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 0x46a78aee6e5529ef79340c0cc09c97cee6d73895c89c8acb44200b3faa9b4a05. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6edf071-2d72-403e-880c-521f1674e633.json and https://artists.proofprofile.net/proofs/artist/c6edf071-2d72-403e-880c-521f1674e633.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 0xe1d4c67afb53c7a935bf35d5e1d1c2fc7444d2443fb8263526dc823e9434c1e3. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:25:26Z), 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/QZK6P2205847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37de96f07ee02bdbda6966c73ce923989018964f14088921254143ea5ce580e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:26:19Z), 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/QZNWR2292939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16db46aa6a7354d541b6fc0f09a6f20f988e8287b442d39f124c8d4baa66595b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:50:17Z), 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/QZHN82385061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56101084d7a5cb2f09193f334c709a1b19cfbbd4c80f710949c7c52e492c12ce. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTB72364666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400899f6d54e03574145405714d43eaa02a814f47ac47faee2c333afae1d52db. 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/QZES72440950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedae1393a172a305e5b463537c6738612b4149367ed55aab60c1bb76129bd78a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:29Z), 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/QZZ7N2430457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d32d6dc0af49ed1c2348c0a0a730ce023622e7255f8a59799338997fd339c9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7N2430458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d3438e533ce89caba1655c979f4ee849dba610701128e2f5ac75b53a224b49. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7N2430459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e08794a62018bf1098c2b12454720be3f6944700e41295141cdc33edaa916d5. 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/QZZ7N2430460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf810ab5289bb906503783a344c5f47595472754411bcdb0dd2a3e2798891235a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7N2430461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd9446cce63bf69043e30adcfbe34a00d4037a30966ad9de2c799061d293fbf. 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/QZZ7N2430462.