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 0x8781009ac013e273f25dacc394e6a93f231afed2ced2e9cb3f3c6ff49addd658. 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/d764274b-6a61-454f-82ed-cbc2b10b21a8.json and https://artists.proofprofile.net/proofs/artist/d764274b-6a61-454f-82ed-cbc2b10b21a8.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 0x6b1fcce7d266012b39cdda37aa2a2cffe9fc96c38b8345fb6665824a11606a57. 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/QZHN91977963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc368c39e5eba337975df4c5f0fad498f2473950ea9283d88bdd89043f9872e24. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN91977968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c03fdd380bd5db7bf93431aa0e102961057c5afb92fe0a1725a7e4c4367eae5. 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/QZHN91977969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4ee9a2d8ce40f6633965725e3c1d613fc082f4a2c8ca8c7fc8e7f1e7faa436. 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/QZHN91977971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378c6427b367f9bb509a2f68dd17abc84a14f8ca736bf4d2c1ab28f6877066e1. 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/QZHN91977973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1426d8dcf6213b3b14302addf1bf81647a19c940fd34f76d92148c16edaae71. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZHN91977974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5aed0fde95b2d5661dba5c480db95ab6c378a94d2b6e257cb1d14829db02b2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN91977976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff3a01aae13f21908389d08e7dd8e4e1094a30b92c0ac5ca29a05089c3ed621. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZHN91977967.
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 0xfca1ab55680c281a5d8f34b7ddd155719d5c5ee9c617daf792b8f54bffad0908. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZHN91977964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f9e656087b13e167677cd5254857ef7ac5c88f64718553079e9540dab960e4. 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/QZHN91977965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8278015c7e3bc0748a1c14ceb5887b73e81d5c675fa75f7fef94391ae07582. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZHN91977966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4664e5215bb321c3884ab4462af17ba6e1137ccb149b6a364cfe46985a3c8127. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZHN91977970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891af95cb32165529c88271c82c74528c8a4c39e333944c76b8fda300e737e2e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZHN91977972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4855ccdb46d906184fe4b65b90a3a7987efdc69633d58ae9a80ae2df475e4221. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZHN91977975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21e01061f1edd2032d4592eb0fb999180c4dde72e5dfc59324e158e812bc57. 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/USUYG1503883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bf059289f2b7cd8d402189da1a8f859dbe2f4ed8cf6f3e4b02fda848de70c5. 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/USUYG1484076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f5aa0999f080b9c31aee6c5bb88843dabf7ee91ca8ea7bc2bb639269265a38. 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/SE62M2239070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7315e660ddba0f0eeeefdb7f96366e05caace018a597a6c3861a7fa66f824c6. 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/USUYG1441889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e94a37d8cdfc1ceab4300d49ba7c04f2dd72d11d3b116b8ef198032d47db987. 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/USUYG1364210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e801521652b23dd43e85f27ec9cfc11d44744c66a25353850f17af4c40ec2e. 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/QZES81888992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aedc36b24db2dc1b1a145a66ed850147d08b418e6534d753432a1597539d8bb. 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/DEY472378750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e67ae6067cbb5a12e4e6212ef9cd0c2b83975c816b5b741e11f67a5fd4187d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6K2394326.