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 0xff7bcdeecd9c0b1c52123190d349d85d40f8a9bb5fcdfecc155c8e7784fbfc98. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f92de8a6-cae2-4507-81a7-4ff3f1f6c996.json and https://artists.proofprofile.net/proofs/artist/f92de8a6-cae2-4507-81a7-4ff3f1f6c996.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 0xca5ec2e15617e5fb1c812e171dbeac9d8e6ac75ed1dc952cb67774f68be4440b. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ES5022102029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9817dba50d97687cbd9644d0851f8f4ddb42c3dac802ddc01d76b8c4de9d1669. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:05:06Z), 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/ES5022102743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded7891f62e6bf5819711c448736e347d1159e10cefab4b36722ba0ae4879550. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:56:28Z), 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/ES5022200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc07e2d3bd55573dd2278f95a2d10420488c9aa3d843094156d2cdfeec0a1cad. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:25Z), 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/ES5022201151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38298c222195203b3ab8867d2d2c2d0aa66cb8ed170cf99ebebaae1b684d9fb5. 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/ES5022200986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98442b9ef7048ff3f71f0d58699b861b84fbc3b13f13962c77f0868a8a872382. 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/ES5022102449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a03b0418af7bde358d841f71be151562096e1bc59ea7aa848074cfb12fbd8ff. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/ES5022201152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0a130c3cf03c7518e519623b4e9739b4d4008fd929c185f162d386ef48167d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:36Z), 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/ES5022201153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de4b5ca8c7260c63bc54dc939a4ea6036593494503f34969e6717c7929e55ba. 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/ES71G2405513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53146896c368c3f5c42e98b26418f31a624f2e0011210c7d4169471523720c9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES71G2410948.
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