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 0xfbc43b936fb2c5860e7f9e3536a1849cd820d89ff6eb34895def65a6319c5e67. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52df5705-7e8c-4711-bb53-6c4bd02bec17.json and https://artists.proofprofile.net/proofs/artist/52df5705-7e8c-4711-bb53-6c4bd02bec17.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 0x69b645f50f146cc30771c20e8b6f078bcb3e748f330dce1bf865b53bdd8e2a25. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:08Z), 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/QZWFF2570234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89f881598b19ee640b455af0c6be054c459930acb8fc0e6d251eb94cd060f56. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFH2566324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79792e26aa527c0244a9de166f326b767c6f0c2c6d5acc33606b5e0a2516642. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFH2566326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191ace3056d897c9b91c4e33a1cbdea909120a2404f7ffdc20ba46279a4b129f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFH2566327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bd141a915a3921852ed9f4ab8e686d52c56b78feb7642989f255a69349d394. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZWFH2566328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c3973e43dbaabc07995937f8477e4a8cf6083dfe89950aa668c124f7f5420e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFH2566329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f5d5d055c14f9e10a1095f191810ead2cd0283cfffd2354735e8a5900ccb74. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFH2566330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5102f5202dfe83f3d69ce5e61111b06d8f1d1842f6649e8899fa5b3958fc82fe. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFQ2517390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6220937d2c74d2fc1fe20e5203e9ce51f177067cb9b819fb223f5e6c0d60f7fd. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZWFQ2517391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cda4605145d29f97609cac27d687488089ede5f09438c0a0008081467cb96d4. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFQ2517394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52083ab2ea6a009a2b036e83637004ed0dcda98f3d11c50cbc351d801e21242. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFQ2517396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88ad8055a900e593f42ef19af6f8d94f592654406c093b898b783c18d324b61. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFQ2517397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa2006440dd844f9e1eba39075d3fa886af0f3e05ef94d6c928bf5e9cd61afb. 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/QZWFV2525329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc196cbc33c35e2c9bc3929beb150eb450b3b422ba95493ea34753e4afbb225aa. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWFV2525287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fbd8401c6291d16649e476468543965e34bcee5580423fdea6c96a5adf19a7. 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/QZWFV2523112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b0da984b9516598bd0e5eada4f497bc7b075095f0af25a14c877eed3961a07. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWFV2525362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8084593f89e0e597646f71bf83df5eaacda2aabae948df9c4aae0d29b38af21. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFV2525449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b06d60b674b5c65bd979ba1fa8e1d057665c2581f5493a561e04f1b838ede99. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFV2525334.