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 0x63709c78b3814dedee7dff237a15ec170ac7dc37568dd2f6bd75a2f795ffe313. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d937936a-c396-41c3-bec9-e5f575a78074.json and https://artists.proofprofile.net/proofs/artist/d937936a-c396-41c3-bec9-e5f575a78074.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 0x962d1f85d11b0a3da3edcbf2453bb90224fca0430dc926b8464cfaa91856e16c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZFZ61915009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a15ee6f9147f14179c7bcdea95eb63b5685f8e101f2f4e603d40760366d91ee. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZFZ61915010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe970e01f36387c12b957f83a7e0920d0756a97099177e3e6cc253e4f7b15e799. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFZ61915012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf379b843ef590f58fbdb710ea066315bdfba6ecb1608a9fdf4ebb5c4985b3d4c. 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/QZFZ61939029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086eb165e455de7811f1f1b380e43de28c564947db67852b7a3c75d69d41bf6e. 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/QZHN82058872.
The Hissing Walls (Original Sound Track)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0100eaea39c7d71ba0854fd2b13a04c9fa0d4859f493e6b1842a22990574f87. 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/QM7282322126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217ce6a4fa9b9e75f8dcf9ab412e9814f558eb5f73d1a095164fb596e236a6b0. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/ES31E2506607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaa603a699f176b53d74d7c679b7ee5add0c968d8fb0db050141292e62603c4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES31E2516740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35479414d96096b8cd85bfead24ba3844e3bf179eea51b11a0469eabc3b9aa97. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES31E2516742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f32aef86be485b36749dc98471afeb2b694da58d670d372a6ada45ddab893b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ESA012108248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3948d6e56df1febea864bf906cd014aea6a61f2372be5fd25a3fac5802fd9850. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZNJX2363944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccfe0353274faaa47ebbc0ec075988966c990098679da07ed9ec42d7bce6a18. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN71952173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b88860bc072085e4585ed62f34a164ccb82990804421cc6e5c4c43eafeb6c2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZN882185596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb0cf90747887c105aba29e71ae806e40a5a90dbadb5dc571c414f8df4153b6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZ5AB2323249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab19faa8968dfc8e7c7665aaab33650c63fd39aace25172985d88e975c37bd5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USA2P2405890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a796584ac2e644f40421934bc45dbc29a013c8e5f41f54fb32c1fcb00a0d65. 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/ESA092332440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5e07e41b6bcf859edb29c42ad50a08c886676737a2b327788904d03a0d79e8. 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/QZNWV2070232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31882ae4aa09be86a6b9e8025030b6cd6e373cc8f2aef8ffb39592c2d7801b0b. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QM7282085017.