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 0x18ea384e3de1cbec3859f43e49cc8ad2ba3e15ae61af23c16fa9fa41ec132200. 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/e0cd102e-7c85-4733-88d4-4016a72ee1d2.json and https://artists.proofprofile.net/proofs/artist/e0cd102e-7c85-4733-88d4-4016a72ee1d2.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 0xe99982820fa85a321a8b46398f61db8967014ac208bc978aeb66bcb8e7648f17. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FXR142300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35098ad61bdfcfee319a076cc0e2df859a09bd31d247373b762f9a5c6c72de1. 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/FXR142300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5829695dcc255b24aab8942b1ac14fb4544f22107a4323c9f964dcf75f626c35. 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/FXR142300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e84becebcdd85ef9b064e8f00a7ea86cb75e44c970013bcfebe1dcfa222a65. 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/FXR142300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ee1475073d68c6182a32320dc80a4ea1643d8067c9d267a1c188ceffada542. 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/FXR142300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e95f74beeacd19d8484f5f372423ba63342f23e308b2ef9a8529a3cf5d3ca9a. 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/FXR142300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0e00e8bb9a6372a99b8a079d3df9eec014df78efaabc294be4cc69b71f1d65. 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/FXR142300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99982820fa85a321a8b46398f61db8967014ac208bc978aeb66bcb8e7648f17. 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/FXR142300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2aebeff985a960530c9c856576d7a57ee24388c9f07b8c0438ac371f0d035c. 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/FXR142300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8f2f4c43a2657ba4985897987df50707dc136f02878fbe5ee8d0ec8244eae4. 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/FXR142300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffec7a35edcd0e58b1ac30ab0267681765a939cb771c3637550a0742145261c. 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/FXR142300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3596072e77ade88da65dd9ef4d5c9bc530539d4bb8e9702b3249577cc765fd52. 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/FXR142300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35098ad61bdfcfee319a076cc0e2df859a09bd31d247373b762f9a5c6c72de1. 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/FXR142300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279b98b610a58e533575b003964396b80f972d48577ec8d154fc5a6f20f16c48. 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/FXR142300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4325f283e80accae3a3393594cdd869a964768ebae1bda66d71ecfb6b9e09dc. 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/FXR142300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71b998b2a9d18f6cfa8ede6186a43b0605d7097448da4b58db849b2dd85edc2. 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/FXR142300059.