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 0x1d6ca8ebad85342bbe125f10871344e8da439efedd7b75ec0e6aa8326be5557a. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66726ab1-b655-4796-ba6b-5922603489d1.json and https://artists.proofprofile.net/proofs/artist/66726ab1-b655-4796-ba6b-5922603489d1.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 0x34e2cbc1dafdfacf042666c19950498b85ad094b7465d3e300917ea3d8685dbb. 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/QZHN62512454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760a006bbef542c421b52c930c797e20dbcc1eadfea066f4b5b0e2aad501ae1d. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZHN62512455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d001bc1d48e56d1d37e537f5d1ddfe5169b15dd462bc7621dfaf2fead8a3d9. 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/QZHN62512456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6d7de30921df4a35fed0c4a5085a3ed39959ae0e7d2d4c73fed9e93bfe96b6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN62513555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12088042c7526dad4ba2d9770084c6899f1a724a551ab4025d79a1b4b943cec6. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZHN72503771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1570da93cdaa7342a62684bda49d464e2845dddea7c012663354d861540d14fc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHN72503772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18248859cc4509d4b78aef64d559126c1fca3fa1dd0b80fd24be5bd9cee4550b. 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/QZHN72503773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf248a1767e07a62097619770892c44fe48522eb83a68604e07c0027dc167bb17. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:38:20Z), 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/QZK6Q2508615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3a180ab4a5cbbf470801e191902f8ca2e6a547059ccbf07a10057d4c7fad13. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:31:58Z), 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/QZK6Q2508616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3733e3d247c00a761d412d746768c8f11b9b457ba26770587719bcb8c118632. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:18:15Z), 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/QZK6Q2508617.