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 0xc8a90d355659f8cd750a2aa233bbcda652e8bbf2af46e0a63d28ba8853d7e136. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4567afc2-d34d-4ac9-9df5-a0650e7b171d.json and https://artists.proofprofile.net/proofs/artist/4567afc2-d34d-4ac9-9df5-a0650e7b171d.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 0x53b04d1d87545e18fed1da1b7474bef270c203675ee875548a17fbcaac245c88. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:36Z), 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/QZNB82273379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d207ee7586ff4a02a69b660bb4e65d630f74a684fb3cd4fe1e80cefec07534. 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/QZJG52386550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9a6ad6331473d5b704e7f9728f8b7661041068635a1be5fc76a4016804ebba. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNMX2326110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39e3ec7e39294202a590ae932f03a1658062e7d6d097d451d2fdcadb5fd6654. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:41:49Z), 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/QZMWW2408343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebed77cfede2ac392600f4235471d6bf027d5b5910b5df43600b13e22ce978d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNMV2453825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde6c5b66586182558c4f229c3a8b183aeb801e2c22eacefaf3825536112e0f5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNMY2454213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e4b586414803b376404fab307f6b551eaca1ca94fd284ba726491987167801. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:47:27Z), 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/QZNMZ2482825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df75612a79efc96784bafc2a8ed6cb603955714f935db0e303f1415d550ae8f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:57Z), 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/QZJG52560623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8653de651bf182e8411aa271ea8d849f296a999ff9f18e3979a206423c731f45. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:47:40Z), 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/QZNB82565762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3fe5d6e3e39b1cbb75b870649247dca511763d8556e62459254594b919cacf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNMU2554202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28443e5d791b6ebaedea9d27a27263128ae810f737e667fb04afc0fd37d07d3. 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/QZNMV2547439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a43d46bc4c6c1cc8171ba8cc1de6c82268ee3a995193254423084935868bbb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:02:35Z), 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/QT3FC2533368.