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 0x30d8bb5d631a350bd2f1d5a65edeee28232f8d4e6035ac4d32cce2a29f39c487. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5a2c1b7-ada2-467a-843e-ea272fc175f8.json and https://artists.proofprofile.net/proofs/artist/b5a2c1b7-ada2-467a-843e-ea272fc175f8.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 0xbd5171c0f9b55ffd1916eed7b5a39a261045a59004a8a8c80a5c1dd153391c13. 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/DKADG2300568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c96fd6688641bb3ddca780e955daa9d9be5bb2c7085ed1699b0deecbebe0e7. 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/DKADG2300569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eb57e9ae1be6b646334e55f07ed1912b8ec08f4fa480d526df7c676996be4a. 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/DKADG2300570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21e72c3e3c749c27fbf6c67da350d5405087555ca1d938c6425f09702c2b4c5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKADG2300479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ab738b0756f9dde7211ea6e59f32e101a098144c8ab73613348cfce33a0c1c. 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/DKADG2300571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358dba3e71423330ce32acd002c9603754dfd08b3e3695c5106165fd550a5315. 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/DKADG2300548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5468156c53065e86dbe62cbd3dcc50b23af31123aa37be98e9884c7f43585a2. 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/DKADG2300572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe520083c4049c9685a158c8a0cba324942865758f2a00cb9e5f45ff70aa38709. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKADG2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358dba3e71423330ce32acd002c9603754dfd08b3e3695c5106165fd550a5315. 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/DKADG2300548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ca970675de996cdaf454e0047b4239b03f0eb49f7bbfb82b3e6696cd9fae89. 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/GBLPF6772912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21e72c3e3c749c27fbf6c67da350d5405087555ca1d938c6425f09702c2b4c5. 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/DKADG2300479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92d7139a749142d5b94647ce7ab390fb6dce3c3ba6d86832f6cb0980379cc97. 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/DKD9K2300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e14315718b5846ef479f3ca6a90d9b31a68ad99b98a013b9283ba61f37f1a6b. 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/DKADG2300381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925098d63d2035da4a4bf7091aad5dbf90a79e69df2830ac74a3dd7b084e2d5d. 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/DKADG2300333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61ef2ac76115c522cdcafd5bce68ce381ae3c1bcc8aa94dd5982abc8031b570. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKADG2300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b9cde2cb7582966f34ab34a77e27cc53d8c59da41e610962b9831b0bc58476. 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/DKADG2200377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7403cef579134861ab3622e9125960b0803ed9098dec8f1f7fe135a1f4ccf7. 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/DKUM72100660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0bae52d2f1700c7ef5079db09654e5ab41448df555b72fc8efe40816dfe9ed. 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/DKUM72100530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5e9fdfc4ace28142b86ab1a5634bc1df08a3fc1bdc91230b194b66bdb38456. 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/DKUM72100341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe8ecf779521ec02e80337eddc9ec44355a54d395d42c8094b063bc98ef9055. 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/DKUM72100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe010953a55d8ec71222ac465eac97f40f16801fbe701174b5c6b35be5d9fa646. 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/DKADG2000726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb829b92c642950d10404e22ba5abc62c4d4e3af7065ff30b2ce0bc997bc0653e. 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/DKUM72000424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8099308ef059698238fba410dfae561aaa1f88b07d5b5d45d2c1d034f57bec08. 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/DKUM72000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32db01cc9b88e1bd2e308c1db08815d6b708117202d2d3fdef959dbc693b10e1. 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/DKUM71900476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed82d66dbb3f5a04c395d20e70dbb4c3ccb6436f564b732f177b961c74098ea. 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/DKADG2400504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72587b8e8258623c770aef2af2f422ea8eacbea402bb85e48dbaf25027e7b83c. 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/DKUM72300296.