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 0xa44638e57fc70388861a54cf244b891d10e767ace66d55ffca2889ed25bec949. 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/d41a8d0b-6cdb-48e6-a04c-a679155dfcf5.json and https://artists.proofprofile.net/proofs/artist/d41a8d0b-6cdb-48e6-a04c-a679155dfcf5.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 0x6194622108676158e0732f7c9966d16cc17a444ccf03e04448e26aa70a0ba9a1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMPKX1667706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bf5a5ee653f575bfd95d979c71db9f9f69c3d2f5c1eaf7a43283027676c381. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM4DW1660494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af1886275cb774dff2aa12ee172a40a48e2f49e5914724ddf5cb507dee12468. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM2PV1682159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b5299e941c88696840f3a1674eb0dc1b57a4e7223939133c3ed00b22d5162e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZ4JJ1762874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ddf5abaa018805f7fa1a848ff4ca04b657e4ccdcd9fad8c9141cf1f8bce235. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QM4DW1752906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f4127c2031a4b3f49268a2f544900eaae0a8786a2603bcc197e08fa47d7c1f. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QMPKX1760135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9368c920663c62b65eaf1c8529c48e54cd4312e3ffcf89812e5bedbb741cb159. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM24S1704146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2e0451b9f7f36e6cfcc2c1a06ce29788b1e85512ffa4ef845d98a506d85ad0. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:59:52Z), 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/QZAPG1740714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b125616f43747d5f6703913a4023a42444b469392d2ff5aa0ebe4482801c20. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:24:29Z), 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/QM4TX1871280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b04ed645b92914e276a0b330e5941ab37f0615ab92596a2b289ddbd1277db3. 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/QZFYW1909815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d494602d3b35a765e8915dd9d23be822727ac7aca11832e33d6d1022983f8b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN61905161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c303190e38fffa8f7c41bf475cb2d917655e80e108a0a6d95dcefc52caae0be. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNC1911080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8870d475a042cf93c1790e5119a37616762de1e3aff23dc3b032d0421b2a188. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN62142952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7f01465aba5b9b24817f2f3f799acdc281a29766805ae6e2760ff5244c2403. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T11:59:33Z), 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/QZNWS2165490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176ce01a1de17006313d20e8a991b194185d59929a830402f0fd81595f42622d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFH2476459.