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 0xd42c872d46364a46900990445b90e1ac08e35c634072e9cd61599361139ca6a0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2ba0dca-1a4e-470f-b59d-dec286f89ee5.json and https://artists.proofprofile.net/proofs/artist/b2ba0dca-1a4e-470f-b59d-dec286f89ee5.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 0x6db7474e8849d4102473ebda7415ab94fb03bdd42863ed3ea735baa04095c44c. 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/QZFYX2276165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44698d6f11707b0fed1b23d2b08c5f77d9f242c542cf530b51e2303853d814d0. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZMHM2248531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6ed3ecbb214b6de4a1fc49f6b555004fb0dcac70f4240851997b764eefa091. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZK6H2275898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75078bcf8f9fe178236153b37e73cd629560163979372032ecba37cab5edbcc1. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZWFJ2316719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8099735f47962b1878d081de409ac03d931dc00474689b66e689dc240c009364. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZFZ42458559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5865662300fb9aa8c613ed89261bb798640059d2052b19fdfe7006d01d0861. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES72467891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4a70d1ca029cf1caec3a894490bda217c15a1a4d451c78a3b54938890132a2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN82491906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5d7575cbd9f3c3cb975870235df3c17614c1d467f2af4b3f93e5460ee39ca1. 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/QZHN82491907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eccbe097b069e671b5af53e569c33db681eca3be1294d68721eb19fd7d9fb4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPEW2452615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc957b340313a53a8886a694f8eae5f021cc87bc9066311fae261dfa06665ac4f. 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/QZPEW2469075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918ed3284ef2aa8f1257e96b6cdd7abd50a4c0c7291f3308f1124d3420e73114. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZPEW2515074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c46a30059908a32ae5f39812aa45eb976fb8282adde3b4b66c9f83f9c569ade. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTAU2285530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae2940f005975e9554ca9ff61e6701be0a894b9f54484033e6fba1f80a15aa8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6L2247529.