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 0xb987b127d360afd4f070b6840c21cde5aa9e637924d2f7e99565ee624d64159e. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1154b046-b2e9-4765-a870-f8f8b259ffd0.json and https://artists.proofprofile.net/proofs/artist/1154b046-b2e9-4765-a870-f8f8b259ffd0.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 0xc4a33be18b1ccc53c18aa5a9c8e1a99902eb3de29ab3b6d97daf16e7d74141a7. 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/FR10S2304135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1283de23272b52c8f365d61caed6c97226339b8f9b1e9035bd8e5f0cd86239df. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/RUA1D2343483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489f5de85852c39f64d34a194ccfcbe15e467af5ead56d6d13499949060050f5. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/RUA1D2359690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b44b6c97736f0e9347b89758fb8eed29dd56ac5bada1969c23da5052bb6b7fb. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/RUA1D2373495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe612b69ab86bdfa2198073d829bbaf682443eaf4eb94cde1daf7bc955a171e. 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/RUAGT2349955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4385718b7d9ba839847d4b28d3f289321544b623d3b622e6bf445e870a6e8a6c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/RUA1D2473136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ec7f6f15ad577649ccaa6d809f562ddbf353807bd8dc4963a40e1ef7abb4bb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/RUA1D2514274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77774eb932f2d905037af8702a2c8e8abb3c242e11bf75a624da94e850e67cb. 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/RUA1D2514276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4385718b7d9ba839847d4b28d3f289321544b623d3b622e6bf445e870a6e8a6c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/RUA1D2473136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2537c11772bd1a4a8dbe836ac01ab0d50343f6b907e7abb4091777d4f09032. 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/RUA1D2514277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e1c7d75ca8b6c77d67c750e96588847fea50e72a723d7bdf66f7b17d6bd25d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/RUA1D2514278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49efc9261e85c7f6172dc027cb24bc967a4f281b65b74a2e1ebcd7b8c77b4286. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/RUA1D2514279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ae0b15c3a8abc29a1c8dc05da0cf6b51842845b29810e6b307abe803078054. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUA1D2514280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe145fd7e4a6e6f8ecb70cae16a3b754df02e767f3d52f55670aca0c640a9a3cc. 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/RUAGT2465788.