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 0x04b9d5ffe385c0ebf7159f6811dab16ab5918fab60519dbaedfe6af408231d53. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97c94fa7-c13a-4e6c-99d7-f2e9d6f6abb0.json and https://artists.proofprofile.net/proofs/artist/97c94fa7-c13a-4e6c-99d7-f2e9d6f6abb0.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 0x325b8d728e9bfd2afcf3b6be22b4b3928d5d43b0a4966122af26208286524b56. 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/QZFYW2080432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb57b420edb569a4bae06431d729ecf0f89605665b0f57046b1cfbde57244fc. 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/QZFYW2080433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86826f8b537644d1c5c8cb00d595a1a91af6934cd2c3b388d5fe4f62d45fdf7e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFYW2080434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531fb0a75e4256584bd721d7bd8a8833583ed37e443096813c7223861556692e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZFYW2080437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1afbedcad1c9c2013c5b49b2eb16c67a3e50cf4175296bd253f6e3c0386c8fa. 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/QZFYW2080438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4578049fe90560e49fc1c8727d4942925a989f53857a0f8d1e276a005a66571b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZFYW2080435.
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 0xf48ae309af0e8eafa515bd6a67e6ad6ce0d3f19b139372f683bbf7586987f7b5. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZFYW2080439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2b92a34d2086436e343836c9d096ed1e0765029ae3600e6ed0f3b5df7f8c95. 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/QZTB62457099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66073b2de8d98c1b90b65283ffe5b92642843c8a0eb557e2bc57908402d62b46. 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/QZWDW2427833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400413f3f95a9002a5a8b6f75024fe67b61e4273d95c56515116fc73cce7a96d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6J2462347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e6da2b60a1c10a92cc9eff7a4a2a641bba689ad06864177dc9aa79c7d4eb64. 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/QZTB22378209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868b4eee16284c3d8403983d24336b2bc44e83436d5b066096c825af51bbe31a. 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/QZMEM2347666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde650e2d56ed1f7dc4660c351a855e3be227e79f77f1ff00037779a73fc718d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHNC2371258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351b21d9be6216ff4b032301a2740a189feb1a5cbfe44418daf360d27fe2ea7c. 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/QZDA52370569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bcade83089acf2f771c2de4dfeb566467fc6affe5fc2e5b7e7b32bbbabe55d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB22291582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d41e3376f7670d54ee9d12cbfcf926b073485770b383e5f42fe0b52a7b7dad. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPLS2268580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab45e8af518fc9f739fe7b753a5e04a17b2617449d15ce3bf779b48e4dc2b23. 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/QZNWU2254814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c383b023a89c3d9bc893175942071e85151116d893e75bc12d3b917471fc23. 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/QZES72232856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171c61b7cca7796506bf79ee60f0cef26cff189b5853612c9642382ae1a7059b. 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/QZNWQ2184773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5613b3ddef551c4029debeb1484895efdf4b25c6688b29515097c1422938bf8a. 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/QZNWQ2183396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d15a1b993f1855dd6ea90566a4950f871e08b8ff9f00d50c7f48730ea0d7e4a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWY2071259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b1400c96d925c3ce86fe3b57352e1763abd12be7727c7cda7f6a80e2b3e3de. 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/QZK6J2085288.