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 0xae2b59824dad53226ea4448001b8ad36e76e1467614abef6d2696330589c2d3a. 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/6dc24378-6ce6-4967-8aea-f1300e0c03ca.json and https://artists.proofprofile.net/proofs/artist/6dc24378-6ce6-4967-8aea-f1300e0c03ca.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 0x9b15f5bf7d50478317d20f3529c51d74795c289ece51bd085d490c7c6a848904. 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/QZ5FN2214365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660da3f2a474eeab5a571e232d45fd58786fbe054fcc24acf41346610e17f2a8. 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/USCGJ2200978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8357f5b019f9456d498b63d9a89b1b5dc6e2b650360dd86768f5dcc989dc1607. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ESUM72301225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8bab4193e3344f84ec1920694f2b862b5f92b133e4839358bd278235b89fdf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9L2468386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c24606a11d6476ee4948da5466d1692ffcfec13261dfdf609ecebd76f7afa0f. 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/QZTPX2464492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7e679c0495c1ca201c5e2f70138b8ff6d131aa6362a56c9c8c20ffd6a16d81. 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/QZNJX2450657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c7d907c5d950c383c8912549272b2bd8433b6acb58e06fa21289f2521cb24e. 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/QZ5AB2429510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67ad7d51d752204d9382829770f0add8bf305fb7ac262be8e57052bab6b6f43. 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/ES64E2309426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b71a331e200f8b2579ae961120bed6066a9c201759d72cad34a3f29fc60c45b. 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/ES64E2205330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c453e195c5caf745e2a1de885ac74d8f7918fef4505c65f2a15787750423a3. 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/ES64E2203936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1faa467df8d9f9832252070202a9dd51275004df5dfa0c317dd85b496095b5e. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ES64E2203407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558c0c8c51f9607ecbc049576052f1600255a1d9e5b33c5661bca39b9c0d2e7a. 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/ES64E2200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd7588332291ca3ae545b27cd5a5552a46845dbe008fe72258a9e8c3a0c065f. 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/ES64E2201651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb708d271dab1f38095e0a039644db0f9d931f9d68a518446f44fcfdcd414d6. 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/QZHZ52139237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8522ea965dd927862f8d633ace58b6b8697f25a43999d30d142309fc6316a4. 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/USX9P2021568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc9716dd5fdf60710d92d048e708e7a0a62d0dbdebadbafeb542641e5857a26. 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/USHM92036828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc7b24b03dd1d2c45597392c4813fda18c390d45688c002babe0213dd4f3215. 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/QM6P42075535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860ba95c9011638fbabe9e1238c3e41663c868db64a7ea746f64f71d1fe74c46. 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/USHM91962609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5617c836e7cb4f167be859fce3b9d93742a496ee665ee72cecabe089a1765172. 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/ES71G1939048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5a7a6227678cd29fdf649918d0a5659d7c566b964a4f5913632f69e79abfe6. 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/QM6N22174548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363ceecff0a1c06f5b20dbd6ab58b30515b95b9d8684188b3b726de813c45e95. 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/ES6172121249.