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 0x7417fb0f4ca56426f5ac5bfae8efbc0e606f000428bcbc0eb1920cc8949df695. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58dd5a5a-8b6d-4017-8ddd-4977d9f5f5d9.json and https://artists.proofprofile.net/proofs/artist/58dd5a5a-8b6d-4017-8ddd-4977d9f5f5d9.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 0xb01305a86a3edf672534d509c6c463918896e81e32106b4c72b0e32f148230d7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXD7G2548888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9de7a28d2506d9a1aa608b3a1b1781053448a20c754e51a040c7b7e4d43aec. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GXD7G2594512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e889a2cf5abcc5c4e3e08860a084b4c8d1d305f96ca7152296c73e50a439eb4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GXD7G2566790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c1c2f8efbbc00d5349cff83c504e338bd60d89aa7112f1a1c1aeae91a2d1d9. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/GXD7G2531089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa978a8b72796ff4a4bea5ecdd5a5a87dbfdd0e27ac343b1f52944c982400f10f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GXD7G2513713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e880298c522c1195f0b5bc8766ef7b38d277f14b43a469c0740c1ab996fdd87. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GXD7G2597045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bd073ff2f761ca7e73783e8e24c84429ddeeee1e5bb5b09a57674fa1adb80b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GXD7G2541085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f135fd7c2dc7b567aa13a64be2e20c315b015d3c36f16b719aa677f405e7d1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GXD7G2531254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26beb2435d253946557c7e65a72e1a43c6d8e70269d384eaf1edf7b12d9759dd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GXD7G2545277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e6ea491afa84dc846f58b1714ed67b59e69f5a56fb25877050673c7152c19f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXD7G2534272.