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 0x928353b87622bddc3d0668ef7322279725fb2056c75183939a1738a0f93e1077. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8faaa643-5d0e-47f8-9a36-95f5c0d6e52a.json and https://artists.proofprofile.net/proofs/artist/8faaa643-5d0e-47f8-9a36-95f5c0d6e52a.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 0x317182c26d3d5d5c68c241c1ffef0de2bb99abd6c968b761693f51052c4e37bb. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM24S2307100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3b4e767066af18f829e2eaf3a04c72b90ef85ba69a152dad8b5572e64a7df3. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:54:27Z), 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/QM24S2307094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c3893ea1795314bd6ff907b0d88559f8239e9b22f16eb23e94f6a717d791d4. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:42:35Z), 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/QM24S2307093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749268720c3f5c399b064e01fc492736fa39ef9f71f7b96de6cc62f891ec75a2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM24S2403890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe179c261046d69987300ddea8e85a963aff996a1576fd5181f8fe428a461d600. 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/QM24S2403884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc8b5b9be694cf5f51465580eed7e541d4b283a5e56f699776bc5a258249e1c. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QM24S2403892.
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 0x3dfdf74d8469396e08363d45a84065d9803e774916c416c3c587e5475beb9cbd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM24S2403891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2186ece6924a60d12cda33063ec8e8853743852131a01014d48e3e317bc26279. 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/QM24S2403889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab426d1255fa4b667c2a475027ab30ad6ad44f690aac3688e7f7b8b04ae2d9f. 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/QM24S2403888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16b1410be13e9ab6a6fbc49efc84e4c316d163899db86b45490ae2ecafc7d4f. 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/QM24S2403887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5029119eb1fecdc4c710d3f3d0e497b03a2a2802874b54ff67058ffc0dbc8f. 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/QM24S2403886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b4c06ae448b9289cb715e2ec5d7e8c886529b8e5076f1eead5361aef362260. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM24S2403885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ccf0f062f7cd42e3cd67645d8e8fce51251b77ca6ec54902b78757f83c9d19. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QM24S2505662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bb0d6e9399f59fceaccc07d106638c31e1e56dc35514e118688e2a7c4a28ad. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM24S2505661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c300402e201492ebee5af25ee7a6c210bb3adddfb3860978e49cbb7b60172b. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:04:37Z), 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/QM24S2505660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba09bbe1484842f36d6155ac92517f4d5ca318a383c40c43f7de217dc8d49a6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM24S2505659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2bf4dbe0c025e343ae1ac6a8a62fa925fb1f8c4e88716ce4c2fa38379c1f6f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM24S2505658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfb6ebba1c0f28c6c0182808cb6fea82a784ad954854fc81681e0a1b2104fba. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM24S2505657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba40fecb5c4907a8f04b7d628920e9c5f3f3b5e8bc04950eb23bedb302bf62c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM24S2505655.