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 0xa7a56bae34fe96600227dcf071ec45e948817fdd684846d40965e900718bb929. 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/79097441-44dd-454c-9389-1d9ede1c5313.json and https://artists.proofprofile.net/proofs/artist/79097441-44dd-454c-9389-1d9ede1c5313.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 0xc78e90ab491a10d8467c40bf135380d24905e94db5410071222e1174b6b52a65. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NOX8G2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec451faeb2d07515421222ff5a4c5923fb6a8a96242fea2e799867364614100. 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/NOX8G2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f4a2b076d8790f6162a16e10b3a45c9bf343bd881515b78b5070c3dbe190fc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:51:11Z), 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/QZHNA2392564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b16a428d45939cbf2f68e48b78b07d8d7c9a306da493d297b08d6e7422da342. 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/QZHNA2380646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8466116c0dd7f074f0c92e5b06f516d57f9987e22489d374334131399eb80c. 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/TCAHA2330172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5122bb4756e1c79e71fc9d51e2c4290ef9fa35ff643d08c884a843003d088a33. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAHA2330301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec486ffdc3e9f82658816b3a034fb36c0f4af91b212a4e003c7c109c7b7083ae. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAGE2247280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212ae9d114ce8b9258d082cefb8ccc0114eb99da0085f10ad59880be4a863826. 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/TCAGE2219024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deb3eebf4cd0f3bd65603ae620b87ea836ee3d0648c9059682a461a74c5f7f4. 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/TCAFO2130555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa0ca98cd9e8aa6bea8a5e28c822abc917cba4ae195014f9d65356d033a30ed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFD2084471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd20e806bcc9d864fb64a3b58581e5716bb441c72a95ad22d049eac994642bbd. 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/TCAFD2087356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb907d6b259aaf75f5b550677dc54603a53b257a04f2ed398b8ecffcd4ac6a872. 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/TCAEW2019935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75d8b7746307b512a1b8813a164cb48dd4da279001e24a7cc2d655605c0eab3. 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/TCAES2050202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b8d4c3bf7bb2fd448cef3cc64df10b6bb86786b14890f8fbc0e9a8102f0c99. 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/TCAER2098824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9103ae520889466a7c2781a51500ecf99e0b61dc942a00997785b65b8f32347f. 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/TCAEF1903576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd162568cbd7b17eb822cb2be7ba2ff7cb519dd30afaaed48b1e58dc7fc03bc83. 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/QZHNA2357590.