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 0x09d445e75bd77d5f4c8235c123d94793110a0a745d424a96bf694c6c98683c56. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30e6166f-a7a0-494f-a60d-87373384e4fd.json and https://artists.proofprofile.net/proofs/artist/30e6166f-a7a0-494f-a60d-87373384e4fd.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 0xa71e37f35a4f1879c22bbfedcd813f431de642e47e7341e6c4865cbaaf78fc8e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZEC2308103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a27923c1c5d7d2e22de0f29b6d905f6d1fddd163d160a8598c10978ea5909d7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US38Y2418595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a5c37957f02be628ce57beff5fab0465cb1259bb9f1fce23abd2a1276d1cdd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTV32366717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769e1547a255edac9b7b3f1c041e4936bd346b03894f6eabd38aeeb62a48a144. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2374064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59da5c73464323fbf80287981d093d68bbaaad5fc926f036e41d54da58ea3d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM22319181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050869c1f1f78152730287788cb8cd9f4e2901d9efbfa81efd0c15b55bd941d4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5052300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e44d70aa4b8a1f71eb78fec984dde1550c8193fc9d7f6f23085b95bad5d277d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GX8LD2208280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7580bf9d8970247936a76ce97787c73f7e6ad426c026d0eb8930dbccb4a245c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRR642201400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10182909011b7a2d5d8eb112b8da68931c65d5e119884a361a6a6481f9f21cb5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRR642201401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fa0cdf7f8524c5bc6ea209a71b16b8db67eee83cf7ee7100f5f9b53bb45c16. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRR642201402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ba68dbf2bb029d67dfc79ae3d7bdc2ea6f1472840ae55cf27c3c1757dbbee7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRR642201403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd69868a454d9c88eaa38d7dcd4c75c672b577fa223f4c7df96618de11c7fdd7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRR642201020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda54dc0edc88182e94ebd80a4d2c346f0260e012279ff799924587d7133e0e0c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GX4R52183170.