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 0x9a141be66a650e7830ef66faa548b7ea3f6180c4accdf3c8de1c9e15a6c3262b. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d03e05c9-ae07-4828-a0f1-348763462c5f.json and https://artists.proofprofile.net/proofs/artist/d03e05c9-ae07-4828-a0f1-348763462c5f.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 0xc889f83de0ec8901747171e205b7ae41b06396937c79b77836baf555e91941d1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QT4K52533380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc22b96c60364a3d4c6ef5768241d2232185bd21bfebb35d86b4840a78a4900a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT4K52533381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf544143d7a6ca0e61778dba92896382dc2c9c458bd6ca72bb8876a3b6513d660. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT4K52533382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9bf974801ce90109789138ebbc80bcb7b74628a82839f1622cebd6a8d7a83d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:52:09Z), 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/QT4K52533383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4abee6365e107578fb133927ee34fab6fa8a63c0b0c6296a599194f1a2ae193. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT4K52533384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689c847ad358f45b7d7957a4a730d1c7a162ec1674ef565dae2547fd1b98cc25. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:38:02Z), 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/QT4K52533385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a9737cdd79acc97051db4ff146e51d46c6aeab1a2df260a9ab8e1c750103ce. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QT4K52533387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe650829b52d036c26c4845330c6e634fce029fef50a167266feea0b68d206f4b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT4K52533388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61019878c2fd1f6fb572bc43faf774396dd6e1f01d8dac57478cba322af2999a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:34Z), 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/QT4K52533389.