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 0x29236b15cd17d5a42b955050e65aae0120cd10627bb87978984763d36ecfdfae. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95d25712-69ce-459f-b7de-227863875f0e.json and https://artists.proofprofile.net/proofs/artist/95d25712-69ce-459f-b7de-227863875f0e.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 0xad248b340fd798fa00b2ee7fb9c937a6f5572597d565054bcc9bc9d93c4f78a4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEQN42200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0430c2985338a6cda07dd7054e52d209b485184dba2d9d536fd0a47e2c6546e4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:22Z), 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/DEQN42200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a965c6ddb862c54c17c01c059229cd50970781a828d8f3b930b97dafb7b1d0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEQN42200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1ee6cd6d5e6573cdebe67191f1440c23d9c1058c645b0f96a3cc44f7d4e382. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEQN42200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25576aaac6cd57650e2b8b566005ade75a60e5fa7fef215bdccc8b95e28e8970. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:26:10Z), 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/DEQN42200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bcc42dd33da7ed03120f3148098a59e7e1ac5de6e82739397b8608661f84df. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEQN42500146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160ee6d6d030d59a0ec0b89e022427a69d8cb8a519350d7e53a2976267f75dcb. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:33Z), 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/DEQN42500149.