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 0x72493053879086435155dd2a30d13fe43678241d1adb12671614ac50d0c2ee38. 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/047a54a9-7d15-4d25-b41d-563503a14da8.json and https://artists.proofprofile.net/proofs/artist/047a54a9-7d15-4d25-b41d-563503a14da8.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 0x301dfe0974ab4e0b1101ed9e7f441065f12b9688b0de6302cd6ffb7479af1687. 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/FR72X0500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b19b915546f11ca9ac2dae9050f4a14cc2e3b39574abbfbc35f0e06de96f69. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR72X0500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869e4d09357b8cdf783b9e045015dade67996da633b7387f8d199756f024a6d6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:42Z), 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/FR72X0801150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff07e7dc3f9423b0a51fb5944cb798c640372cb2c3aa14bbcad51bf74b73d095. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR72X0801153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cecaab34ea4315ac4d8a2bb396b5c19b035609fe129871b4cf0e8843f83163. 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/FR72X0801155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcd3c5aad6d4fd6f6a320d25f0cd921c7d10a00ea7c844a85e2b73aceea26c3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:19:07Z), 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/FR72X0801151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbffc4ed8cf0e6fa945ff2afa44049c054e75c5286f5ad8ac54e4b39d72c9d5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR72X1100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaff8278c034148b3bc8ef7fcaade038fb151b438599d835da83103b11e1a748. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR9W11304413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fbd5766d3fbb1891b6b96565ed854f1405c51f63d3a141957801c44064995e. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/FRXZI1500670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d0d8efe3b4c44a85f00c549deca1d3501c38c01de6af4b5d9de58b6b4343ad. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRPJ31704420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa5a94da220821bc2888dab7d906c05a3dad9af4aff54625e3594d7950d24af. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRXZI2001240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0cacb1e38da790e595debba1865f25f8d09dcde94bd95e94375c457a810aa9. 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/FR72X0500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dff65f70ebedf4e43b1064840d711cc2cd23bf8d409c3b3ed42fb9f56becd9b. 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/USCGH0806780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4ec3838b82a74cfce0a9701573f96ed05504b683c4fb4941a27b081fcef6fe. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR6V82402627.
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 0x4eae53eb18b300c436d306c7ed8299ad59bfe5b02bfdcfc0e4653d8093264a9f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBGQH1310468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23d84178abe7b8791a81d3f3e0b8462a7f1d885e52c9765f404b125203b7ccd. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR6V80871984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5efb6f08b50db1081acc99fa2c6b830944070e23cd0667dc0d39993044b70b1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR6V81738411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3f0351483a2eed7af484d4bf9f8bedf3d92c4cf42d870595d05bba019094ba. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR82S1500018.