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 0x1ec59d4fd55fcd79ebb30dbd0bdf9d1574cd62b51546153dc11b4e2b3209f406. 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/9410c30e-5e2b-4ab2-8162-e51580db53f9.json and https://artists.proofprofile.net/proofs/artist/9410c30e-5e2b-4ab2-8162-e51580db53f9.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 0xe1d5548f0afa2744cef8d4c1b3d018ce4e8e9c8a3d16fd7046807e84cba4080a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ52186487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d559b6dea37554478d30cfb8464a63f2cac465b123a59f57539a33ee7c5e4b. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZFZ52186490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd791ae940aad8152d145cf9fa77acb27b76b87a8950b6e67fa6369eb3f8ca922. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZFZ52186493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0104b9ddfbc46463102300b32c790fd6a56a28e69f49c231f783b0bcb189792e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:55Z), 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/QZDA72257281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa7ac5b129234068ac9d76ab5d4f2edcb50dfeca7e53250edad8349d83059b7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USANG2231018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb0b0fdc697fb143384d4af676b5b3f407130baa605cbce6be145a9b714a7aa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKZGC2302001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffbef425d8d95ae00ad9f96f266a1c7625a918e01c56d607f812201864da5b7. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:57:38Z), 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/UKZGC2301730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fa1ad346e27cc83c966693b7e9c092c5467cd300b184b6c2ded954a49da198. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:18:01Z), 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/QMANG2230432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b33ca954bb35cf92597ed0d827be9bb74c14be2dd6bfdb3bf75b64f1ba6922. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:41:14Z), 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/QMANG2230436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa7ac5b129234068ac9d76ab5d4f2edcb50dfeca7e53250edad8349d83059b7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USANG2231018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d5e77d3372a27ffbdc0b3f5d88999fba74e59df7ae443d3872c5054b4e0310. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3DF2469333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1673106f1be4139cfe1e503a6712bc0db4bb8ef90d81de03c1b9bae4990ece. 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/US3DF2456831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1673106f1be4139cfe1e503a6712bc0db4bb8ef90d81de03c1b9bae4990ece. 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/US3DF2456831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997badc566eb944f0d837810650a09205032c1751603047bdd6470288e869429. 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/GB8KE2201702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e2a3ade6b520a5a9f7be6fc2cded1b5e004990250be1e6dc088f8fbc8dccba. 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/QM42K1957410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df2d2ca574c7d4eb7cb6f9831f6da493d3fb84725826f0cc12632005f08ec2b. 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/QM42K1992969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad7d1286974eacc56c332606c42d178df35112e1dce0892a54429107f38476d. 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/QM42K1971316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64f4048ed27d9193e98d211fdbde11783ab8c72ac07ddeebf2d19553fcadff3. 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/US3DF2288972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196f975a547caad9a212e8f4780d02be3beb5b47894282616af211f317db4a74. 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/US3DF2288970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cd332b1fb7d58d4f88fa2138c426f98b77e944c53e7c00a3c08824bffca3bf. 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/US3DF2288971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf58f6d37defbb39e915b3bada3be9cd9dcad1fd7ca9df9abcc971386df7cec. 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/US3DF2288969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08f7a5163370060968a277715e92a77753b2bc28e78d8526e9fae0961c21869. 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/QZNWR2496347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0bf28954b6fcdec5d75ed8ba90d63b1b9d443c335adc377324f6106264cc74. 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/QZFZ32403379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4bcb0d3cdb65c03124c2482e7043b60ea091d66e4f4604a1e1163185fbacb1. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QM42K1986984.
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 0x5e10a60d708a0337dd9ff5930030739e882b7f37b4bcc17f5a70f19dab5550f5. 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/QZMEM2225219.