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 0xaa2e5ba1798fefa7d4f6f048dc30d83d86b45b0e40824534a0e5d269ea424a64. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bc83e47-72b9-418c-82d0-c0a5eb28f4c0.json and https://artists.proofprofile.net/proofs/artist/0bc83e47-72b9-418c-82d0-c0a5eb28f4c0.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 0xacf599faab0e6fe6fae5c3b3fd3f310c63b2dfe0edc897b90cd4ba6cc0da03f5. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FIWMA0500536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a966e6f2f8e1edc6fd17319bf9e5bed3b47d93a5be59f852462469ae3bab24. 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/FIWMA0500537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59978b5c4eddecfb0edccf4e3ca2a85b13383216c77da711957c6b92c3ec8ba7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FIWMA0500538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f8aed1016c215d4b87a7e6824e67f06bfbed4ea48a1d74e2de002505e5ce77. 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/FIWMA0500539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32a26750c23c2f2077c4662a5593ca070bc398edc2c3b24a6703c1ef4cb6b50. 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/FIWMA0500544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a3a39b221e785087a422c1affaf770688a3bea47c943c785948004919e0b1a. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FIWMA0500545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bd72da55b96cbbaf5da3db8101ccbd95abf45e60ff87fe252b8dfb17aa28be. 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/FIWMA0500546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd062ff4b2a67f7cd491100b2a5c334173e990d3a2d93f89257943209e8a435c7. 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/FIWMA0500547.
Juna-Medley (Juna kulkee / Onnenlantti / Moskova)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fee818935027fec6db57e942f9b55c4e02ba945db63d4c4797a7286c6d0830. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FIERF0800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa303cc6543a2850f2a9d1fed51ca50462d45556880adffc3887f821f5d719534. 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/FIERF0800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d5111ec6a0f6d95b3ee0881426fed25c057dbb63785954e3bec4f7e3efe8ca. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FIERF0800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b114206962ef0893a27f14e5d2cb86878ef4abdfea9ef2c1cda40b31d8c67b5. 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/FIERF0800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6f23519f9ab88349a03bd72e93496edc16f2e544c3ad427c45850a1c35bd6c. 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/FIERF0800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dd6288834349a76476f8424789eb94baaf5a64ec02bdfa4c2dc09ae815a506. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FIERF0800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c1231d0fecfa698728ed50e555e53c8618ab743407da66c21325d25c7c2b54. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FIERF0800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a4b0dce7276958b813f709de79e4674bc59ebdff49f29fbf61a9d60f62a37c. 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/FIERF0800048.