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 0x3bb8b02e83a6b484594f9c723536eb66925b8c6064a2aa3988c65307cb2c75ff. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a802788-7250-431d-9902-b895b20374b8.json and https://artists.proofprofile.net/proofs/artist/7a802788-7250-431d-9902-b895b20374b8.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 0x4f2a221f6c4dc6da285ae660056d931bbb6fae9cc25cb21b99907288a2b06910. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCABQ1363036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da3a0c0f72e4c4b0fcfc7ecff06e5bf767698a581d12b89e37b2da4102d70dc. 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/TCABQ1363038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0514e599a4382831bd65ec48d2616f00cb1fe8c736e9dbec8587a97deb879816. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCABQ1363048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57898419572d746a7a299c8f1279ce236497a0a3b63ce46e8a4fd41b6891508. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:57:52Z), 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/QMBD51500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9866b4cc273098519ce22834083fcf47df2bf1cd9ff73fb82eb3622d26369154. 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/QMBD51500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb10ef66d27e9fcd0af8000c9d6b82ce6e0c655949911ffce5ed83e61c3436fc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMBD51500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0488a9ad4730093b12761d56300a9c511bf7d9717c5fb74d4cc06925fda97b. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QMBD51500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282d462684360502bc0255a88b5c3ee5b69e208020e0b7440165abd150d228bf. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QMAAK1815639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b68ff63ffa023af8e057f09fd27f5276b8948da4d79624768fb7af78277b2e. 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/QMAAK1815645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5de85c03c825fa7efa12ae1facd2266606bb34bcec61255916ea5a5766b3088. 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/QMAAK1815647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438ce7c6521a46e324ced3dd49af81f4fc66512a0cdb56e90e9919bb4cc30539. 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/QMAAK1815648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7f3936025633c7d2325397b9143e6c3942b63bc3849a69313ec9ed39d25450. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:19:35Z), 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/QMAAK1815649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6233da5cc2d52109112d65786d571fa130d55ffc45bb925c778327ce8a4109. 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/QMBD52001322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b74dfe3e5958c8a1b05a7e11db05d1f1d6650f947641b4a5ea80e3406140b19. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QMBD52001326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4ec5f5aa57ee44f8319cd977c66b31c3a2aae1c1eefd38b1a8a7cb47eea202. 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/QMBD52001328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c5b010ff59222847ad4aa2e2f903fb6b580fad870d67c1d8deb99230693908. 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/QMBD52001329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82fc0d38a1a2980cefbf7cfdc9631180b8d6e7102df278f114662fc601a794a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAIG2460830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0f72b972a91bc8f28b75a260d714e283b884164476a1fcfa168e17361de74b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAIH2460898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c0f8cdf362306d41748d76ae4ab2d6535557a977ff0b4d5ad7ab565050b185. 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/TCAIG2460934.