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 0x07f9176e6e15db66c37112b148da013469d6c4bd63188250574f7583cd60c299. 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/7c5927e8-f38e-4cd6-a6e6-2272ea87bdde.json and https://artists.proofprofile.net/proofs/artist/7c5927e8-f38e-4cd6-a6e6-2272ea87bdde.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 0x392c89de31a52f444bb415b9265b8d630efd1cc45a7e36f425e65b1b3a139715. 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/QZES81872165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6c2f61afbd6bdb01a4f8447a585e787211a3cc9dc1f5c4967561281c7b00ee. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES81872166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7915a615ddf3e9e93afe51f432952b43e29ae07cb843dbfea05f4239011a01. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZES81872169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9a5d486537790023c789047547885b03c2e388330b92ac6a5c2e6f3f0b6d18. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES81872170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a03026bd39949a0c179d0a23ab00d634808545a39e46b11ae8c69e1837e1f15. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:29:35Z), 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/QZES81872174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2cde7eb77feb1744447e212f7d74b3e4110af2330fae3978c63cf370e19ee1. 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/QZFYX1939413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc033d17f3652bd24df0100c3093dfc0d2c024d1edbae20e2a23757456cf579. 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/QZHN62003384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaad14a0cd8cca630b8c844869f88b00391b719d23d97d32204e2b9232a7fc73. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:58:27Z), 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/QZHN62003385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a75caef362e5c068f52186445701eb15d36b1139efbc276b50e147a9c678bf. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZES92112111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbdbf985ac563fdf033b596244498bbc47705d5789acc429e56ebb0ed3ba1b3. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/QZHN92115593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb407131d4c5b1560fede19374140fe270f15ab446306febdcfa6eeb190668bd6. 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/QZMEM2147409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640eadd04c9ef186cac89fa90454b51b14957bab1deed26e32b47bcfc36ce95c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB42293903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ef993939e6092a74cd01b8faea6cbba3c61c544e54e5260c451909fa81f8e0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6G2041020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2bd6be695a5c61033a3c4f28d31be9c865076ea3d6d199b14e7b07849ab036. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAZ2306805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe6af4b870a9bfd9f17b3bf6a52acb1e343a2a57f438bb9a62b0fb5378aa27e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTB82444763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5ff8ba46aa268df1318633159b4efbeefcab96a39975e8eac0f7683ffb109a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT3EZ2499442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595914dd6e4276eab6a3da5cf802b1b3344598fd3127c10aa5b3392fca11ad9a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZHN42546603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6553d57e295f2666d250b6c7dc0c03e30c883d7b391ac51c8ab478c5a819eb9a. 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/QZK6F2551019.