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 0x6bfd8f9cdf135fcaad0fedbdcda273810015e55a9c664c4b997e767560486e4d. 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/830d80ee-e1da-4348-a491-96f5d4271246.json and https://artists.proofprofile.net/proofs/artist/830d80ee-e1da-4348-a491-96f5d4271246.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 0xaa3cf839f3628c924c6e6a2ab5a484911ac2cb9bdffdbe41dcf6f8b8c2437046. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZPJ32105782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3cf839f3628c924c6e6a2ab5a484911ac2cb9bdffdbe41dcf6f8b8c2437046. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:31:34Z), 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/QZPJ32105782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b091a9edbb4de37d818467e0dbbd83a4d2c72b294f172fcac9d17567fc59c12. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/SE6I32482672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1010e590b49e64f03910b7ba292345d8c06e1d0b5030ec11bac148e891792d32. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5752463148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af67d45014fea3d840ef126a834b21aa7aaed4540c8fc2bb65449a782138d79. 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/SE5752496621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb41d051a82de14e3bbb69e654d819b4a52c0af2f64743d0e2b3464e6ea72942. 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/QZNWZ2283705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965c1642bc96f61617dab3e383d1d81e36fa6b50431a7526d32be150268f773e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:10:54Z), 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/SE6I32402590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc03fbe065685b4bc0de89f9d2beb2ba32388db4d22cd31e8f128e90fdf5124b. 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/QZTVM2458397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc03fbe065685b4bc0de89f9d2beb2ba32388db4d22cd31e8f128e90fdf5124b. 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/QZTVM2458397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be57bc4dc4b6412d3dd610cdeeda1833fd43e79bad4de5762d9d350722881d6. 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/QZMEQ2241864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b91f2d5d3cddd4faba29b50e24e0c66e9d954ff6d2de980365560ca52ab711. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE6XW2414630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d52c98a5e0a74fa1989dc76e3e2f051d1462ca9d1557bcff66f48b6551d213. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/SE6XX2505104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb7e17bb23e2369e7877f63c6b297ce2dce8ce471b08f5b809da1ec4991b8b7. 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/SE6XX2513756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b91f2d5d3cddd4faba29b50e24e0c66e9d954ff6d2de980365560ca52ab711. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:26:42Z), 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/SE6XW2414630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965c1642bc96f61617dab3e383d1d81e36fa6b50431a7526d32be150268f773e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE6I32402590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb41d051a82de14e3bbb69e654d819b4a52c0af2f64743d0e2b3464e6ea72942. 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/QZNWZ2283705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7f98851baf03e00562145780c508a24c71fbe780eaade0ad3a70c61a2db91f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/SE6HN2449102.