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 0x6fdf067319409d85e4b0527e0670b085035eb500ea97170853144b55c5d53160. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e21d4e31-bc79-49ab-b275-8af233a40f3d.json and https://artists.proofprofile.net/proofs/artist/e21d4e31-bc79-49ab-b275-8af233a40f3d.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 0xa3349f76f4873463117abede4c7aaf11cc8818e2a6690bef7da97398cc51e87d. 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/QZS642276477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235f6694e5a90c84c6f75d7b4045bda52e03cee678b9cb247db31ae54f81f07e. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:01:48Z), 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/CA5KR2477995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc307242a870a6ee64460022f0322fe1c725613a9e7004048c8a3d5af901bf7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMHK2562754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c02587ea5b9a1ee49873a42d06376aabef4c346c8b347996ead0d053437cc0. 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/CACWV2529104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6488b68e0a20886f4c9e3aa8c2e790945255d1c0259d4d467ebe55d127093b0. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/CACWV2529105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926f432974b193aa611414ee9de74339e7cd733fa11c4bb6a05a7213374fc97d. 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/CACWV2529106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70cfc75625382323de985b0d0624f1e169cfef3d68012dde2b98a58c18282fa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CACWV2529107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b85d4c5b5460101c72ae3d3920d470078107dead104b99856cf3e286c08b323. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CACWV2529108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dba47e97c9e2851fdd02c0ea0d9e886aba8dae9855f7282c624bf8d8bf4e7d8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CACWV2529110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16910f2162acf406cf06f54a52952ec3dd40a695344c9b3214bb2038358f41a. 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/CACWV2529111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd9e4b997640cd79406dfdfdc181caf739e8d2abc5b0dc497e70fd0ed24fb9b. 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/CACWV2529113.