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 0x74ffb7ebb35f17f6faece89dff6225e05f886f18d93a3aac323ff4ed5a71ead6. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ed7d34a-de6f-4c79-bee4-34e1c594cdb8.json and https://artists.proofprofile.net/proofs/artist/5ed7d34a-de6f-4c79-bee4-34e1c594cdb8.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 0xd9c7a83dff7efdb010d0c8b99d0195bbeb825178d48d1c4cbcbdff9b10d68b37. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/HUA791900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f35d353cffdf863e5b5fef9c56cf8e7d1a0fdef0615f8e17b41128b79ef30d. 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/HUA791000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c25f0626b16fa38eb94b1c70ac3d104c30d02fa7ed1b051e96c4b170e15b0e. 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/HUA791100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e01538812684883eba43e4c9b50b56e0c87265d2831ddf1fe50cba452bb5f86. 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/HUA791100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087e9ef89d6d1f6e5d73bf6fd9f1495366cc01af83c85e178f9011b8b624e651. 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/HUA791100525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7d8e811936cc6fc29a5737eef70a398d3d9d295c18cb11904f87aacc1d7a45. 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/HUA791100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc672de1f50438c9869b62b1e6afd0e1b0d12ba86384992d519c033ee6d96eb. 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/HUA791100529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43e7b262b52962013868b367b16c94ee9288260be1a5f2e5508489f6e5ad345. 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/HUA611902930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727506a93fc039a871a7e72a50fd053c7283a2f94dfafe6332e2fd646229df43. 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/HUA792000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb373380d91312c3162a3b0fb226a4f2bfbec620de2811bee1617817b15a7d1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:19:26Z), 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/HUC811500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd3c549c9edbf528b7f4d391f3c810159e83d543aa86931c11d1a1c76d01844. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/HUA182449705.