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 0xaf38c3500cc44905b3d3d7b5210ea36c9b86f22b8c95364d7ce358348ff25fec. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/697e2298-e223-4e75-978c-c5fcdcdd921c.json and https://artists.proofprofile.net/proofs/artist/697e2298-e223-4e75-978c-c5fcdcdd921c.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 0xf12bb4d952754c10fddd5380249cb8a41525f6abbaea828ea52f1e5e075a9fc1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2456601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7085256c665fc098246f4b14a857b66278164b6650420978a0c5b09bec8bbed1. 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/GBKQU2456602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2905c28038e3fc94fa63746e278964697c6c158b19a03c1c1eb77b1163b0882d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2456603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbf227f41f2ea4d8654e5eb7b1ce2d267a0f9cf0f84c4201a38b1ae31fb55a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2456604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3099d1642bcd8c6814334fd96f0b87722c4c84e754bbfdf803ab5377f531f6a5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2405525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f2c285dce049b9f5433da0b92f7c1ad0289e42f2c89bd0c05607dfabf07cca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2405526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9056476a998e5a6eb65d8af117447e49d35caed40333e36c5a18cf8799d145f9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2405527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89a60fb138ef9263d563a1675b9a41668b1b4783a7e259e26c7fd5219ab9c37. 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/GBKQU2405528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc051a1f1621b396399c04a9a52d6235f65084ab2557287595d51f6c1e72152f8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2405529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b78feb7c4a21ebb09b2fd9832e28a3d502c7a23c2bb85df07a075a000fa3d1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2391326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532ea9593112aad88fe83f31a0795d326a6483dd7c0a5b5eea6cee9e7e3736f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2391329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6458c39e31083f668f3bba85fcd30c3c4a344430d0bb0c3effa2aee84248c254. 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/GBKQU2368900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd2042473bc2ab2ed0f13e08f3bf2c3bc8649c12fd86ad8b84edfb281d90faf. 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/GBKQU2368903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b0b5dcd9abca9104094711718c2dbba09a1bf04e1e4339db6701afd0f3d3dc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US38Y2435157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea2e511c37bb08021ea310e38bc7da3b669d0204bada369178f1806833ec753. 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/DEH742428861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85978370f7ef9ad912f09e6b72518ab551da145799b91a627eb698e053e0bfe9. 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/UKU932481868.