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 0x97801861900c31b84fc0b4532fb47b27b877661091d19e223b33958001a75869. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5622e4a9-b1a8-4afd-bfd7-d048ac859560.json and https://artists.proofprofile.net/proofs/artist/5622e4a9-b1a8-4afd-bfd7-d048ac859560.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 0x706760d4842c35071f158226a1cc898e449455fb18ca6c80c3d483b0bc7b31f5. 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/QZDA42177099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd659dac1614b2bd1f3ead35fa134f3450f80cab9910b283d03286b7fdd4ba5dd. 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/QZFZ62103845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17a71da866ccaede5b701524eff5a03b4cba3bcbfee22cbbc2c0b03243689a0. 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/QZKDK2008415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df1f83ba8e1dc54588f62c7098c81930cac1c71222e2a7a1eeae6c3aa10b19e. 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/QZMHM2082112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d71738abd75fb30a1828cea09a98a8f85a933bb05eafd8d2273da19b59901a9. 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/QZFZ22153387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da12d6338bc429d24a8dae374f178e7880bef7c2685f11056d9ec80d82442c8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYX2118704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3cc0bdead021a39090c2582010a789fd4653595ba4c296008a4dd9dcaddc04. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS642119913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a5777f1e4e712480dc011360ff302efb7523545071e74be0fbec2b62ac3553. 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/QZS642350334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06763eb60fe4dafa4518322bdb98f11a772f666bda982c090172c619447fad58. 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/QZMHN2376167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644f45900131e35e486c9f014ce65dc45aca5652aa9a0f8e3bac7000101fe9a7. 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/QZMHP2339361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0611b36ff27e00f34e3ac72fb1d36676b5893fdd5ac30a1ba3ee9ce0d806ee70. 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/QM42K2378830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3a843f6d6f6726f24a2d2aa45c87ac237e8ff45bd2c387d58c9283faa578de. 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/QZMHN2354888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfee77578fd68937ea213c8a423105a1050f4d574cc9922c09f53dffc81af04f. 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/QZS642318332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84766cf16fa6a540fd3cf15082ea15149279cf00bc24060a35f2666d544311c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMHL2322624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972a43105969cb85e490cf5b68c4a09630452016ed98d35e8d06e75ce58e07ec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZKDK2071891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c68dc58e0257f4f3953ab02cea318ab1d99ae7b82e8bd347f34174659b57eb6. 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/QZNWR2333567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeab22754c865ed7a5be86ce8afe44173c899fc9e6e66bef9550dce2babc6fad. 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/QZNWR2333569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06290a8a6c6da16016e8100559440c382f051c84d8b65bf12c39423d6199c9a5. 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/QZNWR2333574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ac681c9879a18064cd18a88cfde0f364ca16aadc7aeaebf6ee20382ef174a7. 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/QZNWR2333575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c24372b26ed800b4ee99dcb7f37181d1ad1e073e73313e6fb584d1583b062f. 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/QZNWR2333578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9646394fcdec2cd5e8683e1a5eb29261b167ec2d22c100908246de08727b7729. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWR2333576.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch