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 0xf2465ff2710376eee0b602f2cbae97b54378b29dc2e498b9633e43f83bb7b877. 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/a660eae2-d858-4c0e-804b-bdc8fa7d6008.json and https://artists.proofprofile.net/proofs/artist/a660eae2-d858-4c0e-804b-bdc8fa7d6008.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 0x32dbafc8dd007669f922f2d117e0779e74f1c1cd236286c5632a386178c573d9. 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/USAT22305104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ff1837e3a92560639425ca383132718c5e1bc88f7907397ae5010ea3910f69. 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/USAT22305105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9b5b5dd5fbdc8b2991dac0fa0f5053ae8320125500c807ffce406fa801dd90. 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/USAT22305106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd69ebb9ba4f43f3b7f4686069c30d0e9352a79cbce86fd74a656c0c325d5e69. 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/USAT22305107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5028edd8aa46f105fd9d805b7efc9526a50c2cf6c8d5a7741b00674f04c7cc. 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/USAT22305108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fd8f26460e1fb87510f7d90066b14343e2de1e75b7f86352b6df35124b9ef8. 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/USAT22305109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962781ab3a706123f5443aeef1a4f81417197cdefcda316919013098770337c9. 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/USAT22305110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73a55e7d36d85e0d87be062d88d20da8ea3621366c5e172a2fe5cd98282cb36. 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/USAT22305111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fc4b0b10abf2ec88855b9d57ca3bd44744031d5f9e8987a111c31dfdc5e6c7. 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/USAT22305112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dde99d48752df75101f8ee2f32f212b61eedba39283608af658f5f9f788a923. 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/USAT22305113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043fe1fd6c0ad0d71dfa101eca6d8d6c7a820f8a4c7f41268b4cf09c1adad4c5. 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/USAT22305114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054b2a435ece4d05271a6359bb7af4d27754159e57f298733f2001e1258e40bc. 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/USAT22305115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f16e31835ff52e41ad9b058f14854cefd4a978c0baa8ac6b5bdda1903427ad7. 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/USAT22305116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9a9d5b3f06f95ec442a368ee03b7db20bc431c3acd2b3576f446faca0f6c8c. 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/USAT22305117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdac1036cf85f658c97a6eff69c2501bc3902e7a816294a3892ed11adf012f7. 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/USAT22305118.
Wer Lebt, Wer Stirbt, Wer Schreibt Geschichte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d3e9d5f670671a32be1c23014620276141f9786a153e2684a387028b63f4ec. 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/USAT22305119.