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 0xeadf1bd6ff0be4f08a5b427ebc4b101ab8f20462464207eb05df21e8b4325e31. 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/5923d291-1737-4ee3-9d9d-61eb104d6847.json and https://artists.proofprofile.net/proofs/artist/5923d291-1737-4ee3-9d9d-61eb104d6847.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 0x4e837132191e66c029b4d366ee0d4f905080cf9411efdc041da9bed43f80c607. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:57Z), 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/NLRD52268587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a7df28ab7a6f12b61d7fe6aa9f229b2a590242d9bd6a7c032b789cee914eb4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:14Z), 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/NLRD52308216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2858aed27ffef19fc8aaa08d6744a542ff4bb02fc2250fb9d761d8a77a50aa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:54:51Z), 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/NLRD52308218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11794564f951d9eb23f45e763952fac2f586b83efd3bd16935e67b3f436a511e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLRD52308219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f554a2fdda16a9b402dbcd8b99a1f6d5cb5558bc6b8e96876544b5c6c98e4ee. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/NLRD52308225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a00421f8467842e00a2c6ba507b07e4b2367f3127132d249095d4c203b0a03. 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/GX3HH2367433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219c9cddf1627b98cbbd7f25de49ebe109d1846885ca9c6323f24997506a304c. 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/NLRD52418968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495135c7b597a3ab87086c3cc6c8c3199235b9309dc20d7915be06ef9488d5d5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLRD52423752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cdc600e74c11e1d83b1b931018dd7e2af6158cf941f8eb70e0f3b58356410d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NL3M12501129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a819f89e61fc362970b8ecd04ec03592671502885b0ede5964162b0c318f4ef. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NL3M12520589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef53fed6ae1d457c7b565a144e3609b01d6f7b6b4d6c5623bf0e45cc6a9d34a0. 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/GBWUL1934585.