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 0x5be8a54b15926816fd496e91222269356e205b88a56dba566f39b9e5850de908. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8cb5d4a-9c0b-4c93-9e48-1566f5a22764.json and https://artists.proofprofile.net/proofs/artist/a8cb5d4a-9c0b-4c93-9e48-1566f5a22764.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 0x8599a5bda110f48795892ce2fda58717e10e405467ee37cacc54fcde60b1532d. 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/QZVEM2356641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef71285cd87570c43caf142b4d1b0c56488db6699ab27cd104d98169ce0f286. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZVEM2376599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4643b9052d50e60d4cab8e0a3643930b2cbf3b6477840798d6107b412d68674e. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZVEM2376603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ced6be657814b2cf248ffd3e70498949cd921b1709f51a19a44f8b1f0a6837. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZVEM2376606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f066538e55b0539b1973d1e3d057ed172bd9ae107d582c3d8db021f46b4b3f. 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/QZPEW2401056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa797efd0d6e87045221d136706558891215a9ccdfa5bd66a26b8282edfc173c1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZPEW2401057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d59ae2ef8dc0f14fc10a630a8d824ffa5f9bf6f2e9cf1bb9217f46288cefdda. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:22:54Z), 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/QZPEW2401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe1aa48992bff7856605772e4e9be3429e1118fe6c3daf1d8b67c252df4cdc0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPEW2401064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b755587a234e84de5c905a260a11253168a2e60cc4d015137c8dbc40c76dc8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZVEM2376612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3cea5bf96f9d1e217eda62c65a9b6e5028228ff0505c2e740b84714a3edb4b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT2VB2435431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecb7a225343a0c5ef27bce8e49a47a9369cf92c42a5e088735461c7c2c8f766. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:24:41Z), 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/QZVEM1889686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f0ced79769034fafe348042920670edf5620565d1cf509c97ff546172d0698. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:52Z), 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/QZVEM2588435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8e9ec03527a5df078a55fa9c5cf5a84bffae20d9f02216c56bcc0f66b20ba4. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QT4K32508029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966ece099ff3f923cee45bef424fd05d400794f806e43d910a1af358837021de. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:44Z), 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/QT4K32527896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993c2b437680b1ba65dcf0a4313a09ef416115b787d81a0bf607c0bfb866cc69. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT4K52521479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa851e2cc3b60aaabe190fe71b2b62af8ccedf7abe297be8df910e6fe5505f227. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT4K52595928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bdbec5a861a7e99908da1b5140608f754ab362f6e20406045d25fb7c91b113. 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/QT4K42505251.