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 0x58e0335e5d68649b2e03ec62025401270197fea38cbe0f96bfd5ff899c0c494d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37763ddd-38af-477e-8a61-08bc8b8aef73.json and https://artists.proofprofile.net/proofs/artist/37763ddd-38af-477e-8a61-08bc8b8aef73.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 0x4f06bb8492fd6a5f461bd0885684fbadaeaeafcfbc7299a091a0aeaca4c24dad. 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/QZHNA2499497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8733bb5ec7ee22ff44021fc009be4d2b0b23561a95f41d627b2796f229aa31. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHNA2499498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18f19ff6365d868ba6c647a9234d945e6c218efa57f278e4a5583a28cc93a36. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHNA2499499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5502ecb0ec8750954cc3832121bfd346f175ad53240977397c1436e9735654fe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNA2499500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d81f68aedfa000a951abeed1294b12191d3285c189eb73c7ee83dbf041b6dc. 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/QZHNA2499503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef517d2a38659bb5ceb1088ba11be1fb1f95b928d0c34570a8f933261ee34510. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:45:34Z), 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/QZMEN2428420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d53c9a137418b202a0e6bad7b44dd1521e316511958d58974a68ff57ae4262. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZMEN2428422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1249d73c21a0bcbf838cb57abdbed9211f03cfd7adb41a40bc2b9a013beca9db. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZMEN2428424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b948d1d882f290acbebd84f70c8d89a41fdb35a52fa98f771efef0c1d35895. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMEN2428426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6b850ed6a6bdd9c5164b1220a9b6f948566373ba29923f5529a7ee0ccedbbf. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZMEN2428427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe498848bf35587776bce9ca22efbfe5dac417f636393dfcf403110806390645c. 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/QZMEN2428430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a74f3735f80db335ee1a6b3e304eb6244af0fd16bbca126f050cb752bbf587d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZPLR2454556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad94966c10b6bb8040b50e52edb2d3447d9c26689c2f5c14ed94c557fc2c64f. 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/QZWFR2406758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4754242ab8993e9fdac1cfe69780f8ffff15d80375b084a9385fd624d15783fe. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZK6Q2590601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39863f21cd35e8c2dc6bb5e7cf6d533413e452fef8503cd399b91ebebf15a9d5. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZK6Q2590603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484fce644aca6fc8edcd9cd3df882441830e7fb3fa65ddb2229a32851b3b8889. 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/QZK6Q2590604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ee85c28d6c3365673e2d45550ac5754e941f5bda337ced1d199adcafd57f1a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6Q2590611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c2c973066c17c2cfc7b0d6ac8ad74faf967a3d2bcf566f38cec808444eb3d8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFK2563388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317cdfacc621611827923bb946976391ddd207cb574b6ba53aad192def0acb74. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZWFK2563390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bd7236a566843acc0e2f4a3c0de1bb8048781e32e7ae94ef849d08153cdff5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:42:51Z), 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/QZWFK2563393.