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 0x0baafe2c3fbd70719ae3c0c43242c2411b29fac1dbcc4443bd644a51d146a0b0. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f194e243-7aee-499a-aae0-cf0e2c9868e1.json and https://artists.proofprofile.net/proofs/artist/f194e243-7aee-499a-aae0-cf0e2c9868e1.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 0x3fcc2be678f1504b513f7dc60eefd40237819c26de759b0a8bfc044b2d7f580c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZW9K2232069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e30ba137a2180cf0335f3ccc453da68058fe25e25fa782861dab4c679f38cea. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZW9K2232072.
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 0x066a192ec0406ff29aa5a97b5c788b9b3b0dc22d94868d0205688df86434266a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZW9K2232073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8954f639eeae25d28fd39024cb4d72732adfb01913cd9523c4734376059c48f0. 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/QZTVM2139155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b47cec236d6b663320ff719f694a6ce259a5aebaf1dad865aff11af65ac6b6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTVM2139156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c74fd28406eaf24d49c0afe7695888adc5042f653c369e4430640b352b1edf6. 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/QZTVM2139161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ae839d78e35219ef86e49f3dec669381c2b111309205e933153d27e9a28402. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZTVM2139164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648cab54a665637d86e0617b806fbf77d265189cc36ad99e3597e0ba46eec0c5. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZTVM2139160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e707ed559480a7bbee26578a441f202537f699fd16b748629e8ae612f7f5b0e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTVM2340583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed871268d696a3e9e79c4ea70feaa3d353657c5e14cbba43b8b28dfddb5477f. 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/QZNJV2389466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32890f37ef67a3240ee663db89e415cb99246077c49a7096061f221bc1f65e8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZNJV2389464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e0da8cb67331162fa960fb4c477633c6e2e3563ce155b7b5296b6237d72464. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZGLM2349452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d9c6f4c0c351da3a1226a08a5d161dc4389ed49c045720b67b06c778214798. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZGLM2349451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c96bcc73bec8598e9faed894e46178f7835f5682b8647b74a1e17eb89bcad8c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZGLM2349450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb008831d0cefeb47ee976197b425cbaa00b762848ff5a91bc77263ddd45387c8. 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/QZ5AB2309349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222800f5eee862dcc5ba0472b7b93025fdd9d8e886dece690bdea1f746ad83e1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ5AB2309350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e91d351998515a9242040e367d9aa17ed75114417ca580a2e38b39e9c2e1016. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9N2246708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a10b30706bd34a1a8198dcac002b47529ac7e47b0873354cbe98d12f7a5637. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZW9N2246710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb4a3629c4d17e3633f1e1e1b6e2982b7332a23fa88da060760d23a6061d7d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZW9N2246711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ecfd86ac48fc16b08f27aa1534f9b06b0468d761fbccfadce4bb7276b18635. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZW9N2246709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f57406aa25d396a97f56ad54e53f0a214201e32ceaacdf385ac5c6d3c57d38. 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/QZNJW2237640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94586786a5500a9b3ed1d7417f9373a6dcb0a0ef2c8ddf01e87d84724429dbdf. 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/QZNJW2237644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9b4d7be10e1f409804bd3c969633df2ae76c670764bb4fe70fa1ad7a0a6792. 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/QZNJW2237642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf617e1e2870d3ad4852edf453dd6bce2515546ff86443172f1f6c5669ed9126e. 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/QZNJW2237643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f13d027ff52c243324f06de6c5f5ce19374fe9738d8cd41fb4a1f42c9ca8f19. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZNJW2237641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4554a08632e6e4a49b9c5760c0b2121c84f75f5ef92f4d0fa5d4dd90e6a2f659. 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/QZHZ62292559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7a82f72c41b5a83ed52b9508f70dca9d96a67745d10449682bccf4cb053df4. 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/QZHZ62292560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9f275d22d96be33362ba080a4fe43443ce858b74740b2317f213ce8eaa7d74. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZHZ62292557.