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 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 0xcefc52b39c89e5991802fdea888bac8db06cbdc4ba07590be640a1f2073fbad1. 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/98556b32-557a-41e9-9435-53282c733b21.json and https://artists.proofprofile.net/proofs/artist/98556b32-557a-41e9-9435-53282c733b21.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 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 0xd5faaf26295a5bdc056617542fe5e5f215cb02fdb27017468f570c405fbdf8ae. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/ES64E2302275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91386ff7c4ed5a600a56d90bc47cddb6cbf8c5e784cab089e98fbd94cc6a2ab. 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/QZW9K2387270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbbc4e8b48fae929f9630b493a371d1a430ae25e0e2bdca7fc0235069f7c5c7. 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/QZW9L2319299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419db5ea6fedb4a0852b5aaf339d868e8c583be2550c178191deb865141dbede. 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/QZTPX2326956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cc594d591b4b84c3af1ae2afe17cbbb2fb871ac85b468bd0b81cbf3dc6c2e4. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZW9L2319300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ae4bb6ea5136cf48b45da3d657e7c7e28c4f6d96d06010e06c16069d10d069. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZNJX2394521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ac1b3fbf0462d1525b9e736545ad6b89e48b60f8ba9f7332156392b3297388. 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/QZW9K2387299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5faaf26295a5bdc056617542fe5e5f215cb02fdb27017468f570c405fbdf8ae. 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/ES64E2302275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1577fb67e3a6aaaa38b3a497d7b0cd24a7aeaf7dc3f631821aab11a83e662f13. 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/QZW9L2319301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ac1b3fbf0462d1525b9e736545ad6b89e48b60f8ba9f7332156392b3297388. 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/QZW9K2387299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbbc4e8b48fae929f9630b493a371d1a430ae25e0e2bdca7fc0235069f7c5c7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZW9L2319299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91386ff7c4ed5a600a56d90bc47cddb6cbf8c5e784cab089e98fbd94cc6a2ab. 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/QZW9K2387270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419db5ea6fedb4a0852b5aaf339d868e8c583be2550c178191deb865141dbede. 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/QZTPX2326956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ae4bb6ea5136cf48b45da3d657e7c7e28c4f6d96d06010e06c16069d10d069. 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/QZNJX2394521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaec03a12186d1d82478b6f4b88c5ed46653878a8384871b7643d12c2287a918. 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/ES64E2300724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6970bdce0b102876ead37af1788e0738830bb6e838b951d188d30f90388385. 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/ES64E2205519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6e385124fb7ca29be710f4a38fd0f399936a15aeedad23b5f3f8a29b9b92b2. 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/ES64E2203438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8a6ced4090b9ce2a6d2245c3e2a772eaf4cadd615d4c0b7365add5978e8af9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES64E2204353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e6b7f82d5e25fc6bca10a4ea6fe2847a786e17dea7687e907b10c40c8cfb99. 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/QM6MZ2225952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e33a44f0abda392dad1e95e0d1997fe3850b0f0b8cbab0e7569f58ccc8437b. 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/QZES62293951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3e364685d42e1ab21ea00bb91dbea68b18a35103efb50788087c4a7cc9be7c. 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/ES65E2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f22c6a90227308ad886c057176930bb687abfcbf36f27c142871eb513a9c17c. 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/QZPLR2117958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ab07f0fa2d0f2c9e6ffe774b29d84e3bde7d9e9e94d00135e02e214b36215e. 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/QZNWU2170252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb11df264aa932dfe422fc6fe2ee699fedc32c8b957c07c7fe4cdf89e31c5881. 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/QZK6F2187832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d28d9d7efc847379e3858b3998aa7116071a809fba695922d16abdc4245e24. 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/QZK6Q2142152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1d2823fa24e8c0a3182f8b719c5c08bbe7c210a6a617708d37e809a67d5c61. 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/QZDA82103311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0492026fb7f0d4df7c059e0019097f527fd39ac14f27b295a1b7fb69bd561f32. 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/QZNWT2052909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70e7e30fc17593e07620433aa4cecd7355200ff8dcdfd153c84739a0c56543c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZMEM2077498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b3b021bfacd20abdd588d9b6e6391512fd8c184383b7f864a4054b4ebfe12a. 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/QZNJV2477773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15420dde83a72440fea7dee1d8a2362d95c11dea04e52e836ec285b5da335198. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZ5AB2483963.