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 0xa17c26c5a13dfbf773049372bcdc0df5cdf473328d6e53afeb5a4ac82e888082. 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/3c1a6e59-e016-411a-9831-902bb20f80d4.json and https://artists.proofprofile.net/proofs/artist/3c1a6e59-e016-411a-9831-902bb20f80d4.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 0x244878ebd6054b9238650d6540af12848809608859c804a3b5673f10a321def8. 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/ESUM72301736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606debcea9d05b2343d5eece7ad0a9104db416582cd8a77be9319be8e6d6a577. 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/TCAID2408395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba296669e9f4d0d642bfc5886b2b5b4f9a2442754b4d2a357e63752f7fd17fc0. 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/ESUM72300616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1870ff0fe60c48eaf21fcc0961cdb778ae6aa9674d776d42f913857299d1ea0f. 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/ESUM72302118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e695c50f944e1df7ea70d417b2197396c8161314e6029df2691537cc49cd9b3. 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/BK4DA2456825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42716cd88d7e96bdf41099fdd5d4d6f79bd15afeb223e8f97993637237f1e5c5. 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/BK4DA2415272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccea438113be5fc6fb7212d51f3c22d1501dd276062f6f68008c7285c698ee17. 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/DGA0H2489879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd377df7b100b4d165c30bac364e1fc56567bc8b503f5d4d3200d4e99dd2efb91. 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/USA2P2517644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a50ef356c4fae35660d60334d63fc2de1b223bfb2bfa06c188a5257e4c58586. 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/FR2X42530321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42dcf1672478fb1668c0beb0c3de4fc68dd31f19ebb262a2b2a21bcb359e626. 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/QM4TW2532825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef790d393f005748a4589f933c1f684141709b1e63270d8d24c297e25d2f211d. 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/ES75E2411877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab961c079416a1b79581e39635eef9596c556dea8a1afada0c08387d20a814f. 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/DGA062489419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa87804fde2f3e3cf89ac4a937fe4345d0e86eeec20cf5d7f18c527375f282d. 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/MXD782401166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5588e8bca6b9b3dc096a724a52de220f6c7f5cbe11276ff0d07fad6406e3d24. 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/ESUM72400041.
Juntos (Original Motion Picture Soundtrack Dolor Impune)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fcc3be51362f8cf5ca0390eec6aa5eda04b23ba2e9193f601a227441e75666. 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/GBLPF6719627.