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 0x52cd59981e9c5f32a9b1a5d4b8eec83f44937a7028e11c48eeafde953f768cd7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60091f1e-0c11-4e59-ac6a-6c5539841735.json and https://artists.proofprofile.net/proofs/artist/60091f1e-0c11-4e59-ac6a-6c5539841735.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 0xe663b4bde506906517e436bd0df137cb0efd25fb0ca12adc5407905e111fbf29. 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/QZCE61866361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1845769796ca07c0ebd3b682c5b19600767e51641f273209243e9d0c31db8e1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB62317222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338d1e44901a7631fa087c810f2a5e205cfa6fb303aa029108730a30e96ef789. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYY2160882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c3a64a91a304e6233f6d272e27de65fd39d3c82dc1ab0616424ef75628b981. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZTB22335002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4031a1c6e6b9431f1c75a6162d76a6bd0de5e68ba9b582039635f843bcb7da. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:45:18Z), 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/QZHN82425908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0cbb40209faea5fc3d1870275d2987b7e2e1f517b21bdba27d5af0be55c38a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB32440135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6823252b8a98dcf9e7c0eb0e61c5927daa0f0d32079a944a8a60332c086fef. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:43:25Z), 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/QZTBE2491543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9c5f4377455fa99a025b6c7eece7e2892cd3ee8924b4d64d7656be709400d3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTBC2471136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f7f9f01cde90c7cdbebfb28e198c7f3f753de13f2e57f452d8b3478c146ba7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:05:52Z), 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/QZWFM2444193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf907a6c11cf311a0e4252d81188d09af16b058ea080b2036152403c299cf0072. 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/QZTB52404134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d1b7d6ddc2f47cad1907d4cba475fba7560b1ba702e5d0a2958129969e9641. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZRP52436023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6be32db7b0e38ea52d153dad864485e25d9ceb0d03c769196110c61936464b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZWFT2443981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4a7f5baca87c3e493f7865ebc21fafe9fb9b2db8ce4ea762fd04ee0254ef41. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWFP2443733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6130db91073761923a8a3521e0e03d16e4e3e55ef92ac83eb927884ff24b66. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFT2443982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ab9e7bd2e0645555a9cbf1ca6b6fe44286e8e7dfa3f9a8be3c537079dec0de. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:48:20Z), 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/QZMEP2559770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec4f881b83db0e58775b2b06ff5eaf6ad136a1a143e20407e758691dc3425e8. 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/USLZJ2586472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6adb58314528e1a9045b02ef3cad60891cf46b04680c10534c3b3e07b4672b9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWV32420027.
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 0xe444c9ca39b4798b87a140edccfeb9cda29cd4eb5adeed94a8754c4eedc02c2e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZ5FN2133511.