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 0x6c9baa4b13b0e20c170935e97b0193b508e7442fe4f7e6327938ec80cbe5021e. 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/0eb49026-0d13-4d08-b293-63a73f611279.json and https://artists.proofprofile.net/proofs/artist/0eb49026-0d13-4d08-b293-63a73f611279.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 0x742386911019bc19bf2334b5aff769ef567226f57faaaec4243e4096453114f6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USHM91042223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52f3b849d821ead99b6a5088251b709f2b57f0a3f7d74369e06640e3bda7629. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USHM91042231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6353f45bb7586898419ae3c4966e917ca133f0a6140fb20b6e6c5b80651d10d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM91042344.
Comment Tu T'appelles? - What Is Your Name?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a5bdcff564cdd95653120389e305ad8b50dc8621645764d296932a0403337c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USHM91042345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cea133d1b5b66e95f148b8a489f1762641ebefd13a52f79bdf1aa6e092187b2. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USHM91042346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f4361e65585a81fbea54eb9d74ef076f1cde03d61328f838100d19abc57cf6. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USHM81125322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8267dad03462418cdd1785d56608aa008abad01f9e25ca365d7431450d0079ce. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/USHM81125323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14c3d1b2aac75256775ad1be393bf6f79b8bd007c2005927dc238d3a5d4f372. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM81125329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7166a6cae4956ebcb2b1e756e09590659d79e9fccee2a864454fe44f074063. 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/USHM81125331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3437f42a6a7f42c721d230f025673c5dc08f2acc8a13f3fa715953431f10a468. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGJ1228493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c61056409134bd6c9f78590bfcaae61d43bfbcab4246eddefb524907740ed09. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USCGJ1228494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a0d96b9fee6091eb2060b266fed662a43772074ad37bc4298afd144d48ab48. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USCGJ1228496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56eda926ee188a7b6d3fc8de7aa3435875f094f3cb4e85cd0f3986f2a9d21f2. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/USCGJ1228497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bdcfe4e43e03bf6d9c01503e732752b0a53a0d1d99e816cf580433eba074bc. 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/USCGJ1228498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312301596338af81dbdcb548d8471b8ab1c32a47448b21c817f421ff0c71037e. 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/USCGJ1228499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba497b492b067dd084aa51fcc2beb61a620fd258b44338cdeb826e75f4718de. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ1228504.