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 0x4942b5eb3c0216774195dce08886f9a30188c4f4eadf791cb5bda8619905dd8e. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9172ee8-7524-413e-b367-fb3c9563234e.json and https://artists.proofprofile.net/proofs/artist/a9172ee8-7524-413e-b367-fb3c9563234e.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 0x119024563f83d77130d57addfe2063afb83249f46d7463db34b56c5de0b3ca0b. 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/US5UL0927936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfd0fb56c5930a9605891ec48c3150eaa71a22e30a5443f382403517c68d659. 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/USA371047723.
Strawberry Swing (Made Famous by Coldplay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e57a2b159d17052b4117fe393e3c78d3a2d4f5ca62bf355d9458254c701a287. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA371047731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050ad25831be48ae909ef1ba08d4fbc882e6fdd358d042dfdaf54063bfc3f5ec. 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/USA371047732.
Jump Then Fall (Made Famous by Taylor Swift)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de76ecd4717d202511c08f67ad82a35bb95ad0052acaf15971b4969c6489cac. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USA371010151.
You Belong To Me (Made Famous by Taylor Swift)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef6bbf481aa45267910b6fe5f6ca330c67a288db59311e48a86f8577dac05d5. 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/USA371010152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec86d806549688dffb78a2016d367ee90de9c8080c22bca8f540ada8a9a0377. 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/USA371010154.
You're Not Sorry (Made Famous by Taylor Swift)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbfc7c5909f93c24afbc1f1f223279f122ce19f22d84d30dd4de4cd467122c9. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USA371010155.
Love Story (Made Famous by Taylor Swift)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5048cf74a5961b7d264c0f8b86ddd3525ce158d92a2212f14ff902364b72fe5c. 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/USA371010157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd837a84b0bc7e228c9a39c2f4a807343a5a2e1caf228c342d5b739c62cad6ace. 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/USA371010160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36cdc100d1bdbef358978bfbe34ec4d2d06f08c3ff4b32b34793f05858c6a88. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USA371010162.