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 0xb4bcc149284e227e120db6537ea01fb60d16e68d952427f2d3191c1529384c0e. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77c3e1bc-18ea-4fe4-8c1a-df3ecbb7fbba.json and https://artists.proofprofile.net/proofs/artist/77c3e1bc-18ea-4fe4-8c1a-df3ecbb7fbba.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 0x62493747db917a4b34cb470550bb30b1a5000c3656ccda8430eb7ca7660b1b24. 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/FR6V82008775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da8325a26720edc6ded5fa0de08394a4c87ddefbeb3eddb71e00275a8d11be7. 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/FR6V82008776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162907c53771ce3cea11928684ce26567fdb564aa923375d5f0aef6db820f324. 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/FR6V82008778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b7b1acb505db5fdb0f14699b0b0d3cd8523de5d3ee3ec6fe874272f4211500. 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/FR6V82008780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9106fe0dcfc931d3601537a966cdbfe547ef75173ae944362f1dbb2f4944d86. 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/FR6V82008782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ed58323d8967aa076ff6c33caa06a10b727558aa42b006df5d23d62075581. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR6V82008777.
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 0xfa895d4ff5e16a5da3d863ebc390dd3bf6c8049c4873c1671c23e2c77fb819fd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR6V82008781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9193d7ceb811feb0a7c74619a7e4a2c9d559adc783e326476ae0cb831a6ab850. 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/FR6V82000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169ba91635fd13c85c8e2543bcef1f03a1490090695a8867d244a8e24e1a06bd. 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/FR6V82000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77a8134baddc0f57c16b23f748b8218acfac5c62fbd6a9711fa582136bd4824. 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/FR6V82000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40637b530157cb78f424db6c920dfcf114e412216e4c8a55cc88622193f63c4d. 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/FR6V82000167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a37285c98d9efa7dfba49a75f05003f955ee69e83e81d76db2bbc72ce5b4f7. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/FR6V82000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dd0386ad22198b028128ed12740ca50fa5c362daaac9bfb534b3ab37562bd9. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR6V82000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97aeeeb5357f16dc8b0c57ef565d98d15eb79eb16280ff8ba36a605be88266d7. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR6V82000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac1ffebd1a69074eb197caa4a114e1de4d4bc0bae1fda595f1a0a6b668f5c48. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR6V82000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437c742559e0ff71096b7bd1f0e25093d2f9b2c9124c4134335db7c33999ddad. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FR6V82000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f2277c6e739e245cd342a7a49e125b91c580cf55f9c751e6c2a162331217fc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR6V82000164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daf141211479f98605feb0e6793d72778bf6671a0eb25a1f6925d654026b567. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR6V82000166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd920e6112c007591637d962536b3a20efe52edbcca25b074d6b2ab278e3bca. 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/FR6V82000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5f23565d2e4cd011fbaf9720e58fa1d00351450c9ec5046dab089b8656998a. 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/FR6V82000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269caa48b591a0f7836d8fee03ce76b0f9c681e6ff745f0de6fce8ba9be2d682. 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/FR6V82000182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ec48a5290d6e4dca579e02714bcbd3cc013121bf7731f84a270f7b29dd4acc. 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/FR6V82000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4231c2c59ec8d087cf1ebdb7fc79b70d8da74511a2a82c4f3a25b50920741ecc. 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/FR6V82000184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6b0c8f4d77f17c7049b4a2d4a52701781dcf0ce082056eec980cd33a53473d. 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/FR6V82000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2484f6cf8cef9864791c5712f3bc7402777973004d171a003b6a018cf0cb7aab. 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/FR6V82000189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8904190b63dbc4182eeedad678d483eb818830c6850023eb4d60a71c347598f4. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR6V82000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f6adbe6caccd47e2f1d45b8b411e8c1bed10215b012ce826fe7d520b50f7cf. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR6V82000181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0786d4dcca4bad40e844063749b39e85b1a8ba9ed5b02faab48e3fafdc3c2646. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR6V82000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54739b371dbaa5c8b26e837f77d967222f2300365f1acfe951ae8a0a2933215e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR6V82000186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0368bd4052ff87143818c7fce4c25ad7a1ea4b339c2ad423327c0f6ad52239bc. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FR6V82000187.