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 0xeceda2b17a4201d688d37afbe2f8010bf6948ef845d7d106d473f62c75a2c466. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca216b9e-e182-46a3-8060-7f22190539ac.json and https://artists.proofprofile.net/proofs/artist/ca216b9e-e182-46a3-8060-7f22190539ac.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 0xe59e4dbabc519d25c8ac2ee222cbad84834a3f61051bedc7cd705042bb0e7c57. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWX2518436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739c7e89438966d9fa8241d9834e5b9f3c47db13b8c7dc7e129ae87f845049df. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:49:08Z), 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/QZNWX2518437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c055d59f851720de2d702159e1e0e7f800095e92d39addc3e897f1105d6c565. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWX2518438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ebbbc0ffed1c3070aa22cadf96fe2b3234b2a83f0a9bf974f79491d5ff21bc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:58Z), 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/QZNWX2518439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782bbfa6fc7e5a72c4e50efb7d28926925dc50ff9b44d997e9b12a62831966b9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:28:38Z), 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/QZNWX2518440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d6071a2cc254d5a69c498bee9c7877439ecb802ddd162913f0344efbbc1e80. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:56:43Z), 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/QZNWX2518441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92f5dd58035400e2b5eaa6c5f130c47962373fa1198046380e302364d299020. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:18:40Z), 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/QZNWX2518442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b52114f89c7397e0e22f1c7d5b170f856a8dcbe5d54544d2e5f7defe6765d1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZNWX2518443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a87b2792daba8d2a2f297487b5d74dd8dc6d1e6e5c29aed7e650d8631924bf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:19Z), 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/QZNWX2518444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5521bb5108a6adaac4ee42a733573c8279c68cf68af08d3b37297d8900c634. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZNWX2518445.