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 0x9d1b22b8ce26120be3bd671bc0a6d45c22800104ce9810f8bf604e5936e6dfac. 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/ff20c166-f1a9-404c-b6cd-8e0a8e0fa9cd.json and https://artists.proofprofile.net/proofs/artist/ff20c166-f1a9-404c-b6cd-8e0a8e0fa9cd.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 0x41c04ff8c4a18e4e227f61562d41d6d4f708482f0a6f76b804a8898f55b22acc. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/DELJ81803832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb095f2af3a58332766263a167b90aa12336ed7d3e41e04c3f7c3b1fb847672. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DELJ81813091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28371473d971bb539c123f6b813d5c81053611a221ddfe6edc8c1a79769dbfa. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/DELJ81825087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbe76146515e8be14ed7ec1564e48486f68087dbb22a945f625cb87d2e8c6fc. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR10S1997995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff524fad95b04df5214465f0a865d634b31c3ffac8a65b4df4f4c328d6c40f4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR59R1931536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471b2ebf385f3469ce1414891bdf6ff8c116fa76af1f031fef195595643c20e1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DELJ82028567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8a8922e045414af710603e6cf9c029ef9ff301baa2c5309f199a0cd3c78acc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:58:28Z), 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/DELJ82036872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83220a9bfdd2074487fa1b3cc8e6e47c2a7f61e7da4a661403c081d91f2e10da. 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/DEZC62330632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7572ffbea4c29d4732c4ca6aaaced222c647ca803adc1a9f1e47fd4d5803a2f4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:08Z), 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/DEZC62369944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f8af98ca8aa8a709d203ef37b3a68b7880965342de3210c03ffd407fbd79d7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEZC62412995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dc5f37d9104b39c8c79dcb8d1a0dd8adb60225bfe87e93c5a65aeadb544c3d. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/DEZC62447481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecbf6a926db71c581c20699476c9ac52386bc5fed4092e00eda35d937485f3c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/SE5BU2515248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9694ea0c27b9945d77bceaa2eae1e1f60fe87b07cb8d0ea706990cf2572509fb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/SE6XY2509408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8446ce8376b68458b4a6b9c818a55be6bec0fa9a169cf7fab7745c7d8acb7647. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:02:00Z), 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/SE6XY2509410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7814dbe199c933cddd5803c13906cd13828bfda4c4130c274498bb74d90b4b3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6XY2509411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3becd9d3a81137b9e65d010acbcc91d9557445dddcbd2e9d70259cf7eca6a713. 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/DECE72107900.