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 0xc48232d4dcdf9320dab0a91f36355bd5e417052d30e021012d943a9e316f9624. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a88ee746-eeaa-4fc5-a37a-eafcffb2ca48.json and https://artists.proofprofile.net/proofs/artist/a88ee746-eeaa-4fc5-a37a-eafcffb2ca48.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 0x43036ef50dcc157bc17df7744c12d5e3e28216e38f1b331f73433dfdd54aa46d. 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/PLC062440807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d5adad6ec1e734ea284c2a42bb65d16843b59ff4b8e2abf149b4f4fb60252a. 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/PLC062440808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5e444a24c63909d9158b7e3ae960d3c0c4bbbd7dae5e8b651689f867e5a3c2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLC062440809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa6dfe3e74751417504f4e14b7aafa7fb01ac748f7b33e257654888978dfc7a. 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/PLC062440794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25763fd4e215b1f06a3a3c5c307179654618f1c7365818972771d979d6201281. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLC062440795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd83a2c61d719cddbe7e62655a991f4e2d781a14228508f70caac3d58ac99dd8. 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/PLC062440796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0695e09079d2d30a50ff35f32e037503a03b30f2a813f34ead5ad4675ad28056. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLC062440797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7f03d42398e1f01b7ba8f8ed840559cdaa2f38df82731a7f81cd3ef9091627. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLC062440798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f5971f958b94ed6e5786c214f9b2c69cfe903ae2a0f0c501e29050db088f6a. 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/PLC062440799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54966e0848c1bcf8802cd85c69de19a5d19cb483fcd5ead780e3a77fda1c969d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLC062440800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6f4f3ec9cbcc14b5d99d30f5d4b72555c41ada580bf715a298cab8a8186ac1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/PLC062440801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab210e3d192aba0f44ae1d30b93b4c5a598ebd91f6e047be6105bdf4dd75ee8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLC062440802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c1abf61094414018ef69d8b51b8e025022157270c33302a1aff1b67fe308a5. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/PLC062440803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01c3a6e4e8e30ff47130ce0d921855245b2c0e9ff5809e5e5893a4e34fd2804. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/PLC062440810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b6c3f639dab69fbd4273a68b52850f4117e6971edb8a0d4835b09b9846169e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/PLC062440804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea72ac01a1357d0a4abb53c99a9810a76f6ce226e0b73431ecdffb9ce2ee12e. 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/PLC062440805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba9df3c6f82cea49005e89c0af08daa8e80f037a4032d7b2075f5217e089425. 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/PLC062440806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a51dad15df431b5efe8f72dddd7f63e55566af32c1ce66a3196d6723223877. 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/PLC062442997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fe458c2b88a98195db44dc2d1f4666ef37b155b05f8d8671b5b6e9be613227. 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/PLC062442309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2347f21bd6542b8df8cd69196bd249c5dd9d6962579cef68c0446caf3ad88054. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLC062442310.