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 0xcc94b70011dcf7af69dad089f9e25af15761450ca1c95573964fd4dda51bdca7. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ffd0ed4-01d8-4346-b63a-a473990d3ad0.json and https://artists.proofprofile.net/proofs/artist/5ffd0ed4-01d8-4346-b63a-a473990d3ad0.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 0xab1f87cce8c95d7acdace0f833a394c3a2369c2b463b6c309a5516e31d77b8ab. 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/USP6L2402650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455bf529cb7656c8844c8f422b50a8b0f4b46a123ea42170db88683ed7c97277. 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/USP6L2402654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63110d58de2f0bd4b4d8d7e234eb97b8078659d293a24e5403407e0b96e9e8c6. 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/USP6L2402655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741a3a6c69396fc2fa1dc908d47639afeb37f55cf74a46547d52a6e0bbbac140. 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/USP6L2402656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25a063c6620cad8fc488a0d42659cd8d7cd274ec380b1cd918bfa45430b0b10. 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/USP6L2402657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb2bf9352a449f5c03398fa8b66f34dc71341ddfee6ddabe1f4de11a28ef995. 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/USP6L2402661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21355bca3575e8507a393880c494ad6333724a462bc8d5c554a93a557ac887. 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/USP6L2402662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc4fc1592a69b2a018b09f4657384b1dcbefa22bb82e02b4397a51d916fc724. 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/USP6L2402666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9995f4dc4dcc28300694cbc54fa21c65be3836c0f86c3fe0ed060d9c6c7471a0. 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/USP6L2402667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7448c84a359472f7051b378086bc156a7f48ef98b245e108dd51f644ef6fa051. 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/USP6L2402669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bc103ec23263ab9c5c4451ed998868e956bf30f9c9be1e3dd6846d9f2f2bed. 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/USP6L2402826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed4e5535675771dab36376936fce6957a5a012c0adf2f0a94e135d6bd4a7d0a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USP6L2402832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc809c6f1a401f37734d94d4e909c21fac1a1576b69da5aee13a928e47a01adbb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USP6L2402835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a90fae9d7ca335cac6b56e0b23fb19b44701a89491202f60c96318ea48fd8d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USP6L2302005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc487f889bc58e55b48a948bfdefd7d715aabba898cd079e8416aa398d89d29. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USP6L2302008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd900c95abe7f06aaaf2b0a149f277082251982c2e468c83e3c413d2029f6d12d. 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/ATRG72006404.