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 0xae6785403f292bb556e4b00d77188c8c9b897262e51979e6c815ebbcd3106d3a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8237ef10-a0ae-4b85-9fbd-4e08f166f0dc.json and https://artists.proofprofile.net/proofs/artist/8237ef10-a0ae-4b85-9fbd-4e08f166f0dc.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 0xdf8b67566a4d4d4c7bae911d989742717bdd22823c8fa4df2347d7ec564a59e3. 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/FRG140302770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaa6ad4b9126e1f211918e373ef824c4d7a9dc08b53d64443b612537c996618. 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/FRG140302790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5c40319109426f57a2e2aae2897a95450b588a1e14c1d6c7f20b339d606ff0. 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/FRG140303080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2702dd717e3b7be876e5d0ab6121c8153770d2fee586770d337a3e19898ad28. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FRG140302870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828015b4c70fc1e4446214e362ebca35b28c0176b715801e3fd58db18b1fc699. 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/FRG140302980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7093ccda9c54c13a9c5b3591af41ca796287cda51865e887d940f009adc8e293. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRG140808670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e8a0330888af7f9c7297480877fda549f2c884e16ad6e217cb523b6962414a. 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/FRG140808750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485c3eae95e3b2f4b6419cba71ebbd4d6a0117d85bd311cbfa510cb0ce23c03b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:37:04Z), 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/FR8E41000432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee58d1c76798afb3c520984ef085bebe807e5a2ac64d401e49273aed8a6f5d3e. 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/FR8E41103753.