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 0x2d4bcd976d2b9b28c9c9849155caa341bbdb3b8c26bff9c6e81db23ae4a85daa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97d24a94-338b-4cea-90ea-0a4ef58c4f47.json and https://artists.proofprofile.net/proofs/artist/97d24a94-338b-4cea-90ea-0a4ef58c4f47.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 0xd2f4c8956b8021c436a1ae578503ed4dcc1083d2886cf672e3a50c452f9b7431. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SKM331700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac72f8d07b8f9b49cabf21924f4a5d8f67ce61f38e731a0bfc3a3e1e3691a54f. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:30:26Z), 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/SKM331900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919303d534cc01cd457df8830d24e7e22b9589339c06fdad5c375909abe68739. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:23Z), 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/SKM332200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96adcccb2c52fafc0ab4ad483d4fda71d46742f589cd28d4fcbc63eb8746c9f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SKM332300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3df20444c8d7fe9675a4d1274218ebd299a687f888ee30b61c16fe4cb12ac8d. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SKM332300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6077fadba306f9e8f5589f1134546dd5e220b4682dbd6f96db5cad5b3a6a812e. 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/SKM332300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606188af976d89282f07890d77950dff50bb7ad1b1dc942bc1ed86fee2e6b681. 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/SKM332300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0d50f5a3cc14a0936c97bebdf8fdce46bf21ac3714df9464fb8044b7f512d3. 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/SKM332300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ee946c6460397225b864550e3f0eb9e0b21cd0c9f2c977dd8a80129caed122. 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/SKG151700416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6360b148329f79f0acc5ecf5c3a4970a0073219596f59e7a4ff8d200e3ad4e. 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/QZN882084085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246214a2b039e220b4c4915d5122a3540581376afba18ebb5561e6a4772d3ec5. 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/CZUM72400423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f01239bd4a822b199ece9f08b37515243250db5bd6b7f9b2518128f854eb4c. 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/QZZ662343805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320392994888b85c00a257030711a0f48dd9edd1faf539af182d6056d4d3a8c2. 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/CZUM72100864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320392994888b85c00a257030711a0f48dd9edd1faf539af182d6056d4d3a8c2. 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/CZUM72100864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fbae22559f275e4c6e26a5bebc30fc6f922d669b78364d6de338b845990ddf. 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/TCACU1655419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73b424f4e82ec170d366b5d2ef1a91541a545cc20d7eb86e6e5e412366c88cf. 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/CZA231900583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9d9c41f1298c00bdad7fcb121b166b858b3aa4f4fd45f331b980b5ccb3b36d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZH441601853.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd49fa63c839ec1f8fc11e436eb59916b11e3280efdbaac2ca3269626cc465c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CZH441900151.