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 0xad252ef4367fecc410bc8c44bbd9fd76e7bfefe644de307c3498efe5febd60f9. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/359fa865-9f6a-4817-8e1d-ef5c786df847.json and https://artists.proofprofile.net/proofs/artist/359fa865-9f6a-4817-8e1d-ef5c786df847.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 0xe767c859efbbbcc827abca312603aa9bb186bdd49c6f97b15eabf806c0622bef. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:54Z), 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/UK6822404738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6257608a9e3fa6c960f7c9fc12a35334908ac3524becede6b08f2df544f690. 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/UK6822404739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6245cf9b515f1b830f849e2165ff3fb39ae0d60d857f9ba110867d54f3913c7b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UK6822412437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1e3d62dce61bdae987bf03a6c3dd37901d91475daf9e5f430191b18174a43a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UK6822412438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceab257aca742d4cd9b7cd88e477877f64cade4a3608e1badf5ddc687d9c62e. 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/DEPI82417221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a3ec453abaff69975397f4a73d86be2d71c6c93057cb5ec335f252547c164d. 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/UK6822415705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b8352a7f49308aaada5dc3341a74f62359067f113b175c5b46f268ee01bdb5. 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/MXA3V2409754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d040d3c7601a0e2453ee297b3187cc9380d59a9804476aca421b7bc6af159c. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/MXA3V2409755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce022fdbf5ff0e5eca596054d013c14eaf2ecef0c23ed584c64823ea907d3c8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/MXA3V2410059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b91f5a635a497b952542939ca3d6bc858509d6d6fa306012e80bd13ba7e99e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MXA3V2410060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0901ff020b6666062c61f38e0d98d63b1b533635b5b8cb5e1ead84f216dc360. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:02:28Z), 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/QZS642595594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70ec9fcd6ec03745eb343ae9acc5d6e5702bd36bb2042764d58ee3732979814. 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/MXA3V2413346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1b5b63c1eac09d10780c554b6ec6776dd6635339b33233a9d2fdcb2a6760f5. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/QZMHM2532704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4af5b8109d69ed93d755df915db41e80e14ec5ab188bc5f383b667ad99d04d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/MXA3V2436418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4ca6bb5c0861e12b117aeb9dd61bb73d28481db667ff3361ef95d230ef49b3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BGA472520847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dea9adcbb5ea73e4c034ca0bce5c6e4b6b27fd3874c44759fb5f95060777f27. 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/UK6822512868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c2ac825ef05097ea1ee4351d8623cb0ea8b38d8c30cb669a9656b8c3d07c2e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CAQOI2529246.