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 0x8c0aa093c7ddaddf95f824cd2c770426646105271fe8166faa2c4ed7fa480c49. 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/c21564f3-bd76-42db-8510-c775e791c34f.json and https://artists.proofprofile.net/proofs/artist/c21564f3-bd76-42db-8510-c775e791c34f.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 0x795de5a556be47eec87fbece789032d16a89ee9d9c6f9d184c656e474b2c82af. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:35:55Z), 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/ZBMQV2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472277abe0a25beebbdc719d8e885166ce80845472322548538089a36679a33f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZBMQV2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa17fab061cf6d1e7cf62fe93a6fe3349dbe0a9639bb013d811123f69a98d733. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ZBMQV2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd7ce2f85ab4e7eb9a99c2fa577a01a0ccfe3c9aa0477d7480b105d0b6b65b1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZBMQV2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111f96ef44cd9514c8ce23bb5d15ff2690091cb9c42658670d67101bd30464be. 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/USA561049778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3db4c75db74ac222c36ef3f2a5456aa2643f24bd0e910fd4853f18155ce7791. 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/ZANVW2400053.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc98d2a2131e57d5b6e3c783d5a97403ed85924f2bbf4201d45d80fb79136f32. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZA1TK2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d77e015f33e06aa0743a486e634e195c3f5dd12a3f3b591bc3bd3d118571411. 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/ZA61A1302735.