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 0xe5bdcbe071a5e05f93583f33ca266346bba812d3402228479ba3f5270581fcba. 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/76b20eb8-738d-44a8-a9b3-056ad0dc5c28.json and https://artists.proofprofile.net/proofs/artist/76b20eb8-738d-44a8-a9b3-056ad0dc5c28.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 0x2fff819a3270187d3ca05e6ce7be4ce003bf3fad2803b82eaacd3058bfd76ca3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM9A92013466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912e4924ef1e4075d7435aee956cd494ffd8904e017267eb551036fef52408ab. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM9A92013467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd477c1af65fd7439b1e13eb3a7a91bd34771fb34f218cf31809c8143112881f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QM9A92013469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b82fc27e0b6135945a5ee2b3213d7be30e0d91d46c3e07d8b70b3a61f91ddd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM9A92013471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292eae1f214a4113811e75c7e340ecd09905d71fcb6cda9381320da5c506aa1c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM9A92013472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d937bcdbef04c4615c950aa103581e9a25a28e2444cd829e355899f2323ddb. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QM9A92013473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4666b8d08befe57c2dfd90151ac99c7877e7c25acef01c45b13591081f4318f0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM9A92013474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe21ced3d954d197985a10c28ff409ca01fd8c2245ccceeab032986a09ce86a7. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZFZ32452327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1b455aac412ca0aa7993554b81f741fed81de577e35568d48b46691dc68be7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB22310018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1b455aac412ca0aa7993554b81f741fed81de577e35568d48b46691dc68be7. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZTB22310018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe21ced3d954d197985a10c28ff409ca01fd8c2245ccceeab032986a09ce86a7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ32452327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c09c0c059d8bfbc13ed7de5cb23abd34fa487c62563025df3b19f7fba8bb34. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEQ2203525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81010d2ac5c60850a04c921c903384c3af491b7e2e934a031df88f3ad753148d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTBE2399173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dae1311f2a1774aea56af2cb2421af5993af1f93504af51be6da364fc197ec. 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/QZWH32400527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59d12ec8f3ff65f35deee7520e0efc5e9053b08dfc81d2d48b98d32aa54b15c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWH32400792.