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 0xa212477085bde97b2e9b8b06ce17ff97e7367d865d2834d1c7e6b9407ee2fd1e. 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/46a247eb-711f-4deb-a05e-314e65cd12d9.json and https://artists.proofprofile.net/proofs/artist/46a247eb-711f-4deb-a05e-314e65cd12d9.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 0xb4da317670d509df44acb16081f5a694f75b3f81d44b525a0caf7f9b096bbb23. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ4J2400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2742fd3c7b220916bd4e6c28497cb3153f47ceb2e4a375026f392b386a784a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZH6S1900956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd24beaa07be813e9dc5de80a61a42fb8f287af879003fdbf4f68c5c518693bd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZH6S1900921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780f53d6f6fec01329a43aed5da1ff1965bd6f9d5da2ea140a88f87b11e4a4a6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPB602401241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f387b5179698ee3a5fe5bbbbb7a69a05fc2e63727d743cb933dd24ce442018d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZH6S1900936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7db37dfd15f15a708d3b6eaf8874fb4934fd3406d11e21966414e43d1bf1999. 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/QZH6S1900808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82aaa00422234e11208974970e4e396679890ffab4a360f38ad18c6be691f235. 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/QM7282476840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07a6bcdbf69340c34ccca3048f1bf570bfda5e61ffee2a22a75ed357f92f765. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZH6S1900796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb871f9dd81eaa1680fbaee3a95968664ed5fd9ab611bb4a68ab909afdfaa0cc6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZH6S1900662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7be6e8666b67443143ef12c19acbbe22da5c0c5d134a0bb914cd660ce28ee9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZH6S1900411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b00530a3edd43eecdff31695840a902bd5679323046efd066d3f0de35a1426. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZH6S1900635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230fb209d1d0e99bb238a70cad219d1f51d092121e3e544e1433ae27ced567b4. 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/QZH6S1900622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3125362974ba86bf552137216452943430fd038aca30b5867822606929012563. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZH6S1900809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55269da2f215f3ff1eba6caf2f975c0df9a82624ae0b4a297b9a5b7d7b94f9a. 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/QZH6S1900810.