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 0x0de8bf8e677c4d4b113e9063de9fdb1be9ca795fb39250581cf3b39cb9df3f22. Chain 2 (Bitcoin): anchored in block 953600 (2026-06-14T06:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ecea0ae-7790-486e-9d62-f378937b14cd.json and https://artists.proofprofile.net/proofs/artist/0ecea0ae-7790-486e-9d62-f378937b14cd.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 0xa01263b06ff0982575a5380d8420c5fba104e457959d0da3628cb4d9a48c0b65. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZDA72583443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69db8484a92dcc1099d108bf61cb3c968f84ca0145cae19107be72520ccad04e. 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/QZDA82507637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a4a4e99f53100458635b374d98ff86fd72bbdc530d96b65f9ed2c142fac173. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZDA72583436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd34424952c6311280ee071a40fc6771b886ec21ede1ea295c8490f22ff0c4dd. 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/QZDA82510260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b8456e75ef3abe394f98613cc12760e99213f4a497add49572094a0e0e41b6. 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/QZDA82507636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f677ef474f6a0e429d913fc1aafd6fb2bd1182f8ec6e18299b5490e9866f189. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:22:32Z), 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/QZDA72583438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb096d025977d6ffb84742fd68355a053005c90772414799f22ef841638944895. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:47:53Z), 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/QZDA72583440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498a2994fd2824717df7d3efc73568967013dc3ab935b52bd8c8b9b669eebf10. 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/QZDA72583480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6785b51fe337e5c9de23fd91a7e642b6fbbe97f20d6b3eb5eb7535d384d158. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA82501641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf5963792d9c78065930aa5a597c4ee58ca973d02ae18ed45eacc71fede64f8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:02:49Z), 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/QZDA72583476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e98b7d173f8dcd086c0460e605c48618a3bbada820700c1c106cf5c210408b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:50Z), 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/QZDA82507641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdbc29fbc16aab9f1a5d1d32499cdeb228a53ab1a31dfedf5a766f8aeb84a44. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA72583488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b87f48168c4c86e6a23abe6f138c13bbb22b29ca0dabda0b47a113c5ecf3fa7. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZDA82500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dac5bbbdbd6cb30ceb3f453daf427b944ccfd25713e305f64caf016a54da664. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZDA72583439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711c8c88539b3cc00be029e839a9a15919c4a2a4e9334d6a07d27a591874e9f0. 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/QZDA72585800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8341724898bbb921b5aceed81850e0fe9872c23eb3d75203e5416f46b77949c. 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/QZDA72587658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2879e53418c316e7f4e657863a16f5de77eb70a93b4ffbceca9bbc454efee5b2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA72583486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ad47fc1291e9d6f66006d849fe43a0cf03fc52717355ed047c8ffa628887f7. 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/QZDA82507639.