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 0xe369699a15f5a04d6c931ad7eff895d11d55dfa4a33be7c420b37f2d4bf487fe. 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/3692e6f3-0082-419c-8602-d37262148c12.json and https://artists.proofprofile.net/proofs/artist/3692e6f3-0082-419c-8602-d37262148c12.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 0x3075735638541a3208ebe8f77179b7457fa4b4a229f078cd96c61d1fcb58094d. 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/GRE011200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45afcd93b77cd062e53e14f69229c2f0bf25b5a52d2ab689b70aac1c6b85d494. 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/GRE011100419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd642afbd7d1ebfa9593a27fb46a276ffa4724090216a5a61eafa1fff81b2efc6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:03:54Z), 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/GRE011200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38fdc529da59e0fffa7cbfc2379a6f1f57ab8408108b04848e9fd09736f4ad7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GRUM71402232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe043d1b1805df60e92202359e3ffdbde98c3ea301343c6ad11cd477adfdb0197. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GRUM71300953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760eb8b2f1c23eac7d30931f867d10c8eea11592fee7b64ffdca9f8b9d1fc355. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GRUM71600832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875dd80ce2ceeba2377f2b78860f24205c0e359fc3bcdc04fa969f06f4bd8e2d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:34:13Z), 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/GRUM71600835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689469c7d872cfdb2f35f3e83815a6f9da411ceb06f3390fb200394ff68d3fa3. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:04:59Z), 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/GRUM71600836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40345be21908cde447067b0a8b48c36b1e04883290084cf557d342043accfb37. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/GRUM71600838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22b91d6c0a1ba57dec1c451ea81c627ddeb7bd265a765fcccb279f100d83120. 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/GRUM71701357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93eee535d6a1721f1c2734c0b741b4236b350d076ed6c5daac8a480ce1bcd66d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:33:48Z), 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/GRUM71800834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78f4e42654f68b0f9c273e5f18bb51927c5895bb24eee13fe50961db3d20357. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:28:36Z), 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/GRUM71601206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be38fa52ee32efefad92f8cd4c9f4bce6f3e6af3019499b684c69ced7d34435. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GRUM72002660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0867115f7c6d009b32ac6ae08267a220af2d3631c18f58bace07dbadcb7a7e40. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/GRUM72200561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6afccfb4d7a056e674ebd11d978c8feeaa1aacb66aaf1b60432ab669b270b4. 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/GRUM72300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29106fe30ecd7437032c889b6314719046b77cf52448948f3d0114ffef696ab. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GRUM72300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209864bf4e13e040e4ba67feb37fc04582ca4165585c5f6fc6b7a5753102b355. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/GRHV12400431.