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 0x3744eead6b99f92a2417356cdb873070a4fea9f062ce566d835c2e46781ccf77. 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/58129571-0215-4348-baf3-9b7616cec4fc.json and https://artists.proofprofile.net/proofs/artist/58129571-0215-4348-baf3-9b7616cec4fc.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 0xe4dce0082cd8ef64c8c935046b597374fecb1c48aee1e32ee2db8895c1e03afc. 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/BXEKO2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ef9cf95bf07cde095676df034af8c613757b09af25bc722997648f2fbb21d7. 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/BXEKO2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb6e2e832789809159feee49686230c7b9fc25179fcf96d2090779bc562214. 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/BXEKO2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efcecb3d1937bcbff7aacf84ed0bd9cb09600642b7f5b3cb2be101ada33fce3. 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/BXEKO2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea72d719489c5f512a159965cefdd0478d6d554fe631cd2be47d7f392da0780. 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/BXEKO2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55292a3ef64fa0c81cd5e63e18930897b0db55fc8b04f41caed5f401b8a14ae. 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/BXEKO2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf0a99cab176628cda39da1fec09d4a859806ebe3069378c098813e8a48ca72. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BXEKO2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe62ffd844a075bcf0dcc56d7cce58ff91be3311ae44fa52a3d8024f96d41af. 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/BXEKO2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772ab7212b422cc2829867d6d2983151f7b6bb00677f0d07c9b431e063efd799. 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/BXEKO2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3739a2c4ca83c6b2344d336ab47333b97ffa370505e40849c28c0c1a1e8d3b19. 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/QZHZ32144814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e853ae9fd9e9254b9c1173a42e0b5ae42dd362cbba0534716d85d474b86bf38. 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/BXEKO1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833269c469313573278a6ecc5b057a3b961a8586cc62538b32dba5fc8ebc9989. 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/BXEKO1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8883cb2fa4b6cadd905511d699706cf3ae7aa93c042492e19fbde33e89a141. 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/BXEKO1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f0e2f60e57fe7cf5ffa10da15734490de3849cbf12b95c2fdcef53a36c9060. 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/BXEKO2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04129254523214683188b698c8e325bcbb2c4f4f5760ef7893d19fdd5f39e7a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXEKO2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a62b3ff1f1089cec0adee058caff98eae0914b3b8a1672bf2ee7632cfdf4a2d. 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/BR36H2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7e804b64b8e12534e1f0447af6e5053a520b0e987874b666ddc74facbdefb4. 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/BXEKO2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e607e5b82b866637c265ba56174d0a010732f485fc5786c8fcf5b2cbc0caef. 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/BXEKO2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bf1752792d69bf98bb7ef16f8a61df6bf9f120951d5c255d82336af49ddb2d. 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/BXEKO2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ef6f289f2571b9d6139e7326ff6b0c2baa0d7911c11680ceaf7b7f60d026bb. 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/BXEKO1800001.
Infinite Acoustic: Singer-Songwriters, Vol. 10