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 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 0x40592ddda037bad2cb53e1382fb9c2ee9eaec9c61938527b3635767e430bdd4e. 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/2020ad7f-5102-4ce9-bd7e-67d662815594.json and https://artists.proofprofile.net/proofs/artist/2020ad7f-5102-4ce9-bd7e-67d662815594.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 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 0x7a6de2a9907d7b28f999f527abbd09a9fa33391b05c0e9bc053c1b1245a4435a. 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/QMFME2266231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3df0caa5c550004e6aff486df39fe3c339b9d6552d25e408b1db13852dc900. 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/QMFME2266629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab5254a5bc9a019dd18e4f1d86bf7028a3129b82297e57f897fbdfa4132fc13. 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/QMFME2266630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe965ba76f0259321c1a88fb7d85be5bdd664185e23c7149b3b9e741b1618b4. 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/QMFME2257345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c720cdb8fb4e8f30f1ac7ea1bde917b6cc478f3f297a2fe7de8eb945d7ca6c. 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/QMFME2266632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e18513f6d94d53e79b5e8b84fcab95f0139777701e2679967aa9a239193e84. 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/QMFMF2215353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ae5990e5ca0492d3043d5e2994783de49f30828fe930553865ca4db0d0f2b6. 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/QMFME2266634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc850f4e8dc2aa57d5cd81738409768bb208d391daba266ba3f1c1ae10013d49c. 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/QMFME2266635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071e98ab21836e5f3363cd174df0b067e3dff0cce561432191401869562c2d70. 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/QMFME2266636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71122200333d2d86bd2c08fb91af81b518b4f2a155232c3b3772670a124b381. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEZC62282448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d37bd074830cd6abbaadc4e1340bf87c2967d4ee2d7660ac43e24df8fe06cb8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2266816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0029f7c241b83dbd6c7666ba4955951581a92ccfe02c09eb2cb441a9bf540d. 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/QMFME2266639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9df64e9d2cfeeaf652ecca7ed042f46b134663d758d8a8a777ffd22a754418. 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/QMFME2266918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d6f2029591499f10a14f67ca245f4db058d4b4d3ea8477b09bae5e4e7cde70. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2460081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748a7bc7fdef22dfd6444f6d2639b3596343705dbda597f3d866cf72e0a19839. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMFMG2322362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff32bebed0305b2d84ccbb5d188f7b52999e29393c97974c9442618aa7e5d983. 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/QM4TX2460083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5cbe80da7081513f738a88074f6401a27a9c5a8e4e0f4b50bb0b07ae5acf23. 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/QM4TX2460084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36e57087803f0511f6090c7dad73b5aa36faa622ee47a514f1bff414f6dc12e. 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/QM4TX2420691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a756d5700d4c91f604943d1fa9f9e54086e66f28d866c2b535954febc368b37. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2460086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed2655910c25d14b363d84c509b23f6567e65da54b1601cc933f7424aba341c. 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/QMDA72362706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f0afa74077ab60689c3e67b459513de23aebe5babf1ca93e70a29149109823. 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/QM4TX2460088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf72dcc8ac09478ccd150bf614026a9fc6becf06653e1c4ca153566616997034. 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/QM4TW2469047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedbdd002d5898f1c7812d4d7be50f7f4f610cf8acde536b27593a40ac67dc4c. 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/QM4TX2460090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d8bac8578d8153d587e06d8b79a1292c148c96eb5b8288449c4135d8151ef4. 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/QM4TX2460091.