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 0xc513bb3ee3cac6c145e34d5a738c764d27a8b2cc10f3a7dfcdbccf9190c1feb2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8c1127e-fa53-4bc8-a26b-d49636a73e72.json and https://artists.proofprofile.net/proofs/artist/b8c1127e-fa53-4bc8-a26b-d49636a73e72.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 0x47aca94b1e5d885b3af86925aa8bec723130ec35d707c792871f04c65863a5a2. 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/USANG2203157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d32f26d7eb2ea1d7063d41a966a5bd6d89ad5f09b4538e1aaadb222767f118. 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/US3DF2255364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2340222e2edb8a406d0d612ed4d6189f3faffb1ca5aba1027bfe1fad71635a0. 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/QM3DF2163644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7e12adf9c034933458149ad07d206b903ba897b893e1225ee66e02fc724bd7. 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/QZHN72122364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b79c58d280d0e4dfe27f570ad177453a39fecefeb6ce60e3ef572f0a8c0b96. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFF2007504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5215f4c260b4b778d1a4122bafbf49daa01797b224bc7d17e832766825c66733. 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/NLRD52264215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275e24d2004db797fc350275ddd5340c85a974d54eb35010ccd8336270f905b1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLRD52264216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15988c7e2107d4258b55ba10c5ac8132d7cd93f86a174e1f05b29b31aa91e2a9. 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/NLRD52264217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d3f0d7e4ba7b9098e58b375f9a91fefcc10fbe2dd5057e13aafeed9cf4bfd8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLRD52264221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e02b09054a8f20d0ed87afb020271c2c907a52069b3a774698b900f4787b1a. 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/NLRD52264222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61950940d295d15f9e6cf60d6645dc8b52459b73c4996e1f41164fdd5b1cfc8d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLRD52264225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9d71c94a3688770989c9b0648998282f9f835fdfd7add1697bce60fe7e63ca. 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/NLRD52264226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37588f5a9c46c737d99389f15ddeda377ee4b547c39b569f072734ea250e84dd. 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/NLRD52264227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b958669203152caf3530c935225651cb457175b2b75bf8e998ef3e7844e1885. 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/NLRD52264228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9890b3f895a1d611c51c449f4817395f7180003607123ac1c027957ba29c0468. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLRD52264229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaca6c7610ecf6d00f7acfb3e0bbabba8ef7f6fdcb0229bee7117754a0e435d. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T17:22:07Z), 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/US3DF2214312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61460a20039fdec2142f8394b64748cc1454e23a5c09c8cc09e0a1715f3d13c0. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US3DF2214313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78df40c4322021caf57bc16f4e545f4145495d8f3b7995d3c4fa24f6a2c640e5. 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/US3DF2214318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bbadf91c770467de11041dc7f93788f54be06b6ed7c175f0c1a668e2efa69a. 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/US3DF2214321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd293eebabad3eede8e3c95602177bb29b4599e77a5a78d245a6d0b31701c457e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2214323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367393ed7034bf0e64fa43ccff642081d6db5a27eb7306b213f1f21e59db5804. 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/US3DF2214332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a404db731336c83b5d575a3bf0835b6e99b421768e584ce3ef6e92fbf390ae8. 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/US3DF2214338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18afab9586cd52c9c4597c75d4b5b9b2d8dea7a72d487883d0d24ec97ea9a10. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/US3DF2214330.
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 0xc4430a041a7fab5a224f8fb02d5333deb916db2d5f4281d3e7eaff69cbb561df. 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/QZHNC2084150.