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 0xf93c65d12034526896bedd182e3f7bade896f8b593d678fcc54c75db8e6775b5. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d830c002-d920-4e9b-bbc6-e5619e8445e8.json and https://artists.proofprofile.net/proofs/artist/d830c002-d920-4e9b-bbc6-e5619e8445e8.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 0x62fc28dd0071ec9127ad8b7b9578bf087f8bb6b6d90313cb8536b7f9f8d27d65. 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/QT6EB2556321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd88118d4f76289afb06d1974feefa22009d3fa41558c6da77f001fc76f3c796. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT6EB2556177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab163ab8a34f57e2efcaa96ac0c2dcec53ad8e29a45ac660ad1459c3882b928a. 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/QT6EB2556225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6945eb80c899bc2c1e7de912bbb21c6aff202dfa204bcfb6fd27d09a42f9ee. 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/QT6ED2594700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3d1b4f6c2f91813c33796f555700a7df2190251ef1857db35a5d2f381f5bc7. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QT6ED2594653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc05f070dd26c5d8f99a247f2a59cb63ba3ee8c4da2b3df2fe4b36ce1099098. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QT6ED2594629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a420275acdbfc702cf174b0afd7e949192e3900a2bbfab0f6d16ae04d94a4ff. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QT6ED2594558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09da23fb019341e040dee1283be753a3a825ef7f96076312f3fc0da39516bd78. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QT6ED2594465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875c59f3a487b1513afa496acd3c7a41859ac0087bca5197b25474b1b496c614. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QT6ED2594195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d2647bb072d46ea7231c45e0d0746df71fcab8f5bd250e698da8bad485adba. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QT6EE2502672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb744e740eda38a7f2cb7706e7fe449c408d8b55f049841fd7e099731fedefe05. 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/QT6ED2594704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d5696f06714c5b16b6673b2f74da5f545bb2c66e2c2cd364018b520adc63a6. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QT6ED2598490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ff1b0ceba31dccafa3d20d338e730e3ddcb51e0f2adcc54fc39f9e152b4d25. 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/QT6EG2569908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee3288377a239b5a64e1c9d1a1e84e304b76bd6c4148a040cd89b1d6334777c. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QT6EG2575960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e604bea3b7c41c39236bc738ec1a31fc92ca313691ae6c7cb2b6d8d0324a7db. 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/QT6EG2575959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b909fc7251b414f5921961d2bd7f04655be6095e95a9bc7c975eeddc914b424. 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/QT6EG2572742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae596090e4b48edefe23e5e8fa1b5c7874d624717caaa087151e2d7c691cb33. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QT6EG2572743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94a60cb8fcbe19636afefbacd75deaff2e0dfbac9ab042e6f15da9f74089990. 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/QT6EG2575936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100afd29f29a6653ea4c2e01d1313706d079712d61cec4dd8c2013db8d403138. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QT6EG2572741.