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 0xc5d953f66120bb8caa6510d5d60cbeea8776b7219fc68e5cfa9c9492197e5775. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4bdf2632-c251-47f1-b065-464698d4cbc8.json and https://artists.proofprofile.net/proofs/artist/4bdf2632-c251-47f1-b065-464698d4cbc8.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 0x32192604c2fa18a93af59f527ccae9471b49be21c48980d6490629f217aa0245. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/ARRRB1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc307bf0cb926049c3edf53e2ecbde98db78dc925e3a5639092c64a53ba7a1b6f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARRRB1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe65b130bce303b80580b95d04dde901867c0adadcc88190fddc9efe7c2e979. 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/ARRRB1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a180d65aa63eb49a39c63892501aa1913686a6374d1574a4d3208a25dd2143. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ARRRB1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e5c11d222fb0bc8e316f029b362a9527eba346e0d3981493f7fa76a971ed5. 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/USL4Q1954185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69290c937809aa9d1d5d03b43f60d8efc65ab996d66c3d20792db022d0dc3263. 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/USCGJ2028631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69290c937809aa9d1d5d03b43f60d8efc65ab996d66c3d20792db022d0dc3263. 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/USCGJ2028631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62a2a7819cf52d603a8234ecac002d893bd9c85b533ec145fda5c6b8b49dcf1. 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/QM3DF2161297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fa01e48618c507a7297c38da1bb78416be63cb2a0b314ff41fddb1247975e4. 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/QM3DF2161285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf360b0f8cd1865c3a80130fcf74dd978f0b280ac84d4836faec3ad28916401ff. 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/QM3DF2161286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf096ebfe81fc409f1baf652289d6d1ece007a7e74685211e5b205a5ee2133858. 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/USCGH2142238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d26f5d482803bda2bd81e449cc96ca59bd4a717ecce8d2c77aea4ce11dd63c4. 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/QM3DF2161288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69290c937809aa9d1d5d03b43f60d8efc65ab996d66c3d20792db022d0dc3263. 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/USCGJ2028631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3342b319eeda18312310a3160c385fd8773c51719860ff887a5c50f4bc2435f7. 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/QM3DF2161290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cd44f9bc3445e6da70b16cb69a85e1fa4452dc903d2ce6e512e10be28659ba. 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/QM3DF2161292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591aae368ed3cbb76505f6d7d9e5f494fc99741d24741d8351ac6d5ac3d4cb27. 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/QM3DF2161293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e5c11d222fb0bc8e316f029b362a9527eba346e0d3981493f7fa76a971ed5. 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/USL4Q1954185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91e1c7c0578f68dcaffaaaa360f718ac7eef0e539fa249b425248e712e6595e. 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/QM3DF2161295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd297e2bcce3412dc15c34952b9d887c2cc1f87af011f7be0084c445ebc0674ee. 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/QM3DF2161296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62a2a7819cf52d603a8234ecac002d893bd9c85b533ec145fda5c6b8b49dcf1. 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/QM3DF2161297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a8502c88b5d23e85bc4ff9de44fdf3aaf9ac40a28923b17609c380d497eae2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AROFB1700049.