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 0xa54acecadd504ac0c8a7e0b9ca074510f701925edbbf230088bbbb8bc2f11ef3. 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/d014f77c-42bc-4e73-92ca-58fed123b926.json and https://artists.proofprofile.net/proofs/artist/d014f77c-42bc-4e73-92ca-58fed123b926.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 0x1c6563e311999ce471aa1a87bc0c53b45437aef9c1235078a066856e8733b893. 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/JPS801958368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b449b8b342ab0b7914e607e00109a492bcc02178de58a8e265c48ae723cb4a7. 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/JPS801958371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55489f2d29299042fa9ca3372f59ac55e2ccc101e42afd9af1a2d3fc5ac17919. 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/JPS801958375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2c90b94c6c92bd41fb37c025794e3d1958e1563c832ec00db44e094547c39e. 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/JPS801958378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b43d8fc7a2fe4c6a20e7d4edae6fc01c19cb9c70af4ce0d7a42d05e477db144. 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/JPS801958380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9788ea31deedc5ce4d2e4695b4bd399052e64a45fe0eb9d1e4c6d099a5bd341a. 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/JPS801958381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a7d11edba6df9fb10bd85ebc4815c5b497f7576f3cdc5bdbe1890fed8fbd8a. 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/JPS801958382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c6a97a9eb1ff00da0cefe0645d2a51cfda58b5fcc08fc6c4325e869d4c0d86. 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/JPS801958383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c66da2369ce803c51758afb5288747f1ab38161926d0e7cfc577001bba43f5. 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/JPS801405134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb91e8ff6778e8d8f290e384fdd9fdb314044bca67ef59b3d32502109ce8b64. 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/JPS801405135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5853c0d2d97bb3cf07c93ad311ef682f60d96b0265c126e4bc1560617f20ac83. 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/JPS801405136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78672c2fb6ee21cb5f411f6d30b5c092b96e5b11c5b77eaff6b7b011f3cf24a. 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/JPS801405138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f51932a655cd66e72b836370a45dd4cc575ffc8306430e9cc83dfb05b101a25. 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/JPS801405140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7acba5451b49f6b1ccc20dbbc411fd6ec544d48a033e7ad7da305be402a55c. 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/JPS801405141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58012e9740b3492b543c9319261899f04315088d4b8c8bb2f04db4f4e464a327. 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/JPS801405142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefa5d8e76aec9b47b07e6474c920f810096f11787cce7bcff8c027c1a271ca0. 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/JPS801405145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9c2ebddb80334bb91a3325e8e8099d5e73043466a542ca8c47ea1761f2add5. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:50:31Z), 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/USA2P2016473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0254a6c21abddec398b3aae3fef4ab131e44d5323ff3cea1a9489bbd2d1197c5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:24:11Z), 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/US2R20500684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd422f06451ad2abde96ac9cf9aead6b9e09d7691dbd7c543eb52f1df9b55fb6a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/US2R20500685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e845d31f60e1219d3800504c33d259bad7f5ec17be614dbe07f0b28b8b75ca6. 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/JPS809913368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30cb2fce5dfb6425f10f94a664ebb49050bd88429d4b8a035a7914f988ab5cf. 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/JPS809901710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5fdb52b2477efc311cfe366958fe30f4ac46b1da1893bde44a5610d8f9eb24. 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/JPS801851091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7bcfe29226a1d8c7fdc4d883ec37a0852f50bdd194827dc216a89f25a8326a. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/JPS809900005.