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 0x2ce7cb2e4a011c9eef76b97a0e64695a4cb619372969a47348b9c9b803725dbd. 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/78fd1796-5afc-47e0-b873-111a2427935a.json and https://artists.proofprofile.net/proofs/artist/78fd1796-5afc-47e0-b873-111a2427935a.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 0x941289f8b21935bfca6365956d92f97f3b3dfd7e3534ca6620e8a5c301c322f8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CH6541766086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa692875cb64603b26e9d358e18416880bf9548f1c43c71d5b0e4b09916a5241b. 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/CH6541862493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc4ea12d1958fd00d2ef37aa92d3ecb5aaaf5cf2b082bf0b608ab7c97705256. 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/CH6541877350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90fd2b6ce910661eb670aba38b45c2284980471e5a8d6f872fe21d3e31e5e33. 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/FRZ051900579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb65f938edab87ca662e4ae501a737723bf71a047dd226b5df758b4ff1df49d4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRZ052000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e020e287207d33a45eafb1b5a1711cf212745080971b2ac8c96f13871f4386. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FRZ052000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0c02ff361b86117015bca2d1b2628ad1eb9f14910cc4d818b08531fc0f5988. 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/CH6541670273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d0d1ff8f97e6f5207f85e164c2017f8f7e674a94cf42203b723f5215970a46. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRZ052000442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7667c6ba5862e1b2c9e8eae156c39c366390670f09b38bb070ea615acd4223. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:29:33Z), 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/FR10S2264423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f97cf90aeb56bf2f4d89918267e3e9af593923e3b28830df7ac97b88f027ca. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FRZ052200332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f02d0ff3708eae99dd7c3093fc1ed658e83183094822dfe3277fd415b9b9a8. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/FRZ052300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413862ea55bf4012081ed00f7c92f498e41376ce5a306b6c2cec0390c74a8cbf. 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/FRZ052200313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875a311702a52170073edfd4c84f22d03b4a81d1954d4c044dbc5bd4226683a0. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/FRZ052300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f97cf90aeb56bf2f4d89918267e3e9af593923e3b28830df7ac97b88f027ca. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRZ052200332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243700876bc5a141e2b5f8ebd7ba2dec97bc01bea5147888b16e4ee4c50dd6a0. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:37:31Z), 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/FRX202488001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d88eddb5952e8fbda222cfc1fa4d6ff363ae5c8f53e5cf84e1ff8d073eaef84. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USHM82453587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f684fb577ef930ae8597d88fa3f7994afe6f3594b3f96d5ebb641437e05e785. 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/FRX872515688.