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 0xad7464a76131b78a28f163ccdf4d29ed10b72ef940fe3b37582534d0ea5be34e. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38d4b146-f34e-407f-99c6-394d73e05240.json and https://artists.proofprofile.net/proofs/artist/38d4b146-f34e-407f-99c6-394d73e05240.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 0x6ad8c56db7c6fe177722e225a6944fbed996ea9511aabcc6a83ed44c474ac98f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:06:11Z), 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/QZMZ92406684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf74b94e222bdce35a129583f55316385318b897717adef600293b3dfe7f82f5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMZ92407894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5d8772147a452fa588156adaa4b8686b5bfbb965cb387a137d0990906c149d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:35:59Z), 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/QZMZ92407897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f3033bf62431b06821cc1fd57f36bccb88688ad6d916c7845320a1f3752505. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:13Z), 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/QZMZ92474229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cc1426eb970ee3917564063da4e16e1c9a33cf3cab1b166895f931554790f1. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZMZ92474231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2368793630a6ea1f4bdb8a89b40750a1593d0790b3970f29fb03913cbb85de26. 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/QZMZ92474232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba46d05d868272eb19e7d9cc61af9fe36559959b2a9cb4daa310a69463f1787. 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/QZMZ92474233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e6d2d2dd292975b928c542b2888aec9b754925125a0acb7111a3ed8d8be118. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMZ92474235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba72542e52a23c207e88fc681b9f700aee5a63705c6077bf8ad9dbc4b6a11130. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:22:36Z), 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/QZMZ92474236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ab1af771d437211806f86e61f9aae8dc8f852f242af5622890776e7989f200. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:38:10Z), 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/QZMZ92474238.