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 0xe670f1950f3a6ccf23c15df5db02a3889f40d46159eca095c107b4d68e7398e7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c0ab900-0726-4ec8-a9be-6b009857fc9b.json and https://artists.proofprofile.net/proofs/artist/6c0ab900-0726-4ec8-a9be-6b009857fc9b.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 0x0dc4bf9203dd7f97db10a1f45ac106d784fa8e9959a83ca512b5d6478bc9e154. 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/SE6HN2084169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d087f0698209b9e37af8de86f2f1519728fc03fd70b5f09984441e9dce9ced. 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/QMDA62238570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7859248cac964e1d4239dc93f35fda7ee5145b27d208615d51d4bd2e5b6743c0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA62238592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ce5f5144f068d910b497a09439a9adbdcf23cad87e5e65e63b7e800be17747. 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/QMDA62238640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa17d69713ee9098d0f9384d6c44ee758a499430684a3b2e0507b28ec4bb08d. 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/QMDA62238656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ec5aca02a9307cc83803586ba1aa386f4d133239f2d53263bef5e9b41daf8a. 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/QMDA62238654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6cae9d14a0039cdfdb4497b5029d9095afe6998dbc34e436479c8e79b29f1c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA62238661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721109bf9fe72f156ddff5153f9fe99407543a0bb280f9523ac9eb98aaa6c31b. 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/SE6QE2010339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc4bf9203dd7f97db10a1f45ac106d784fa8e9959a83ca512b5d6478bc9e154. 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/SE6HN2084169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57f02b35f5615165280721fcd2b36de03851a427d9d5ebf0978cc84f28fcfc7. 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/QM6MZ2210937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea1f6043afb9b41bc03d2eb41201fc460e6994dddc337ac6f49a49c405c23b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEUM72000661.