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 0x34764f4854b38401909b4464c83ccf93426e0a7576f8871caa743db54bc6ad79. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/522ee062-79b8-474c-9735-3a4fb8b2e02d.json and https://artists.proofprofile.net/proofs/artist/522ee062-79b8-474c-9735-3a4fb8b2e02d.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 0x52dcd66a131fcdabab61e3ac0edeac6882282d343f8ca4a77d66b8a7da3710ba. 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/TCACW1603901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215551d31dea3483db50a3c0c7f17989f3c0acb0b858af0686a2dbe74539a041. 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/TCADY1847450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38ddf71240c0cb8677af1b00b45e80f1219cf2f4cf76c884ef679085a0b8a84. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR2X41942327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf502b40d5b48e4ad36769711065cffdb8cc524baf9d4fedd7f30a9cde49e9c8c. 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/GBSMU5174603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f64e0ddbda92a86ff16138e803bba23b9ee12fe9db3af80589bab3dd97363e7. 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/QZANL1723235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5244d6d402f7dd310851611449a904affd8be252fc105e6b2e8d40c3e2a551f9. 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/USL4Q2363224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf377b3a35f5897d201265a8dca4e83eb304aba035316e6f8a4f3a2fefbb57eb. 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/UKXN22257933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5331e007eaa0f5dca025c384f11ee162d02ab82914bb573188db0b96ad5ec5. 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/USL4R2063868.
In Search of Darkness (Original Documentary Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8ac3d0d75896ce16ca86f91a84222454f7560b36413ebd1fd199584740818b. 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/TCAEK1926304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa213a032b2b6ebc7daca191d11db6590bd9e8518dfe5f2e6e5d02d45c5799e78. 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/TCAEK1926305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bf7e07ae94151855205110aa9fabf312b082aa8d048a835438b444ec7ed6b1. 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/TCAEK1926309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad6c9f556161c57b48c6e1ec70d9a4f9e5148cbd7da09020af8c17d07f7988c. 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/TCAEK1926317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea4f52933ceeaaa6f509c75aeca695c02ce05601a3160b75de4cce2bea78822. 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/TCAEK1926319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79541663f2046e10ea59ac96b796a3837c513a023b9cceee88410cf155177345. 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/TCAEK1926328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674bfc7a693ff0c3f90f5a9a2e9b3b5d24553aabf3a046defa91ce577ce03c58. 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/TCAEK1926330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb48d311eb228b4a8d709ed9e6849f3f7bd7f8aa66df62af1b59e9ea31eb04bf. 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/QZHN91924962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cf2f3e6e1a7a9fdfe54cab1be8cff1a572b2552db7cc3849b59b3be24c7334. 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/QZHN61935833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e0f9737c845a1239133e8a0d2e5f353811448b88b8669b0a6f556f2782008e. 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/QZHN91924965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcc101eb9b1aef13b6614b4c01b71950e963eaa46e634fffa2da7b85ffefcb5. 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/QZDA82142848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54ac05ec93691a5e5954a5832daae29b3301a4c7e3ee1afafa6e93cc64e860b. 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/QMEZE1887608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafdb9490c0eeb9def6dc76a709c415ff40bc56234ba14e04d6eeba4a746ee55. 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/QZES62373275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2602a92b8f43fc9dd45561be0a06013967f30170eeb100b95dba96a88e4e195. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM2PV1847113.