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 0x758fd1c7bc78e751494eb9c4f7e2e88b2add78d13161726805731b1b8afa94b3. 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/033daa51-cc99-4306-8b76-b46ef73d06ec.json and https://artists.proofprofile.net/proofs/artist/033daa51-cc99-4306-8b76-b46ef73d06ec.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 0xcad0c711932e8d16cf68f70ab747027e8146834b477a9cc35e272ae9d1424c21. 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/BCE7P2301067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7221df2b1c7fe7c8c0828c0ec7236ea38a3b41f1f7f94377c146389c0afb04e. 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/BCE7P2301068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45298ccb3cc00a6147930e82b6507cdfe768e099be8cb92ec5a99a7d840abed6. 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/BCE7P2301069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd522b28a2a5d8d61e1fdc1bc35cd152303f186ff4b943368a55474e4fdc379. 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/BCE7P2301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b933de46d0447478f14ab6c7ae3f08396434171d09c07ff2f5baf083e11f0d. 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/BCE7P2301071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb289c66481d539e14d0d3e11579f9bf5c0c4ef435476a7cc887ddcd0d6ca7f35. 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/BCE7P2301072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6366ee798cebfe6e20b87646378bd702680ff2ecbddefa0314c8a7929148d3e4. 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/BXIV82452509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4efe27beca2ade26e924f46f925ea8110a1eb1c5a30111083851e870a38d828. 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/BXIV82471096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73852f4a72ab66e31fecbea4e58072b39c01ade314c5138f257c5f9c63dd1c07. 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/BXIV82469105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94a198181edc4770bb64d29ae92c051e0ba0a9e6bd4fe7ac1a8ed4912dfe19e. 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/BXIV82497219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bfcb49cd9b7574330566f89ed85a1d6ff6deedca9184013d179d8798197ff4. 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/BXIV82470090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504cb206edb0b8355aa67fff45d9309f2dbe73200de700c87dc148da3b7b5bcb. 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/BXIV82467878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26541c39c9cd1f6e3e20927d79882bdff51bf02bdeed3d12bd85d01a9c57bff6. 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/BXIV82454423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4c6808d4bb179343d2d25433461d8c87a0836596faa55d2a7e877e227f4ae0. 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/BXIV82473021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21852aeede088d760003b6567c97b709a70095e1f6e2ae37d51884f845172dc0. 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/BXIV82441988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb237dc69f510cdd19f185990013703bf365b986b3c0c9620944c1a449360cc5. 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/BXIV82450088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b529659aedf8cc7e0c832e6269c2cb28faa002c6ad3a7b59f5f96c5520b3b1. 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/BXIV82463972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491d22af664f972419830992fe3e67ed38c14d2897df3b5bdfe1d17a3b7f4b21. 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/QZTRX2444145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9170228268f600fdaf4b40f7cd7a56f82fb461b41b04d1392916d45a972d8f06. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBRKQ2452146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0943dcec1131361dc91e9344568fddc7583064542dce621e2d03f5db60c8fe10. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBWUL2340442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a238eb52f7f045fe2f3c7a5493f3df0daae40824c41009721419a61ee96af9. 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/DGA062404377.