.json and https://artists.proofprofile.net/proofs/artist/58acf450-f3aa-4f89-9b88-847c0abd4903.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Yearbook (feat. Instupendo & Harry Teardrop)
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 0x79c999a9158cd46e30ebc60e04ff79a60cd21642806a86bcc28395bee415ec58. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US4HB2000182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5631ddc060931b418fae8ffe25e5c10113e09b70396eec987e21daa94123291b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US4HB2000222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29389aadcc30e5e03341670242ab65ff06b23fbce963639baeda7a9299e8cd93. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US4HB2100345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06074369063c49f67d3a1ad52a3a0015c3a733b50c619b0acce1f5b3b4bcc4d. 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/US4HB2100367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29389aadcc30e5e03341670242ab65ff06b23fbce963639baeda7a9299e8cd93. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US4HB2100345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7402eb392ad509f7c3b4bcb5c84c0020b186f44d357057bcaa0b8a13d97a4c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/US4HB2100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f176d9317ecea0ca53fbeb455acb2387090cdea70d598bce21316a52cdb0c2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US4HB2100339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a081079bebdb031614c3e6065b92e194c0145174d992d6ae413f91b930a7a3. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/US4HB2100365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6b0892dd5fc1d37f45501d6114d9d9103e02929ebcbf8fd4d6f7ec851da5d6. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/US4HB2200511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c18637333929dec59dd2357aa98acc045797179a2df0b1d4a64993bc300e7d. 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/US4HB2200611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5748bb7462af7c1d56f3b376b2c0bf017c412e72b61ab3fb2f89546b192aabe0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US4HB2200607.