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 0xc045e16617637e5cad8992e697b10e9733db918213c0e4b0c169d97fd9f6e567. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd866a8e-0fcf-4acb-85b3-57039a9140b1.json and https://artists.proofprofile.net/proofs/artist/cd866a8e-0fcf-4acb-85b3-57039a9140b1.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 0xc3358bf9a6d046a091fa6b04df46d662e0d795e789a508ce8c4c834724e9b292. 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/TCAFJ2142337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68fd5aa8001061a81c196e4028dbda1edb290fc332b15063e2e38a74642eb8c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFJ2142393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c32854df6afdab13c213f4fe766a0512936ea30557b37196cbde913292de3d. 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/TCAFJ2142407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda6916ad447e85214b623cd5e4d412e2a8c03884f904a073fec7c5ba16c2614. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFJ2142444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d33bfa5ac0ff82e765a972b307be07915b86e55b6e54e8bf6de9f6670fe959e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFJ2142459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41660f758ea8c1a9a80d53a6a5fb7c2e1d9668562784f288707e52f7f65824a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFJ2142465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf6f78f0fa9112c0efbb66967d1e549d2194032d8cc259055b0879867af4ee5. 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/TCAFJ2142494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4709a3a873d8a04f39165ab83fa7be3ffbcb6a00f39cb9e72c968c6834443c6. 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/TCAFJ2142512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5df6e7c80764576f03c04e9ad6c6bafd4855c334580cab501ca3f01b0549b6c. 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/TCAFJ2142523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11dcdfea33b73a08537503050be9892c73918a686f6a56c7b737380ea3bedb1. 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/TCAFJ2142530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8249715783812ed127e63ef098b14b96d361e0a1b8ac306c62bd7abbd8a3e2. 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/TCAFJ2142549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19c9bb2312b03d85c58d40c2547e2ffd34986caa23bc41012a2bbb892705767. 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/TCAFJ2142569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa590fa1ef78321acba8a3db4f15aa5989b194ef3c821d4309c9c2fb9795ecba4. 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/TCAFJ2142574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37960bedd490c9b166750e988c43a1205138270cc8ab86669625e9210f620647. 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/NL3GQ2100352.