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 0xb8cbcf5c18b242e22a5ac683994787483660aceab38f6f10fa262ed98e03deef. 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/5e681d22-3bb7-4b7f-9486-ee0d05146ba8.json and https://artists.proofprofile.net/proofs/artist/5e681d22-3bb7-4b7f-9486-ee0d05146ba8.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 0xe355f352a9e2fda5d0f1213ad5d1b07538e5632b65945f516822247907301730. 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/BX95V2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf970c7ef3a4ed5cc60a456080f080ebe00a9186ca229a86f6f943fd86a41ae79. 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/BRCQE2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f71e5ae9adb35ad659361e0808720147fb824474bc847a4e8188f34ec63f155. 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/BX95V2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157ffaf691d1d0a24ab1be35159024b65d15cc6472a6a8ce24efbcf1a25e984d. 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/BX95V2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed2341edad90f5a04407d8510819a9f37c5debc2a0ab1f8bd3c200de25fabe3. 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/BX95V2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38966074e097d69cd9ef3305e0ed3599778c7268ca9dfa1519ec129dd4a43a97. 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/BX95V2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf324e2f8640783a44f8f3fa727520f0836322213c273ce74c95173d956bd8afa. 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/BX95V2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57095b290e48e3f451b57d101c65891ad2e5eec0a7c80df83c90819fa31662e9. 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/BX95V2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167f8ac6b9170d7a88b389223538afc4e1f7c760f6930bbeda0d41a11ddc815c. 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/QZGLM2378592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504fe5dc2387c2c3ca259aace390dccb09ab327fe56d6cb3bf63a2ce291e61d1. 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/US7VG1675675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7ef7f3321bf7bcbdcf286c9ebdb724ac73170f28d0de809515c9fc454b6ff9. 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/QM6MZ2442555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1e2f6d510ecd0a8225223f9d2e2f5c736efbfc9e87a2c11a55b829fde44611. 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/BX95V2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6314866e2eed52dff1beaf49389fe1b8072155d01fd142fc737a0ecc8db08076. 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/BX95V2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98e87fb4588859b99811e7fad58a210166739ec928729963c8835ff9077c6fe. 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/QZNJW2097511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422e64e403ce5692d6b9231960ca4a2c752e018551ae6162bf69fb0b0c7e2f7e. 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/QZNJV2065488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87eac26f3eff8008bde17185116d132e1d8fb9bf7d0a3a5c50c4334f7a4e710. 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/QZHZ52000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4253aeae2db0ed084c8618cd723cf2aea0e1e36e7a697bfaae77b88e3580921. 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/BCMUI2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817bcaf7f2547eac37494aabbfac920b738d3f1d288cd618c218d98deaefffe6. 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/BX9EO2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e02aac46ea52763d1632b0f28934eada04f1b59643a6787561a5ab27b7b880. 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/BXZSC2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0332b2dd98d42abad017c8032face8da69a34fc34d43622ca94f5e8c3084e8df. 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/BXSSW2300346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb894603e322f0fccc58f949bfc8d736f92ec68c71512da5faf0b0706f95e0a54. 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/QZNJV2121565.