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 0x7ed6c5ca5b2ca78be4a0ed27319dba03b40fb74fa6b897d96d734380edfe28e2. 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/10e2fcd6-5540-4613-bdf5-43cf0bd3b29a.json and https://artists.proofprofile.net/proofs/artist/10e2fcd6-5540-4613-bdf5-43cf0bd3b29a.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 0x1d5409411eae87ceafc8a0965ef4d401587ce45e59ba5eba503f4f6215bbb1b4. 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/TWE210303011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4a14d83c27063fc15061ad35c9a3ac98a6fb5e96bf93c80d6ca708e8728798. 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/TWE210303031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7069e4dc4fd26b998a37d8c8c44e39d047432a77f78d4cfa4341a0b433bac99. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TWE210303071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c313a35cd4158ab13436fbd66dd06a67088a5074554f9472d237d07182457e2. 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/TWC230107211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38da27b22b2f4a168367e154b0cc82d7c7eb7b2241b1ed776e37b8678198ee68. 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/TWA470532005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc77e675567fa87e82fde2cfe237cbfca44aecdace99c42dafe729a7da710351. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWD250318602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbcc2b2390f079c8bcf26f6f6237f72ed6234c50600d4f3bbede5703f630fcf. 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/TWA770400317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2535f3dd8f67857e01a8d399b7f6b61dd911cd8170f48e844ef703517e7b098a. 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/TWA470441002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc758193bb55a3c1503cddcdf588b665fcc1d443bcb9878d95c332e6d94a0d438. 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/TWA479831027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f00f2bbec109ed96375a4f889a6750bdbb240e256d5f636348f18577aed1af. 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/HKA419900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963e49dc204f557749a9bdf9d00bf13086e405a52e97350d1e20b314ddfc9bd8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWA470314001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fdec26185506519223a148ba545479ac684450e95a310c95f70f2d079150f3. 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/TWA470533003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5833b2bef8051778cb37be3d4616f60922b5e5900b165fa9ace311543ff7d6. 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/NLB630100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33296aae4b1d38e746b69b4615a7eb4e996d575a0955f72a9f60f81862e1d5c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWE210302021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2c8f836fe83f3d7831084979a7adb0bbe73a2cf3f0d667f4f2f381056e8193. 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/HKA410200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632865a81268de63447672e53e762f961a51df350e8cc98feb8c1b1a5dbb4e14. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKD040000342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4015ec13705df89f73ae36b8897730397bbf55a3ddb2251b2c5d8c421a2d199f. 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/TWC239980307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac30111223fae9d2df347cacbb6157eb9aeb7ff7f4ed5d9156610678ce16110a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:50:35Z), 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/TWB070101005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac01040229dfe27d7c1fef25b1ba01ac63cc50531a86d8934c160dfb00de311. 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/TWA219609313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008f1c86288c1e1526544682baf23bc63e6b43334ea3b174f278fccda750254d. 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/TWC239980303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4f47e34ef219c09189f1de4cc208910d06fd8922a2fe4dd02e314a77eafd93. 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/TWE210302011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33296aae4b1d38e746b69b4615a7eb4e996d575a0955f72a9f60f81862e1d5c. 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/TWE210302021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1107dfbdc6a6dff06a72b13c9a60c8056c93c20385285cf2eac98c7e9ab5edb8. 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/TWE210302031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b3919b7e406b15cab89ca78f4d5ab7b8edf6de3091c0459278750253b12c6e. 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/TWE210302041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307033a1dee60b94a3be3ac36431265a8dec24af069af71a86672d5cc93090f2. 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/TWE210302051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7ecfe59f0b637feeda437d4e590b0239030d6cb3b64fb1fa5024b0d39d982a. 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/TWE210302091.