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 0x6ce4aba0a282b93096b9884b19eca2767f21f57f0735fda05c3cf6c7210a6fa7. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0cd1851-acb7-47b5-b944-cc18d56b37a6.json and https://artists.proofprofile.net/proofs/artist/a0cd1851-acb7-47b5-b944-cc18d56b37a6.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 0xcca27a77845966db5cfa860e5afbb4dcb3294f08c2ca9740f3547610892a1c86. 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/QM24S2003352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdc6f6c7952480abfb54150261168c16169328d1c566fb07c539ebf0c92997e. 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/QM24S2003353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c37a9f36ca17fd00ccdcd5c035197e9defc279ea37c1e84b320faed9bfe483. 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/QM24S2003354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0566f227ed8ec41e78b767f3333cd630d7de29b2bcdfdd672ca59fbbc4e30ae. 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/QM24S2003359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf16078bd69072ebc5ee2da5e0b1e8cc90442d4035fbd5734f762343f9d87c2e. 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/FRR642401434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843aa7993f6de08c419750e8ea931ea0698bc59bf5d023ba66555ab2f5cfa529. 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/FRR642401413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33b66b91c20d24b330327bb8547f90947f44bc2902ac942be2b4cbedfcec1ee. 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/FRR642401435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b34e459f3e77129bef63b0dcbbec734bfe571fbcaac567eb13a191df68820ad. 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/FRR642401437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba4a08efc54ceb482652dfb89a39bbe5f506d9154b46cf92ffc5c61ffe7ebb3. 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/FRR642401438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd382bf93c3519bdedcc5e3a52548f3f7e5ed802fa5e7f9c4204164d6b6399d9a. 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/FRR642401439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70347a42ee7bdc0d6e994de223d1448b28a5be9aa0da50e613a5bae4bf4b7d4e. 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/FRR642401441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f25e56439af306838d236ef4a697cd02550a8487b5ae2c72fff166218f53582. 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/QZPLS2310217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2a62498d179b40de2bc36893c259c74d14d996b031e35c2ba789d514560b0e. 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/QZPLS2317721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3062f44a962d611b821e2a7dd1ef0bc3a84c03b8d4a0bc91f4dbaceefd78d17. 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/QZPLS2317722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf9dd2697b7645ef34b360c313b97b2f2eae40c6ba32671493c15d0b2b53adb. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:38:31Z), 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/QZPLS2317724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d292f0503cb4c4896c76380eb873b5c12ec3e80816afb1f08a35c90fdf0fa3. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:09:35Z), 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/QZPLS2317725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b09487f0e99286d51388d919ee86c8dfc90dbdae45a3defd75950239cc78aee. 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/QZPLS2317727.