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 0xdc84b3302efdddedddb93aa75d2bdd3461051db9707c3674a03e57c4bee80c90. 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/6cc3922b-9678-4783-b147-eae62e53244f.json and https://artists.proofprofile.net/proofs/artist/6cc3922b-9678-4783-b147-eae62e53244f.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 0x542a2e05bd211b3de3cefe3ddf59dbcb01244e7dedd680db0e627673e001c46a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:59Z), 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/QM24S2105523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f20373b7251ba438fe6073b546c0447241817dc4440f1a78946e44515b5a890. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:21:50Z), 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/US3DF2203951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ea6ede5a2e3eb3cd98724bd8504e66d93e03472390c66ba1a2a3c528ac2809. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USANG2273156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ea6ede5a2e3eb3cd98724bd8504e66d93e03472390c66ba1a2a3c528ac2809. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:19Z), 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/USANG2273156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bc1754acee6f34904330fde125146ee36adcebe53633b2efccb218032778b3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:19Z), 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/QMANG2204958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766f737fa8ca0e37568c7204545902d78db28878e4d6018b68a2cfd61fdf4e54. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:11:25Z), 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/QMANG2204960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27ef5c3358fa162ea695e2452698ca59b8a2144df660a1251e069102ecb0596. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US3DF2424962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb74e03487c37d188ace53e2d50e39f8614f8676eda65fe622259fec988c7fa3. 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/US3DF2440673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa905b0d695159b01f52ebca90f022f064787e524374022292c0385db0885e4b3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USANG2410628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbaf2db334f6d866493a2703fae1227eb9fc283adc6a40d61a1ab7adb09eef5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:59:58Z), 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/UKZGC2408131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34878aa63ae4b1e3c01f32a71e3bf9a9fefb8a05936974931f410a8ac2682c8e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USANG2427024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34878aa63ae4b1e3c01f32a71e3bf9a9fefb8a05936974931f410a8ac2682c8e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USANG2427024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0149ab390cbe556f1b1dbb9f1d3004e30bc7daa680445af507283807ddc53e6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USANG2497324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3eac9bd1aeac70bdac7974074bc84572e117a795b56f3e9d3e98b036b447d3e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USANG2480962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdb61eaabb4bb2430c05b38a1c285391df2d4044a9af340c990278aeca199c3. 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/GXF972476134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc4bf4c58bf872dd6667728e44168cce21d0bee92fa48b064eb97e8755353ac. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US3DF2500553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392f11b649a5a0fd16ae791a1cc47ce81536f55ad9a56fbc8f18caae9ab0165f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USANG2521527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773c622ee5fe56c1eefd63b775fa277383cd687de8fb3469dfe8f809ce7e12e6. 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/QMANG2230148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c0c33c181557a6cee1a6355b1f587ff0e745b033a6d013796beebc729dde12. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USANG2489154.
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