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 0xad8ff4f9a343f795a485d453587e9052b0738be3f8e63574d32a08e913dff524. 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/3aa607a9-1fc5-469f-92d5-1a0ce764b0a5.json and https://artists.proofprofile.net/proofs/artist/3aa607a9-1fc5-469f-92d5-1a0ce764b0a5.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 0x92515c1075621b91144fe5580068be4b55953f61b64f6e8dcf8d26fababe82df. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTAT2386058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1670a415d4474d0ada375632822d3b9e0ecf956caa1888c185ddebbe012b7d1d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMER2458098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d4ee63328f21df108046c1573e3bd92b44a73569273102d75f67b16807c9cd. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZTB72491661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385121ad531660656859d9ca5c6a54d215cbba8457494b25a30fb017efd765f3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFT2401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88a340f961ba415cdeeb124938f976db71613d9406001cb3169f68b3bea042f. 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/QZZ7N2454313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de27c92a5953a5333f66d3025f7e6794d82f45177401351075991ee9f2b5045. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA82552234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa164ec34c0c3b820248e97772bfee7a2c99d6ef4a6a2a89f0070242e7bd89d. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHN32516530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bc41dab95c99ddb183fc443e3c4928af9884e97d81b2e65fe17123d76559b3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN72542753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca01a476ed9a8914a0a19400cb5feb1fae8e69f4bbed86004b6a017af7df70f4. 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/QZK6Q2518862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb7f5354d94ca4909ef731158532383d2bd1175791caed83ed8d9006230c5f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6N2583013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293d4a683362652962bb0dcc3d8acee6378fa6bdf361569d8cf00a92ac88cb7f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6J2535636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccad9b727273b628e95ae5c4d9027fbd28d695265751dcb35151df8e8e78e882. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:35Z), 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/QZK6G2541567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f15643d70a59dd85f7ce5bf2c4870e9bef48d5a3c0daef8599c02fa2786ffdf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWS2549889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8de95fab1e2bb4e27db73bb271bd677759f40761cee828029e8dee3215143c8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWV2589711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d2a5bba4a95ef1df5eee781c2d16dbfc6cc75d34ff1c99f2fde71d7ff6e08b. 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/QZNWX2574802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f988e34c06c3cbfef4e812b9c2a197de3ad9687f387d210c920dadaee10a387. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWZ2583532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439ed1479a2fe0fe469c113d8d597258a2203a2b43c3101ec08f67518494be69. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTAW2583941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba31231ea58c3a05513842160faee2348b09ec9cfb8b239d551d78bbe0b743f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAY2586709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68a92327307bff81f9e2ff3cd1156c12bc9d0d3c5740050c5175ed7d57c0fcd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB82538219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a80f04ef0f16241ff44bf190e9551c72e336bdc52952b4698afc04b68af0ca. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7K2569514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf817ab6ae362fe2524a7eeb7714d3d4eb81132aa325e9008ead8de9563cfa5f2. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT3F72521078.