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 0x1e63350c529523345981a1de814dbe70a559d3f7a603cf79b765a0954818cff6. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0c6b858-9758-49a0-9180-967ddac30161.json and https://artists.proofprofile.net/proofs/artist/d0c6b858-9758-49a0-9180-967ddac30161.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 0xbfe1be387a097ed0ffc8e742fe4fc44fddf0866c3c969e524ad712ad9a1c72ef. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTPX2456367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b85c7fb8d2ae39f7dd61e866770169438ce3a0a286648a25ab299b1288286b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTPX2456369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb5238da900449eefdfa77a555143c35b777f4788d02155e26fc13f1a081f9d. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZTPX2456371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b5cf7bc23ad5d3d98e37e0ac1cba36de69e3e8df8b5e7deb865cf0b92534be. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTPX2456373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8b238ac8ccc36982888c7a4448a71fc2224afeb664e04b1d5aad9c62bf575b. 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/QZTPX2456366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658ac5fc0c16e33e31c48c8cac31d1beadb8acf9eaa2c9c93ca7560fd2b4f4a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTPX2456364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52c27bd274cb79689c39093c804081bb05a444b0a623e78b064b95afd2e0c6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMZ92022003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52c27bd274cb79689c39093c804081bb05a444b0a623e78b064b95afd2e0c6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92022003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52c27bd274cb79689c39093c804081bb05a444b0a623e78b064b95afd2e0c6. 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/QZMZ92022003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd171dc625f39c0661962ffc96a4a9fa26b84f0b6cd503e56a5ccece48a6b9719. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTPX2456363.
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 0x2553d5d257fc87203ce8445141c43d5febe76a7cdaaceccc62a326a0c804d91b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZTPX2456368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ab297ad358084048a5c21ea7d0f922d131aa42bbc987786215f99c279ddb8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTPX2456370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16970059490cbc1c11464c5aa0add5e34bb7ca2637342a16e67fff73a5fc72a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTPX2456377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae16fb232f57e92f3b80a972b834aa6d4cd978215d0257e3f59639389f2842d2. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZTPX2456372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae03ef2ccce25105b30b27552146d1e4c1e30f6276eb9363a6e59f9c18d42a5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZTPX2456375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4d4beb59bddd4f14444d93bdc0725cc8ff23a3edb523b03f63d673e9f1796c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTPX2456379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c36f9a3ef84f3a35c53ccd93c453c086cb890241912f8d14b17a4da4fb918f0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTPX2456378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289a84332fa3e8d21b771e33b272d32a0b49ebcf6f3f3296e59616c156a8d642. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZTPX2456380.