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 0x7c9d451e221beefceb057f56def35b829ccbb83c680b06af277d91c59df7c641. 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/dc0eb6f0-850c-4c0b-abca-e0514d941666.json and https://artists.proofprofile.net/proofs/artist/dc0eb6f0-850c-4c0b-abca-e0514d941666.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 0x5b9a938ffdcfe03412b11e41b89efd57de062a9327c478c8771da433f07f8941. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/GX38U2275778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dfe1a5e471af11d353bf950341b1bcfde7d76dcfccb7ac86c60b951f9dac31. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GX38U2275779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2c60de9d3d650930365480de0f12d0cb9c3acc1ac7c70ffd7ec4afa9416a13. 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/GX38U2275780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c56a57b59f8fde3142a2b97923a2ebbe249e6ae1a5c4ec1491a7159fae7340. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX89G2270648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e58d1e189630b1545847912897b9ce3cab1546f2e079a4923444d5c6b0cbca. 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/GX89G2270651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec401d6d1f0391fe7bec1859ea94251233a7ae2cfffb4c422656a696de5d374d. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6K2416719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d8acca98e2f9487b346d854e7a7dd39f2fcefee6ad0537b4a620c882a5c5d9. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZHN62476397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05070ef24d77d46a0b38bb7e2c11bf7c1ce79e1e07518f3328d0a76c1336c75. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6M2468666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76c3e97573192fc574a372381b8b3ca85b17acf3a1d90ffdedca3dcd9bafe60. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN72412224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c3c74385bfcd3eba4c558d05c591bfa1192b2414353677e89bbed1fda7c905. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES62573157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0df7d5d48064c79e2e3f0f69a2067a57ef9a0e5d920b6fbbecb7594b5ae5e7. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZHN62513687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcee0e9c667bd8bbea0daccfe30aee8abf838b84dd5e1d0eb94ba9e537db3f25. 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/QZTBA2510809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1d2b37201b2ab2dabb27f11956b1b94a527aa8dea9be94c95b2e1e675a1ecb. 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/QZTBA2510811.