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 0x545f786831088ae8e9390a3ecc8f1b7febf87f7da7ff68bc3a31a396cb405942. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c72f549a-34b7-48bc-913b-3b8caafd6462.json and https://artists.proofprofile.net/proofs/artist/c72f549a-34b7-48bc-913b-3b8caafd6462.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 0x9e30bd2e90828040c9ec549cabc1da6b260f16865940359ed6b598bc03e45c08. 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/QZMEN2238803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c939aa80026893a20b9496ab506bae4884cab12af4e984d9118112740877014. 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/QZWFS2309033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3294f7e9c0ae05743cd87df5e1e1f056ba0c56df632685ed23ae7aa0899d9f80. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:54:42Z), 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/QZDA42470229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8b785a5e673dbbef38388cbac9cdef8e87d0b2a4bd23eff36ee70e6d671db4. 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/QZES72401342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7423a3c4064afd7426b4a37a893ad51178c3d72b0f3733802266ad4ba730ab4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:52:16Z), 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/QZHN82414378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ca19cf4b3d845280ba08f34df4552a2ad4fe03d6fa3fb4248450c20d0a159e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHNB2461837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3a7704aaf4e4c27cb93a375d14baf6b1e407a91c2bf610485ba405dc76889f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T00:59:43Z), 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/QZFYZ2529508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366e64b592f52a903a96ea5c764936b0582cb5b1d27b04c02abfbfcb07bd862f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:54:37Z), 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/QZZ762489774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882303e13a1bfc6b8362a6af284882b845dc6acc76b846bbbe22bd4ca0b674b8. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZZ7K2485910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1487c600455ca01706d7f2dee550ae0575ad91b83e4751f224d4524963d1656. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHN42529963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5fa1e8eeacc4367a2cf05ae88001add8248f587854421231c7c8733a229c90. 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/QZTBD2555299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a381c312b41eec395b08423f6106ac992c3fc837cd8aaeb52fd57dbc02c55f3. 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/QZZ7P2487017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec30fe072c93d329c1a8914bd98e02467d61dd1567b2289715cd743b93dd4aeb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZK6H2468188.
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