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 0xe8882c29f33159cdd8171a87c095380d0d27ad60ffc02811db577824b153b1e6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcb0afb2-f1d7-4099-9aae-aba8baa87023.json and https://artists.proofprofile.net/proofs/artist/dcb0afb2-f1d7-4099-9aae-aba8baa87023.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 0x9a7c681f4d7feea3b63f8c87da06894387803732e932db98a03889f70134242d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:36:27Z), 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/DELJ82089963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6601122937cbacdd5b6ad7ac3954811694e559380c5693436ece2581149b842f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEZC62035646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa101318cc0e3957f70dd90d1c6f61a097cbba78d23fa27b18fb187ac749bfd. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/DEZC62169078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebc31dc95e97cda34b093a445903b87be83ebae09c5eb58a7d93de94cc39692. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZC62111913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1470843a9db60904b94defdadc82989e8a59739a2a77cbb5eab9b19cd88ef19b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZC62118766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ca7e0680d6c3fdaca92a2c36b31320b5975e1a2349808e38c4da148568d420. 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/DEZC62126867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bab989b52c1b7a95cbea6131458468acdbfec11949c6547f62640bf99aec4ae. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEZC62134696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275e86c6c185ca5c3ef12359600259ea5e57548b9fa4051d1ffe3e0ff1dec18f. 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/DEZC62254511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ffa6f6a75602222003c840f014405ede0ef134d1981e3159c387db1dee57e4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CH7812359008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fc076337bd5df7cc941038d5d2db1c04a784c656376fa70f9d15c8baeadbe0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH7812364606.