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 0x8e3bb7327e6321c31c89fada4d0fc4a2d854e7618e75559a386fdebae3297894. 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/c210f641-c9b1-4744-ac2d-c2df0e7b9a9f.json and https://artists.proofprofile.net/proofs/artist/c210f641-c9b1-4744-ac2d-c2df0e7b9a9f.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 0x22a03546ba621e09d0d85b331452d14f4167504d909e877f14b95de36843aa2d. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/FR10S1851557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe431061c56ac127fbb2bcb37a39a3cff443b65fe59d927b6d42ff6d2ec302c0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:28Z), 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/FR59R1823424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5031b904a595c9cef026af82cdf08de9a87b6a56845aeaa9e91bcf5e7a26b4cc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR59R1953674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe766051533484300cde3b61c3197be5ba40372a1b1179749407ef668adcf1a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR96X1915232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213dd5550cdc775fb132e6dcd88dec23a04f8cb11f9450e197713fdd3eaf2bc1. 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/FR59R2018018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94944ccfb6345132e07a8fa513b22c94b1b55cba559b93a39c20a77cd7da01d. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:20:46Z), 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/FRX762392168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061ee2369b53f92efe0e6ef42bd87c7e97ce4cd8af9562cf5b9630fb1162ed28. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DGA062335685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61691dca6edf95b00bf8f9033805cd89ab1e040c46d6968d77ff4cad525548f7. 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/DGA082310046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de8c185c5b7990249d986b60c7467dffecb6699ebd065b52d000934e9e1f10b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DGA0H2350635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd2db8c0a9cc64d82ad80d0978e95e7237fb56607fb0fa5b3f49678a7d65a70. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:31Z), 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/FR2X42482946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2429385a56a1e2ab2621f420ea68d69d9ca98aebad6a6d39d938f38c6fcb29. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/FRX762428019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee0885cd6d7cfddb4a9c8c07b2be1d09e4c4e8421b34c993180434e193a3537. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/DGA0S2468604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb44f60d3606468068827d9f730176e3070d6570c52804167956f7cbc64b50a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR96X2549470.