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 0x691236f7af6e3ae1fb7ca1e7970e3874f69beed41a303dbd1d7edcee1827f2de. 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/be23d2e4-1030-4a09-b488-3d2daf1117e8.json and https://artists.proofprofile.net/proofs/artist/be23d2e4-1030-4a09-b488-3d2daf1117e8.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 0x5909f1e46fa189ed52b085c3ca6a16e8cdad5052762edc27147d774a47f72d6c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAHW2447354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886183771b07e657472a175890422ed7279da8fb50e7c3f4d03f9f7648b1fce3. 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/QZTRX2355761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea94e8832afb53e6ab239d2161a68437f7b51193b666c362dfcfd97616fbd97. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTRX2354850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f16ae9022afcd28e5113657f6701baa891909e79d3511496445e38b8d738aba. 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/QM4TX2220537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430a8e0002fd6c84f43ec839645444b7f931b11ab0ec458e3b7dec95c24c89d5. 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/QM4TX2200529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefd37e592a9890ac1decbc077627c0ea94b251476430c089000d5d68d96541e. 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/QZMHK2278476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb96b3bf240edade9a69ea1947d80ef905d08abe30ae724198b8e2cad53abe3. 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/QZMHM2206399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d173b117d86c55f824fcf034b7b7728a4a30c42b126e11acf0f21b6fe2e944. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM42K2271434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8997199d239c9b807c7f9c6417ae5c7d6650cdef349e7c270d23cdf15fdbb4b6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM42K2243566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe800a302b80d104770ad67b1a109246071b3deddc33b624a6d58bf288388d51. 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/QM42K2292607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bcb5512d8e6332cea244cae479fb6f4fd443cc0cb00d011a1146d5ada1b7d3. 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/QM42K2267182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2035a850c3c598cf63d60a2587a7146f9a0b9eab3919177f946e0fdd19024b3c. 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/QM42K2228762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b07fe0ee467bbf359601a5fc8c13be0107f2b1d2ec77f957dc356f74fb1c71. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZKDK2248299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859383d78dc244542ecfafeaf69a2f1c6e4fbbdbceccec5afdcffd1e110c9a49. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZKDK2218519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411e186b740699644e9e75364c4a8db2c627dda671b3e8156ac6fefc4920ab24. 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/QM42K2281430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742101c967d588d36e4bff67bec221278a10aec49418be487e03f2af9daf2ba9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM42K2252179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4facd74c643cfdda998d47663536fee7c3dc0808aff8ff780ce2728d92fa6e8. 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/QM42K2267584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f02e7a94e91b9864125b4c513dc75fd76c0f02679a1fb869e1d4c2c9b901207. 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/QZKDK2230373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22cb0dce60da6dd5caaa1bc4dd1a7e6aaa0adace4afabb17665c0215376b352. 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/QM42K2261193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a55c43b90bfa50303f6808f2e0cf23eb924e869893023c9b0dbf0f351f71de. 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/QZS652143024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449f4455339a880154fba75080dc71baba9b78fd69bff58eb6279bd1b7e12955. 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/QZS632151724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba54fe3af9c2541a6e8021d3ff521e4df71a519e8e7338ffa9772923778e33c. 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/QZS632122217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e5fb2e88b55c0cde4c9494ad33b1f71af93f21d0fea0b1419beec8c34152da. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS672276645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cc10dd4006564d7dbbd0b095359a52980dbb77fc3ebcce28dd198a72e1e561. 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/QZMHN2263263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a32f9a6af25510cb729d2b597cefee7167b51b24ab86b4e8db99844453f1a3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMHM2263826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1873d2e8f01c6c8a821934abdc2b19a2a83bd6e138b305ed1350e5f81d051f. 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/QZS672257313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0700a5f20ac9954da1744651cbc097222e26e10e9971e7e86ca7ae1caad50b65. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS662219430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb2a8b2042071d1128c480b686cc2429783c942fad775e50dc0ebe735169fa6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMHN2258186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1f95a45080f3a18516769ef86e35a1b6b730951b824f77bdb45e20a22ca49f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZS642233770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7512d6c66b03bf0251edffffa50d5a09c46241d2f3117c38577f1d1b681844. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZS642258152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d53d077ed6788f4a11137424bb40ead662d8fe4661bdcfa73fa31e41826d00c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZS632203202.
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 0xa84ec84525c5613aa0441f15557f527bd706869364c4968f7c46fc242d4555ac. 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/QZS632277750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07220a6609636ac62491977b26b08521ae26ad8b3cbcf26c091fa2aeffb039d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMHL2225729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888b101497de20a17c6bdce9927c26528f9242670ffd5d82c6c7b20e90f21ea6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMHM2256072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f24d00bb360924f76617a4b00b5bc420e05838c00f1c3fbe5fafe7a5949dc24. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMHK2218622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0f5a0e26628503b54fb466ea69f81d0c6fd225ccd1c23e3a26204125d67073. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZMHK2250187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263d0677085fdb56d676174e70c6fe68ae5f703638f1d90284183d281b37f236. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZS652296023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf54924f8b6da3ac640ab8c0061547f0c0ea494991d260a7b537da6b53ff821. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZS632282795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8660c4dcd5f193b83f04b85b11ce90cb2e27e85eba6e15c2e1771059563c2b1c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWDE2396446.