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 0x24303b83c1a12127b542d5d76acfa3c702e1b5fe5f7956861a377587fe60b90b. 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/b9bfad8e-ee3b-4182-b67c-4c44f16759a9.json and https://artists.proofprofile.net/proofs/artist/b9bfad8e-ee3b-4182-b67c-4c44f16759a9.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 0x14d79e54227d47865e0b2c9bde14a1668b7354f04ccc3fdbdf04a7d6b9bf56f7. 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/QMFME2055080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a821087836d0c17a391575cdd91fa8670f2c798885b4a62b1c13bc6387f00e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92015711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b52417ed7c985835936c201094536e0e6a16b465b20c1e12e8c594e82c006a0. 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/QMBZ92015708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8638ba60a9df2770069f581f7747b8f8be581abedba9240b78a277ec96dd75a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92015706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d79e54227d47865e0b2c9bde14a1668b7354f04ccc3fdbdf04a7d6b9bf56f7. 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/QMFME2055080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b96c5a630988f2d6fa3edadba9192524fcdc968a81445671808a8663aceff05. 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/QMDA62151046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9476a529eac8ff326cca4b5881b469b009b8995f8959ca3daf150ac05279f30b. 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/QMDA62151045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93f3a876b7c0d88f99c121b7cf01d7d384ee8f4623cfcc02634b0fe5d0bcb3d. 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/QMDA62151044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17cd534f65a9b91bd3c0a4095a54a496a34db50c30d09ce3468a7fb2fe484d0. 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/QMDA62151047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db08266f34a9ef336bd4a6cafab0d0d9b361c60225e026507ed95d3e87b67e9. 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/QMDA62151064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eeebc72f4b9dd28ef6dad8f2969813ef3fae080e6cd42ee0b7157c74d1d4c1. 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/QM4TW2141855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9853c3f5a357da3bf858e17488df58f89143549569bb550725c1b7d4bdcf2776. 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/USANG2126753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042543ddd520ef07884c8dc300182e53d6c45185ed56d6226976b7d433fdfcf3. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USANG2126759.