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 0xcf18e8efadcb70e042880fc0b30efc1c587ba5286113882a7b42a788e69fc9c5. 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/352646db-0b39-4ef4-9db5-358e2cfbb7ec.json and https://artists.proofprofile.net/proofs/artist/352646db-0b39-4ef4-9db5-358e2cfbb7ec.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 0x01d37d252650233a2e6e12a00abe22bed817d56afa49bb942ac06f29a5875128. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEY472083471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8291465a0a42d2c193496575d90f46b807ceb478c6557861fd20b11587a362. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEY472173169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44caf3472f6734e716a81b255a94d521cb8f3714f9dba17382f88040f8d1230d. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/UKFHN2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84d552c0aba4a0080ce57af95ef4d763fcb82f66899acdf96ba03ab9fc1ff1f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEY472270011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc493cdbcaf855ae3f8b725ebb98dc31806a98a3701894274d3ff14e8fd5ecbed. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEG932200856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08421e58077eebef33a659ed1f8554b6d1fbdff3e70644e8cb42a331281d5d9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:10:09Z), 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/DEY472380076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b90fe7783711b3bddec64a849a93fe002423f8c5613c4737967ae4e1d7922e. 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/US83Z2491481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fb893071623c46b91c4a43a496cf01a47ce5e3294cef89ebeeec7ea43ef5a6. 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/DEY472482768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d604865c01b0ef79529d37a2603911d8e6757f8deb147bba1e17e82a683d54c. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:55:14Z), 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/DEY472482724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033323cd5aedbb4060dfcd95c446773c04b03a63e261e92d0fb7c22d0e83d272. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEY472575879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175f2c3b12be56bf3eccf2ba5bc964e65656574d6183334a41f98be1b7613382. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ESA011991874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee46b4e4ef311eae92422600cebfca32352eaf2c358c09e379636eb8d31daff. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEG932200857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbf92565dec72290b5fa8d997bfbac3a5116da940f3cdf2dd0c916d3f6c68f6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEY472084836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791e8fdc5696295b95f11f1d5d6aad6eee3af498ad2e4fbab534c5475f5630c3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US83Z2009941.