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 0x59cc6a343119e27a9216cac9572924dee10b998922d5997fdb18a63c72357579. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/159e8227-743a-4517-9fef-64101e4a9f83.json and https://artists.proofprofile.net/proofs/artist/159e8227-743a-4517-9fef-64101e4a9f83.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 0xad8d2e0a0e253b3f0f7e76c2a49406d37e1370f6daa77507266961268d2bd8de. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES62232547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe682a53a5591c48fc7b550a3f209c4e74fbbd87d5d77cb431eb7ca71d4b9cc11. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/KRA532400657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0d64bfeacec3eb817ade17a3c9b1dd5e3d19c4df5e1c6a536153c1a60ef8ad. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:33:55Z), 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/KRA532401308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd211eb0e0237c75c0468953f252fd3068efbb7f6ec46d1837a432a44387a9c20. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZZA0P2405508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c048f3cdd6e265ecbdb43af94815762a4e733a0901f161ec93aa45ae3fefe9. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:04Z), 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/ZZA0P2406721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c9db8087df2bb92a5e0808a04d6b3a6ccf01920231b1626ccd3a8229af756d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ZZA0P2408873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4676d36de9ca6154b082b3602457f16080b1766939d7d751517122051f453d30. 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/ZZA0P2408933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0219323d5a96db56163abe4cf5c372e02a32dcd159f479b59ca97664a795f787. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ZZA0P2409483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1748e7108631ea3edc8ccd713a4deb004b5557f2f85752e5d322a871a418d90. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ZZA0P2410396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9982d4872c7151c392a1bfc136370df6da36f3f014ff0aba765647670c712252. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZZA0P2502411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d86995526b2b7b23bc0d81f0ac209b67bb853794966dd70c5efb28ff88e102. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZZA0P2515432.