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 0x020b7c92676fe1dc7f2b27d0f1c50f34c7a4196d99a438baf1f1e00cca9a3bfd. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8110466f-ee79-4b91-8417-f8a35da7baf0.json and https://artists.proofprofile.net/proofs/artist/8110466f-ee79-4b91-8417-f8a35da7baf0.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 0x7f453bd01422061fe22ed7f3e4e4f10ffde9b77d233e1e1761c8e481fe3fdeee. 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/ATA019000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaac58c4c142614918a5820f9bc12c263a3e12eaa61f667b1cbdf85b805b1caa. 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/ATF068600830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37084a0c017df650bfb31c96f9c6901efab06b4039d12ba295d1c0866cf86369. 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/ATF078200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a21dc53d446d38e637fc183ab7426293943ae6b11234f6bcd2079b1c1232ddf. 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/ATF078101440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94ec2be829d21e8a2b23a85dca00ec6b74bec9d779ba8c3debaf459342b7aad. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ATA018500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2c8ace328d3297589ca4adeaa016de42dd455f3e5cb54b85de417171de5d95. 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/ATA017600480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d03a74b69ef36d908fb03f1705deeeccf0812abc75bba414bb13430d37bda6. 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/ATF068101350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ece17d0acee8bbd646a4a3b210ecaa5dceed4ec8012fd8687137dbdf144ecf0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ATA019900020.
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 0xf0239c9a8460f744d799d89afa9313ca5dc119f357580adbf5c6b9d3a96c3f8c. 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/ATA010300364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a094aa91fd70054196e604c7f7fd7482cae072d0a067ad82bc9b2b72da8f1a8. 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/ATA010300369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491f1e8a862b20d6766c533b84ce0cb700df13a4c50b96cc49371b1ce3ab8976. 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/ATA010300374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf787499aeaabd460dfbcb96b3aed213a5e7743f2e656bc04f6c2347cf0f320. 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/ATA010300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1166febe6e8147443555eb5e751fae527170fa67b88f100c623454a425bfc53d. 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/ATA010300389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa707a6b00371de5298879ac4ca43250e5351e853843babac87be97a3135bea16. 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/ATA010300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76365f9b281aa90c2756f067af99b2ac05706ceeee24f5e8e2123c7639f6c34c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ATA010300365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98faf423256e1c413059ab56ca292f55cd9065d9b784f46afe7fbd09c237c190. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ATA010300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596b1d4cb9ba06e6c84a8f3ca535669ff57788f7dff5d27f981e8d327a1112a9. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ATA010300372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4fb4b2577ac65956902199cac1966baf3936fbf40fec9b1e5841dae8d4472a. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ATA010300375.