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 0x28ddf8f60cca9f3c17121f208d6a87f64c12ebffefa95f2856daa1b7471c8b7c. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4ea7210-4292-4f1e-bf00-e352e6720495.json and https://artists.proofprofile.net/proofs/artist/f4ea7210-4292-4f1e-bf00-e352e6720495.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 0x1e02f8a7bf35f460e0c45b5b1e36070a923e2fb1bfbf083fffe22d72fd0fd3ee. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNA2057693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459ddc1a1d76f0f6e0895a669c7a2c98df2fa3950edac75d46c4fe7bc54dd022. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNA2057694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd65c83e44d2871c68b37b67e8e4f95675a2349eabeb31db5652abd2b5be4fd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHNA2057695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13161d33d7a047a607629973bb1182ae2d2e007144b0e95e37bcb63edce423db. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHNA2057696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e12e28aba305493237f5be6f32535f54bfff3c6696df6bcf24e6f85d6c7a561. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZHNA2057697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd091730f127f0ed8d769dbbd3be1ba225200de088d71d3ec72b2c174ccad8815. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHNA2057698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc743b6438ac1a6171205291d880f81ea58d60ecc3a53850e87f4a64c562649a6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:55Z), 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/QZHNA2057699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5288cae073df3d9ab41e5ccf8f7720bfdefce1c2a0085a43934846c06d444fb4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNA2057700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7a6aa95b808122d598a806e665526ef40bfe43b53b2772aa5caf86b2a43c87. 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/QZHN32205241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cda4d6c89dc47e0e2f60f675a6a8fa541e6abd5782e300a55f1d79fc532fac. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHN32205242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095b51b93d0d66cc7b2bcf6f30a7cd436d1fa728d2288e87bfcde82e5f4e9570. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZHN32205243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eabdd112c3f7439414a0aa67f48cad021f07368c6fdee841055bf75ea1604d0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHN32205244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642b946e3f345d4575073cea84991951cc3a9072617ec6d0d48a669700e1d316. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:58:16Z), 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/QZHN32205245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bb4d89d6d17fbae0f3662713ed17d5f34769d7af83640715510ca18980a2d7. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:41:19Z), 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/QZHN32205247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565e726ad1ca70b590f46cc5dc15862bf07e0d655dd0aada2254afb854468979. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:48Z), 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/QZHN32205248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dff4f499d670409adc81efadfb1d211b553d8c248841fba4be2fadc1b424e1. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZHN32205249.