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 0x41d0add61f7078e756810e0593f0cb0a0969f48eb2199188bfe156194fa195fe. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87d0bd31-922a-4f6e-8bcc-7efe1a39c21b.json and https://artists.proofprofile.net/proofs/artist/87d0bd31-922a-4f6e-8bcc-7efe1a39c21b.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 0xa4d31cb1f484cedf4d08184f386a9967507da24d33eb370868c62313a4449174. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBEA22200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7d89dbcfb687916fbc4cbd7cb76fc9d7e95bc95dd7b0b7ff671221b23fab17. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEA22300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f48c39052f03e1f99b140c9e25a8c7a06eee0cf47e18bd798151b734f080e7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBEA22200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b42f86c8e327f335be14d5eedc83aec4d4a61f49e36d2c9a3949ec8a9e3dc14. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKGV81900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38bfb6f3cb22506163c17830e11c20253320639922e438b20830416b45f41b5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKGV82000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe985be2d7fc1b20ba4d0d875527530045d5c1e904c010fac1b3772ff85e496. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKGV82000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ac3a9fff4a3b35bbafc9260f96593de3660dc495aa159634f831a756a03bf2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKGV82000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1c0c3e6e3459ef5643286d97a9539c00594caf797c838769418a73ccf8a340. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKGV82000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f91f7748a56fba1c6f756a55071caa8caa7b62b1c4e0c79874ea2c284eb5f7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKGV82000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5b4b516be5a01494dd47ced1d6be6aec2f695e6a79be4b63319ad5f8e2a3f4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKGV82000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ef3f34ea4fce21a41a3c37bc0e29964ff5a7b3651e8662245c250ccdc9777f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKGV82000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84b59938c8abb7fd7d6102f63248d4f4c253af7e815398c08a851845ccdf8ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKGV81700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27546f0b01ff5a5273d1db23e0533584c463d7a1f86ee4277dfd3332a62cb85. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKGV81700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4abf6799eda6693922119f5c9222af8490d24dc361203ebe8605dcac766c2e. 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/UKGV81700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e0388d02addba4f8d78f88ccd14b531c6aa9258c03223ed4a62003a0c5e899. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKGV81700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdbb7e3c12fbc86c3cb940c70af3529e6746786a7eca5adb568a29149d97a42. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKGV81700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357faad100f694c1ae7c2a24a3f01bb7f2d1151280c4f876794a20b0a115bc25. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKGV81700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f48c39052f03e1f99b140c9e25a8c7a06eee0cf47e18bd798151b734f080e7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBEA22200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1c0c3e6e3459ef5643286d97a9539c00594caf797c838769418a73ccf8a340. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKGV82000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ac3a9fff4a3b35bbafc9260f96593de3660dc495aa159634f831a756a03bf2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKGV82000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b4b28deb1482ab54f6e0c2d32c38d906d7c2ac020d6d754d5a2e946d2b4a52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKGV81800043.