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 0x1a06d72d2c3e27aa98729433a7302192daec06e6b47d5ed4067cbe7078e7b029. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9885ab15-6dfe-4a1f-9019-c2d864d2d846.json and https://artists.proofprofile.net/proofs/artist/9885ab15-6dfe-4a1f-9019-c2d864d2d846.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 0x6c623da0e15f009b9e37a8b2f18ff9c560ef65c4c6dd9f7ae93a385f51ec8f15. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM42K2084381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31338e32aea56be4980b90a3103a48e32d4934721a9f61e624e62aae8e1d9608. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM42K2069296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40be3de54244f8f9d1e5982706a4d280bda3fd5c02494a0b0279b22965f5fdfe. 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/QZK6N1945914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68e80d142e39570eda4ea0d2d266144f08bd09a5f56e977a4ddc0e5444b6e63. 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/QM42K2083850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5330d64d41f3364afda1b8bb57a3034cde9f0e2ae02d9803d764800f7390af84. 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/QZ5FN1963246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31bfdf55b6f01e6686a1d307cf48eac587ee546bfb58b576b67c3887cbedce6. 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/QZAY42001221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e24acd7bb00a81946b605f01ca6137ccbea71b898c5b51b6d166af1fe8e2c3d. 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/QZFZ32076419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b621c34a0b596b9102ef8f6bb726937c7b330cae40fcb99a7340cc1fd6db3c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ32076420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340bc447bd9cd7d0b1c84070ab7a257ada99c91af88e14e7ae52b590b2a35697. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFZ32076421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6590305584bc6b34c768f012e5dcd21a0e14965bf2d0945e895eb3104c4021dd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:37:12Z), 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/QZFZ32076422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf5457113476cf7a60d7afb14be67c976ae23be84bbe2b90189a66bc9c0b8bf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFZ32076423.