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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b918a83dcadc8dc755acbdc83d24a7deeefcd82c257b0c2bac48638c802675. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d2bdba1-6301-4f3c-bcac-4948f4e95e5f.json and https://artists.proofprofile.net/proofs/artist/6d2bdba1-6301-4f3c-bcac-4948f4e95e5f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e0821cd4d170486da6c7790e03caf53e6a79746f0da4ec0bfeb16b336c64c8. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZWDD2292448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8df30390d198f675e9d7bf987aa27f2e94721aa67f7a0ee90c810bcdaadbac. 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/GBKQU2366860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb7350591af0ea1f7b68172daff7d1bcea53da9d2baf243c1bf878c6d11186d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GBLV62308522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d0537036d1457e84da26bd1b66a5bbc79826648763ee541d61824dd7c40d36. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZ5FN2463359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e0bd8b31a6d3d323ef165a3849a23e0995814fedfeac445068a308af0df2d6. 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/GBKQU2432517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4e652ae2d706cd13b5f4ea231a8a5c14915bdd3ae750b6b465cd0f9b54c9cb. 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/QZWV32415286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2639916b79bf2641ea0ed1bb488ff1cbe6a5a8574dd1a10f253c0d4e2eb0ff76. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/GBKQU2490906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4f6b15a7645eea4c80ce17887414b437a13e22989b763758919b7af03961d0. 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/QZZ8A2445161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6e6ca0279fd8f99e2bf98e6026a22c713202bf93dc7885ce74e480f4b22d3c. 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/QZZ8A2422797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7d56811f6ae44f927ef252650dcad2b2809217bcbf14b3337f7165553d8426. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBLV62414190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4707038a8d0e6cd8b2c848ff18dd6bccb5719843ff81768ccc6c48a85989f765. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GBRKQ2597408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cc524a7b36558434d7dca3f5b25cc9a07d783663a5d6598ee3d184a3d06ecc. 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/GBRKQ2597431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399288e33f0265daa04ac69bcdd4730c624b6d709f916d989973c597a2f1eacd. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GBKQU2509538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d93addfea1fe2bc0b02d87cce8cfebbd84a78f2a32d3b8f08df719b451353f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBKQU2546918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0356e95d81cf69a91bca1e4f5d300a778f801ed701f0c2c10eb992cf151a570c. 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/GBKQU2545750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e79acfd5e55f7b3e72311679b1e64e3437a8a1321d56447439d110e475fad1. 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/GBLV62316665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeca4b8e2f3f88f101e0391e1b2cbb48827dec3afb03c6ff936758fb782b4c41. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZWDD2326589.