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 0x5defe8b9592d0981c839cba56dff01b4b0c18c5054edc50e7a3f1508429181a8. 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/e59677f5-3e56-4141-a4b1-d47d7e8e6132.json and https://artists.proofprofile.net/proofs/artist/e59677f5-3e56-4141-a4b1-d47d7e8e6132.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 0x654e1a5ed3d30772c810dac89895172e3c158b535809689a27cddbdfda85648e. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZWFN2528150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961e0a4ffc76f2e82606befd3606f217b710c873b7308b04d2047493168ac060. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWFN2528151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eb4090b67439d19094691710768bac0696dd5fea7dea2444239ff611b7ed64. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFN2528152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf34a9ece58065c3a7b7dfdd4945c81bfe3043b4d8396dc23473d075291d06ad. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFN2528153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1f824d19d5f4500be3170e144b52fd4f32a7a4a9d218f4171b3ef4eff90e15. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFN2528154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e464a49e3450f0f0bfc90ca5a0e72b2f271addb9e3bde5afab8a597fc36dfa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFN2528155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e97178f3b509d1d1f58a5ea7f9509702fbd85f25c1eb0c2a103976d7cdf501. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFN2528156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6c8d3a418bc963b0e9c7582351db75b6adedc665a05eb52f19f7fbab47a54d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFN2528157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783d67cea5c314f597c2665d14148eb45007021940ed5c142bfe0f4511bb3b5e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFN2528158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4c86a6cb51aaf81da6bef9935a9b838f9dad0aa03bd624099b0d11092be551. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFN2528159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0415093baf740747ee752961febb413d2fa68197a13bad8c5ad25ea427329cf. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFN2528161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63e52879c3d275309fa5c261edf569489b5da22a83b8006441aecbb08322b11. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFN2528162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b1342af37d96fb801159edc75abf083aeb1851b5349bba258880cd49dcc88b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFN2528163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95f491c47b3d706c5e7c38b4aaffa3a0a767831de17b951a1d9c5b91c605389. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFN2528164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc490949caf7779c52f2aad52983d894b062914c9e0da6a530b06d0d47e5c96a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFN2528167.