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 0x5f7d9e3ab268e1ef47c1e8dc6e12876645cef760ada865b1be11897de1df0fd4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/117efd6c-dcc5-4618-a676-c01e02ebfe45.json and https://artists.proofprofile.net/proofs/artist/117efd6c-dcc5-4618-a676-c01e02ebfe45.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 0xdf0c0337e551e5a7d27d2656abf1735310fc391b07b413a603ee53e6a14c3876. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AUNV01600516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad9bb9350bcfff6570abb4b8ae90333cd556ad5990b0284113dd923808550b9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUNV01600520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0687c83899a77801bced6dd2b9f83696c9b99b9c01e8aa795bfa45e1b81337f5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AUNV01600521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7ac819f1feb08bce91e96d5f61b7fe9effed8502f51af4f1bc1719be8b5692. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:43:19Z), 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/AUNV01700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2be8d26bb217325c0f7cba0fe059186d1de765f13f8f0d0d7402dc042df33a. 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/AUNV01800122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fe831e9d297aab6a93a7f8cf131455d763dc5614b42e1a288e9ad65d4f4463. 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/AUNV01800263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fa66e28de5e08e9f3533c98495740753a186cfd3639ba6ce3d63cd36acbb64. 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/AUNV01800468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ceac1f037c275fd0200388c33e5d2d1a60eac2bd8512517794a73c656400bec. 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/AUNV01800546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37d78f8285e81eb362145942c10215e749828b477ce46c3a3db9d3888ac917a. 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/AUNV02000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aee64280dbaf4a77b9fa4a036f5b5c43841251a12dba8dfb17e7e624c8304c7. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:28:04Z), 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/AUNV02100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec73bbd821e5fa1afd4d9718a058de19f3671dc6bce9c183c78cf7f5e8817da6. 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/AUNV02100235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18d359f1c90db16b105bcf0830b1fea79936ece0a7fa7cb577a9622db97ed14. 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/AUNV02201125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66bcbceae6b798be22c0f4c2d613b5ed6e96742c5f4357c6bf3f7c9b7784648. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/AUDCB1702315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5a559cb3daeb56587e5d74029939151f3a23af51e2e4832d0113633f3a9d2c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:13Z), 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/AUDCB1702426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2687e40d38e5d12a08216d6df5da930f42ec2d4b3b933b25cefe0135a6da6e1e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AUDCB2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2be8d26bb217325c0f7cba0fe059186d1de765f13f8f0d0d7402dc042df33a. 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/AUNV01800122.