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 0x35b877fbf6c107f8ce93a9073c8493290930e84341619f869bca2bc1092ac9e6. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e046e13-eea5-465c-b8d4-9921f9ee1022.json and https://artists.proofprofile.net/proofs/artist/8e046e13-eea5-465c-b8d4-9921f9ee1022.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 0xe59abd2d23481f607f9849d1bfed86c5f1f0362582ca4a5a59898e6205767cb5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QMXDC1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92c7de436429892db1f0e6c561a029e1184c99723a6fdaa617dabc5d95b32de. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMXDC1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534c52918439b32b33eaa926d3509cf1ee7e20889aed7514db91cadf0c590290. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMXDC1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9480d26bd005d7ba68ea751e885acaedce2fac2fdfca26beb2a848493a6ec113. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMXDC1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a7258be08a439b52cee2946bdbf3506ab1ba9655c27aa3a718c9d0a042be19. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:50:37Z), 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/QMXDC1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e201bcbda4f116c9b3224d125bd95a138f4947797b6da841b3876eb6b73233. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:47:27Z), 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/QMXDC1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae67282479758d6feb9088b94e05fd2ffb1537f4e5e8f09fcf8de5589d93b0d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMXDC1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8665b605838790d8451c7f54de3ed4c129164c79225e6c300d8a4dffcdd23b3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMXDC2000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe973bd04624ffeab3d957d16e597829f217ec1db7558be302319ecff2b5a65e8. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QMXDC2000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001b24ddc7c9258a505e6cec90a2d663d3d2b35d8dc818e318b632f8cb9078c3. 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/QMXDC2000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e134f126e05c068c55cc73e5d150767a3ee424470e821c43e21e1062591b8ab. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QMXDC2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b29ab08fd7e60fccb727c8a99c70376cc5f73e8ebbfc776c31a3f1682c11455. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMXDC2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6558786b22ccfee260148a3e86b71cd315fb16ddef0ccaed20ff8d509dd6998. 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/QMXDC2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffde35d10720c0fbbe28fa7adac4e340e3d41526cf5c8ebcfc3b8b1b50e7be6. 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/QMXDC2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf120a972880e5eeb44da98a87bc1c8fb75fe3d2607743ec05bce679e144cfd01. 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/QMXDC2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871b58ab3adb884c6e36148e97ae4244d700a5e1a57af40199a849b682b4531c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMXDC2100034.