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 0xc568905b1cc200376c270df811bc00b4c731c82500821ff1551c798b5c2efabb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/890acdc3-2ba9-4a7d-ad1e-86811d169852.json and https://artists.proofprofile.net/proofs/artist/890acdc3-2ba9-4a7d-ad1e-86811d169852.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 0xd3d57de229a36daadb32373d53caf65f182033e6237f5526ffdb7a9a13d09d8b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZQAY2415939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd25e01d3cd216917c81d8f7022bfb2ce4de5070d459e1765e6b97578e54cae9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZS7J2319795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7ba47627dd7fcc4889f4cbd7673ba86b6c27ac51725c20f3bc160b18f3d604. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZQAY2355777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7ba47627dd7fcc4889f4cbd7673ba86b6c27ac51725c20f3bc160b18f3d604. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZQAY2355777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a686533b2c838d7f5889ae697bd832951b7aa152afd4f9577078b75681718ad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZS7J2336580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a686533b2c838d7f5889ae697bd832951b7aa152afd4f9577078b75681718ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZS7J2336580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaabd50be9ec0d0e73098f513c606b233adf2989c63d5dd209137085ca841328. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZSYP2203918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a11d808ada5c940d94d390181afe3eb9034022bc14ccfdb7f4cbc58795ed5e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS7J2235043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaabd50be9ec0d0e73098f513c606b233adf2989c63d5dd209137085ca841328. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZSYP2203918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a11d808ada5c940d94d390181afe3eb9034022bc14ccfdb7f4cbc58795ed5e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZS7J2235043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a11d808ada5c940d94d390181afe3eb9034022bc14ccfdb7f4cbc58795ed5e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS7J2235043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4662c160f8420ffdbdc46a8e3e3655e33e31c06d4d527ff0e485e478f827bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS7J2141110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4703e96cd1561c72da370d335e72cd3f87d400dc463a7af170669aefc768513. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZQAY2144388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf283646eff357791b38225ac471ce048dded93607b77d766dfd3a665f9062b07. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMGR32247297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf283646eff357791b38225ac471ce048dded93607b77d766dfd3a665f9062b07. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMGR32247297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0cdae154ad137c1a88d0ba2dd9054f5c73b878afefd8b1660ca357b6ae0b57. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN62098873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd172e4426f631287af6a6f6be2c8f38ffdbd76e567f4f4c62e9c9e00c52d3e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ62009575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf0c0962aa0f075b3026fb054058bf42bbf9888d4566b942692ef1e1804aac5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKPL1954184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960a267f263be9e34ad6adf54a500377fae675953205a9079aa69e4036c0a855. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKPL1827220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5900c12234d3a800bbc3f204e97953287ec26c0759e8a8e7ec5d903e2f63f34f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKPL1954182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960a267f263be9e34ad6adf54a500377fae675953205a9079aa69e4036c0a855. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL1827220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fe72ba19f63ab265cb5c2d41774ffaaf146155e05a4137a1c773aa516be5b4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:17:21Z), 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/QZ5AB1995574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067539fa5b337bfb4374f96ee18d001d3b2771076df4aa38efd396d8cb9bb053. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB1902777.