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 0xeab1c317427502cb0eb05cce469c8f24806d315e9a530e7a55604c6fab47e065. 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/cc68c7bd-4748-4784-85c5-6af9462ac8a4.json and https://artists.proofprofile.net/proofs/artist/cc68c7bd-4748-4784-85c5-6af9462ac8a4.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 0x63e257566f782f3d0484acf830816ba0fd1183d5fff0d1db02a67a92c0550369. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZCE61861529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e5532cd66147dd509522be0cb64bc1ffd523d362390dfa8735d8a471f1ba54. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZ9JZ1735378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238fb21f77b111748c85b8ca1aed89e38c8ae32db318d18baaa22570608fc1d1. 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/TCADO1895639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1252aed8ec9ba559363dd2cbcba73b3e1cbaeb219c18e219640773fce22ec1f4. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/TCADO1895642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780582706bdf6be000f736382ea04ef7360c13cdf30e6abb68eda3daf090b2cf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCADO1895663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad4e8f088e2b3d55ca2cdfdec43c2928939883a6756c557d6f002144c79109. 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/TCAEK1913180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545debd54fc82b28910f978992bde8df244fdbf9b0dab733c28319ccfaf5c675. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAEK1913208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc22d97f80d7542f62b896f0989420efb10cc967bd7d69b7f4ea23a45d91c51. 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/TCAEK1913215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7d45a069d7775d703e7228a249f2bd315c46971f1104f0e43d813fc572252e. 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/TCAEK1913222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bacd9731cb10381ceac8e90e01ec139758f16b5748b048d652c865104b7474e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEK1913223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f3b61c9ebf22324861dc1a06a10357f3b717280e56d2e79d09712ac3fb4570. 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/TCAEK1913225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e49ebf92d3fecf457f836e7c4348c5ba9f4ceb26f2d67261c0a0e410591800. 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/TCAEK1913233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adbb0b4ab35a32de9d4f6bafb02e4fffdb01c58a0f392cbca364416d07b1e7a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEK1913237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87554e312d39ebc2f053e4c955a36eb0ecb9cb36fa97405791bedf04b8c531f3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEK1913240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fc33b6a5c876165ea845baa08e4d7d137bc77f0ef7cdf7f36007a897b15919. 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/TCAEK1913241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5e04715e2d5c6c7d35257fb71f30582506d8d10def1b19e08bf9603e868a46. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FIUM72200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e4388cc0d2994540c50be9964c78d20a6557fb17e6323b070ce49a3177c338. 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/FIUM72200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9748f8b88fb87eba818aef17379464dc687d5ecbf746b0c9c3a6d87f76be5880. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIUM72200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6b9b2e58a9aac137a6eb3361f3cc3c38b8b4babc260de8b6e4e95b972fbada. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FIUM72200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87e2b2d426c859bce04fb5b6c6cc7f87092518d9ceedaa03a4393f28c6e471d. 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/LVUM72300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e477381a4c5677e15f0789a30dcf1ac62367690c9cd50f5341b6c9736d1091. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIUM72200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079fb189b7710700f878cbf985a308c4b9096bddee331f0093ff7b211ae7dfa5. 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/SE62M2396941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0084a33fcf22d1681d6c14e1f49217daf9ecdc65f892955aeeb99df0686e28. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/LVUM72400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14731f76debaa9237da27e0592717842ba370f10f342af6951be7978a8fb1180. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFJ2314554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa2ef6fdbcb4cac788b1c770699bf022574b82adfb2294d23c91b475539d7ed. 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/QZK6N2088197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cf3fcd70cef104991103f431080cc4831bc9846ed8098aea41867b23912af2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVL151804543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b50b304bf670fd34fdcf870df42f07ccce4707a6155406e8cf486da1974fbb. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZFYY2184724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc8eeb4fe5e1ff29a7441b4f7a8a83e62c3979f6f5b547f816981bfc34da47c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVL151803108.