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 0xc5e526019ed86ec20f3ad63d11809d6a05bd613eedcbfbd8fbc080509a745c85. 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/5bb7f982-6f3b-4bc8-bd09-839de51fefe6.json and https://artists.proofprofile.net/proofs/artist/5bb7f982-6f3b-4bc8-bd09-839de51fefe6.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 0x8bcc78d468458a191463b82704ad88cc8dab18b76822a3fba9e4325ed5ae501a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f3e84a05c7a66bfce619065b6b0c5144958a5c21c7fa31283263f14051d154. 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/DECE72400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5155324b3ae233c6785177abca0cc949f808ff8e3299e7a626cb61f9c7b443b7. 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/DECE72400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d0ac415ae96b6c0f344077c0867e1ca41f4288d2c60d33cdd6b90f6315e934. 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/DECE72400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc031e5f349edb504e1354bb897b81ac621140bd2a1ee0e0adfcbdf1aaf3352b7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72401896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7d1ddff63a206f9eac405a9c9c0fb83beee95859f65ff45b949c6ccced3041. 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/DECE72401522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a159e386a9a7abc214b57753df4cc3246e1dca78ccb1c8cda976b13621b596. 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/DECE72401283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0060e9c5bedab2732de80eaceee850f6fd4e7c9eba65fe96450d022c6f654c. 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/DECE72400959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563e3260fc608f50ed47a3372dd1b62dc83a26afef5c4b9f32e9f5ff9d9a300c. 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/DECE72400800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc8ed382ef44c8d046c4c8f76c0fe8b15a67d22461864b817699f69b0b647b2. 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/DECE72400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde26ce5b64f579af0fe8d4257ce72011e00625dfd449aafdc7a5f453472b3bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812369059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9c1f43ef82944cce410f2b39ef29645cccf8360cb1c1557f0144e0528ea3fd. 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/CH7812350539.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2314aec21edcb867ce3a2c4703c72a2afbf24d3b554810660b4fea4211ff2084. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812365440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcc78d468458a191463b82704ad88cc8dab18b76822a3fba9e4325ed5ae501a. 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/DECE72400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcc78d468458a191463b82704ad88cc8dab18b76822a3fba9e4325ed5ae501a. 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/DECE72400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcc78d468458a191463b82704ad88cc8dab18b76822a3fba9e4325ed5ae501a. 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/DECE72400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a159e386a9a7abc214b57753df4cc3246e1dca78ccb1c8cda976b13621b596. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72401283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7d1ddff63a206f9eac405a9c9c0fb83beee95859f65ff45b949c6ccced3041. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72401522.