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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24de6bbe34529b1108124a304efd81cbbbecbb1db9cd4d770197c53a5f53acf8. 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/39cdbbe9-77cd-4a60-9587-30b738e5d834.json and https://artists.proofprofile.net/proofs/artist/39cdbbe9-77cd-4a60-9587-30b738e5d834.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109354f064999b8cca723526868641dc673e50b33bdc856927fa52b779e66f48. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOX9X3503904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d88c3f3d2f9a8c8d02d18a68bbd6277bf96f2f0c88c0e99ddaf653c09f24ce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOX9X3503906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06455d25e7cbc0d0378efd839cd2a4b01338f6444c6f2fedd6eb3fed4a370c5d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOX9X3504006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e355969b474279312f1b9c83b8e210adc76ccc239e7985128b353fbc170fc8e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOX9X3503912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01e75b2ddf321cd43b9ce3b0244ec711123290deedf422397e1e731b1fbb36b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NOX9X3503901.
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 0xa0314e94532becf658659c5d03a5123355911b1a53744c91c046b7b77fd629bd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NOX9X3503915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335dcb5cf1b1dcd1c3ee107ce538aa739cb3f347b82a12eae3b488493bf1dbc8. 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/NOHEK0201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e98e3e42f015e948f0dd958bca852a1db701264eb37656b93d575560524144. 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/NOHEK0201020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb39329f9a2066a65a8315c19a8bbba7220e5bb39718a3e9292262b70d8e476. 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/NOHEK0201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac9977b20abae2cdbb7df3b94e51d62bb1be85d71467a20bfbb0b7441eef5aa. 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/NOHEK0201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d696e211610366ac13844427da4b0b95c534810ecb7446b410d4bc84c8ba3cc. 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/NOHEK0201060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa526f1c2a2653e380c4f6dd5e14c890516340c09cce13714370ce81d3c5f5ce1. 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/NOHEK0201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03155bd0f734a79b397d04209ee0e7bad73a68f64293f927d894c85ee1e2d429. 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/NOHEK0201100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f11d86738ce0e0fccfc72a87f8cfc70d8ba24887759f46663df5c5d823178e. 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/NOHEK0201110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704e7cd144a03e46f552b7a0be6f630ac0019c3d48b0aedc7f381106955ee2a0. 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/NOHEK0201120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e799178b58e4abcef94071fd7a878bb8479fe2abf642b6028789654ce6f91f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOHEK0201130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edb827682fcf41b3071eb9558b2e89f66434aa7eb1153bb93c0ffaf8c4f28ec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOHEK0201140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec0365de6a61949a291ef25b71dfc725b53531f9b0e4585039c9e0af401eb53. 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/NOHEK0201150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08726d7bf35910693d5cde4d2a2354cf59139a344a57ef6c6cece969dcb538d. 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/NOHEK0201160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2312eab9df79f4555bcf7e8595a8f06188784fef036d11028fa5578731d47e1c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NOHEK0201050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea32299c33e18080bd5a9a7e999c630224945dc305e1692471c6a719e44e76c. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/NOHEK0201070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161de6eb3e4fa625d67c0d94df62de183e9d3117bccd48408f437d255c7258c5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NOHEK0201080.