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 0xda2bbd637e493656111c71625ebee44b7d82c5932999ad1a3df97706970541c1. 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/65051556-37d1-4f8a-8024-a01c91c99a60.json and https://artists.proofprofile.net/proofs/artist/65051556-37d1-4f8a-8024-a01c91c99a60.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 0x4fca8e1a7cc5ad8490e20a40accabcdf402e5c5275b9a5eecfc29d096201979a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZDA41993332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeaa4c1370ab41e1850bcfce1afdd81a28267718a08d7fceeddacc7a8df6ebc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:14Z), 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/QZDA41993334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1358499a394981fd38ec42a0e5d1ad294ec729a86e241f1fe8325d1eea85eaa. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZDA41993337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f59b0b5fd98611bc705e6c60c4b9000d8524d1e5c39939abbac0b7b15f2b235. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:35:50Z), 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/QZDA41993338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a19aee11575bc115b9881dbc0ec4d72297a1cd27e15a51d4b1dfca4c770d48. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA41993339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53c4be5ff0d7193a99bd7f29db6db2cc2f633e38b5471cdd04a28ff9c8ce7e0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA41986468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f748a1648e3d356800b3244c5a833804d585c398591050fc04199be2d14d8a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA52183635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be5c31b2ae9547431a23cb32317719c264363f3026b6eda928fc189cbf17f11. 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/QZDA52183639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e77a1d2dc9c29da37f8b14fabd72067f6ab2b5a377fe4b5318193f04932d0. 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/QZDA52183641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415802f3c420621df00775b8f9066e48518cb2052b5843fdee0f06c6490aac1d. 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/QZDA52183642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550f4402923a02d70dbcc64410a016d107c7b4ecf94fdb74505192fa6b48b9d5. 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/QZDA52183643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03af36173914137660bd717e568a72ff0e7d8a5684095f970ceed32b8aed55e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USMTD2100508.