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 0xae7ff34c9661d5488cdc0dba38fffdb463504634c8cb1b4e0d868b7589ccf4e9. 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/c398416d-fc60-4869-8db1-d3cf8fb381eb.json and https://artists.proofprofile.net/proofs/artist/c398416d-fc60-4869-8db1-d3cf8fb381eb.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 0xdcf10087b01f987049c86594861236c9f1cedf46bc8cf6ecc05ae27f98f67c89. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZW9L2224746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c3f1dfbe954db705e40fa2c1c9aaccfe9b6ddc37d58ef5bbe2b549bbb25da9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9L2224751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d0b69fcb0d2b4555337fbcd5ff6fa8ad97689532e230416d89a452ee75c448. 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/QZW9L2224755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe3a0d04858e9b6a2a55858a19f9a204bec7efcb435d1838f8690299c0c48ce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9L2224758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f238103424b34bb2063f008364354990f661a0db10ee2eac15f814f5a95302. 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/QZW9L2224762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9686068e0bfed6427f5d46e5c5a5b830d22615d108c743012a84d4e4f3de0488. 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/QZW9L2224768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73c057071dcbbce3a021940fae44c54f4fe38d2970beca0b30eda1edf99f141. 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/US7VG1947648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65591c932e92dee7c4db974944ff8d5cf27449eb76b51f6e3a6999870339088. 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/QZK6N2266816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34440e408928cff739f4dd8e16c06521cd583eadaae6bf9373175ecd73afbb4d. 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/QZDA62507314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5682a0af454dda48b71100285e0d8d533d3c4e258cea080beb4882943ff67d6c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ72575079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80ee44ff0b17e7f1414b2b6afc6bd71a3b609e1414f9545066a301d071e9aad. 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/US7VG2513968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dd3f7f2623d0cd82a64355a35316e97e3c93499b1db1de04aab1398ff47a09. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFE2402268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1bfd11c582357385a4353bc9b895aeae7637dd05c7eb5a354badab3299e79b. 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/QZGLS2446714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abf60ae8b94c3d4b29aac7c4756267122c318e65f154effa8915c4ec9f15b22. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAHJ2305457.