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 0x4e0a9f0b40f9bbaa58e6a40401bfb0aa8ef800baa63024ec1e961edd0c4bfcac. 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/2a46441c-e9b8-46f3-9c9c-d5d94c4b6868.json and https://artists.proofprofile.net/proofs/artist/2a46441c-e9b8-46f3-9c9c-d5d94c4b6868.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 0x2e91cb5c7a89043196de914021e04005ae4a2ddbac6d863f062f76b22756f34e. 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/TCAFG2066842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9c4708a1d911f478135df9fa24386762f80e09762d6fea32068734bb79752e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEN2109547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8204b8d736af4e0881c700a5436ec78964c1e0506287eeb0a884dee0591720f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZDFP1944276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f083832e7a9fd5f6f9bfa194ec8cd4a8db90c7c143c7efa02e8854424f9b9c. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZDA72284944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde082974a4149fddaf641dbf4289af786b63709368be0f4574b088b952d1fea. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDA72284945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa834154f9d98ca827972057179d8ae1255332b5fb61ee982eff7c938031508cb. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZDA72284948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240ea2b772622c194dd54d2e567ed8a671b2243558e5f7e7b5ffbef488acf383. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:08:08Z), 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/USUYG1391212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43335c2b188facb4bcd87548228310625d310083f9943e76c925cb30150287a. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZTAY2297248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66275d91e50b0cd107d2ed0d8e2b140835866871d4859885b40582c3e364e61e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAY2297250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef02e7289181be23af5f9896d081b6c08458f2d51d5cd90ff73ff8e0f3b02827. 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/QZTAY2297253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2a396d3a624e487017e3b427c18c8db93b6192e4d866da4473b04900a46f78. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB62232940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b77103464e96898ac0f3860142762b6f298ed5e010ad92e86065020277f9692. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA82397391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc5f50c7e2bda99f9de4b02fc11f622c913ab6b64320b68a48361093c0117ef. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB32329841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeb5a41ffc96489ca2857e3461908ca18ec22a456e04bfc727ac558b957f982. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZFZ42427925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f280a008d93268a96106e25caf685cbf9c17d5bf422be9b8559d781a071cde6. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:35:42Z), 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/QZFZ42431061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3e839355354076fd9ca99c4cdd42de2f33305edf09ef67cfa9df1115068de2. 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/QZNWT2594001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600fff71a9a58020dccd327fcbc5305074c01aaa04bb498f5a06c593780eb543. 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/QZTAU2542527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9822a72a213499a75e322efa609389420387cda8002733ce94b6033df406bd68. 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/GBKPL2166119.