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 0xacf4d0d5d6e2bdd7e893ec30c830cd34e98fdda9ff0208709d56079eff8ea9be. 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/73396d93-1caf-44da-9e9e-e448cfe1319a.json and https://artists.proofprofile.net/proofs/artist/73396d93-1caf-44da-9e9e-e448cfe1319a.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 0xb26dfb03d83d61bf5bcb04d3cbe126593e5055cccbbcbe0dca563998cc59140f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZFZ72339843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc200e02f8e078bf5dff9f42fd9049e4fffff6875dba633b54be45a3deafd517f. 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/QZFZ72339844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9342b84297c3706d58496c7a94208e2facb064ad45c6b125b32547350f37d0fe. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHN42362791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd5023327454a500eb99d7a5e60475c41bb43bd0bc43262ce14ae6d2394910e. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZHN42362792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c8f5904be2c0802fda4adba7ed0dcdc17b9d9c7dd8a17c79aa632884c3a6e0. 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/QZHN42362793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf230076a6ce87aa6a5b21c22e0e0d9e32a6fdb028cfddafed7794e956c91cb42. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN42362795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a51532e52c3c34a9616f2d6ab888ba3fbfd4014fecee37272dbc072649c6a45. 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/QZHN42362796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa658cf6654289a3a8aa44de7604c69c8ec5f5134306e9a3ae49a18a3ac0c3067. 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/QZHN42362798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedba8dee0428145145a4734faa2bc440499bc947d1f30d8a6fe6284cf600327. 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/QZHN42362799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a48d07dc3591c77fab099de42e06551a3b78247b3020bb9ec2ad022e033e037. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:03:02Z), 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/QZHN72325646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb8ce56c41dc0e37e32419d857038cfab63d67513aa04a1d7883618f1b200b6. 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/QZHN72325647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cc8e4fd05bc12f395fa747af3d02922d23997bce9b77f7897e31900a4e2a4d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:22:57Z), 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/QZHN72325649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9103a2bcf4daa668c7b7a86135a3d8a6889427cc57db0b1c2bcdd4d4d528fec3. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHN72325653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3486ee88c5663d8d1a19cbbeb1bde174007fa02bfe6c41c5ef4e4508ecbbb28. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:58:00Z), 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/QZK6F2352345.