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 0x1d188a149dc20b2ff1c4201e842281cb2c43d555727561417f7475afefe8569c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c20595ce-280f-4b5f-8c8c-14c28c1d6a9d.json and https://artists.proofprofile.net/proofs/artist/c20595ce-280f-4b5f-8c8c-14c28c1d6a9d.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 0xc712bbf7755ae26f6c0b2c24f314211d66fc64f3edbbe6ab9baa961da3099171. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:18Z), 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/FR9W11502771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0468b24bfc3c266015cc98c0f81b76a94a7cf5ed0767266b47aba853e848d241. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR96X1725292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bef4c08240fc4bf221f5a97f90041b2026090d3dc1f572a712ceedb9b5f967. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR0Z41900540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a97f1732fc8796c075927198611540d32f85bb6efc4920370d4ff3f556920a2. 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/FR0Z42100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528157c0c6909472e2767c01c0a6451352d1f08969f481f46f1e0bc8232c9b6d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FR0Z42100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b2562d4ec7836c77af1fb194cba0139aae172a6a3da69492dbe9d119c3ad09. 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/FR0Z42100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf804530a4ec11fb4596b6e46c459588014d856101b80c084e9f1ed75867769a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:31:38Z), 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/FR0Z42100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622d25013cc0a62f3ac69b6fbd3424dd739f139478a42c75760b7e135895b3e9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:09:32Z), 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/FR0Z42100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffd2e3c9314d548c1e22efa03fb48c474d6d9ed6810bd2709363af7e47037d7. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/FR0Z42000710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d01cae36ff7202d05e3505c87fa10ea516e5241d971dfb0859a3c5a7fee8479. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR0Z42100090.
Kerbal Filter (Homeworked) [Club Nowadays]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111ed6a426e4f2bfb47db199e8fcd1e169e4caf7b6914606553e4d4dc7d85648. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR0Z42101400.
Kerbal Filter (Homeworked) - Club Nowadays, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdc06ae5a2908e5572729ad1e31fed3f40ea220f8fae8a2e3c9dc2c8769df8e. 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/FR0Z42101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3655693fcfbb37cbd68fd8dccb23098b9edbe77185aba9e1b5da0a7de4bde64. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR0Z42101410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f50c6aeaf1e4d7c8058dfb182e16345b70452ec8e5d7a0fc4390ef04e30fc44. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR0Z42400320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f626ae18b74659fc6391cfb7455953da2f228c17e9f170aad52fcc356546a5d. 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/FR0Z42000803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f626ae18b74659fc6391cfb7455953da2f228c17e9f170aad52fcc356546a5d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR0Z42000803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0f1853403321dd5536c8faed8baaa34fe26630e98158a659a454928a819c83. 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/QZ5FN2113339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73982b20407301911be2785430bb8345d336b0174a8a8f7ab77e506a59c89da. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FR9W11502773.
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