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 0x9a25dad90405c15bbac3278947c81974df85c1e5077d95f23f75c7370dac0671. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7acb08a6-3b77-4c50-afe8-cff10033a5af.json and https://artists.proofprofile.net/proofs/artist/7acb08a6-3b77-4c50-afe8-cff10033a5af.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 0x902da8dad402d74d1f86ba706904063c8b3b4732e4e03ace48ee6cca2dc6e1d6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZEPW1906501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cef8d0786eab9b4ab5e08780d948ae94ec36b723103f627b7b4f8a7b1dd321. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZEPW1906502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7788dcee725fa200d4ee9ac63d6fccf13a913d823a5429fa6bbc480ebf9088e1. 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/QZEPW1906503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6260fffa0aad9b64f419207b0e20ea8c3d9fed8da022e94e26f5fef27e0277. 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/QZEPW1906506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdc130ecfe174fbb66f5b7ff4e0498f00a6783bbaeb7a22f276a5d53d2ac41c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZEPW1906509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10086c9f00265b43964c745bb6ad3ba768b85852add91d0ff90bff2dd3d0fc8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZEPW1907204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb727da102c1cde012ff4e7131a3226dd02f29bd3ba0b951261fa097c976b12. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZEPW1907201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9ffad89148eb4e80eab0a27d523381041c732c4998a55191eea9cdd0012d1d. 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/USRO21212901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e49d059dcd1396cf0c339e45ee38e2ae151a20087239822bdbd778cf7cbf73. 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/USRO21212902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa0efa3e3e290940c602df8f9cf01f82cc85da8b0342cb2307b7063dd16acf4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USRO21212905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8325628ee261a26c3d8863f26e3b5f0bdb6fa84646cbab934a0a73ff2b187df0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USRO21212906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f01dcf02dd8502db0c376f228b490bee57cc19061e21ad4297a614b9edf849c. 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/USRO21212910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03abf1ff23aa62f0d5dea62923dca5121845d4e11140ff5acf12ed347ed6427c. 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/USRO21212912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bffc8faa605c0d5176f941ece09b619a8645e6c461ae2b83d3b268609027f7. 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/USRO21212915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ff03fdcadfadce30233111566f9196696457daa459f126e829e44edbbae3fc. 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/USRO21212916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a8e075ce0577b9ce09176b718789147feebe9d644a2c55e871a1e5ba4ce629. 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/USRO21212917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381f3dd06a07fa7dddafefe48e593b5672e34eeb27182ef788253e102e116f36. 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/USRO21212918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcc0862ff4ce12deee600ef10d74183d01a09e7579d0871c043941e5517a573. 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/USRO21212919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a7a14e46bef569f26debe79d2bfbcf426a515e4b80d995899e11052a028330. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USRO21212903.
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 0x342321138015fe751a3e2f09713ead6057c29795bbc8ece568dacbc4a0acbb14. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USRO21212904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b2183a486d59229f004905e26d4d7e7e02e5eaf848eb798653ef6dea29fb79. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USRO21212907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3925e3fc6cf23e7de6ce20a818057211bd24f18797f722d03ebf6e9ef2929913. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USRO21212908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084681a79610549f1edcf56b6c20eadb9abc82a5860b91e6a989cf871a4320a7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USRO21212909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113c3f9ac46714e33dd70d5ecfabbb8784157ee02691ef71683d0055b4782e3b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USRO21212911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5db1a618dab7a96d302f551d56ee11b7d103a754f6062fc6d4403d2cb929311. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USRO21212913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef0c9abd0bd7ee77a3c7fb089ca7ebf366c128db35ccb80d354d43aee177603. 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/USRO21212914.