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 0x6c89b5e1b9538059db77ee87ebce6ff12f1b6b2a25a3949a21afcb762036e2eb. 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/ffdba53f-843b-4736-86d2-b3e561208451.json and https://artists.proofprofile.net/proofs/artist/ffdba53f-843b-4736-86d2-b3e561208451.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 0x06ed7992c073164b082fb28b7fcf4208bed8dcc683a751af4658f95a34b8581c. 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/QZHNC2424304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79db1dc9e5bae278f8069cf803b8daf61ff50bbd95df8d0bf5b5efdd4a67bc4e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHNC2424305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296c8055cd9f2dbd1464ed45e03c1983a8639fe0c8bb4b4e827a56a02038fe55. 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/QZHNC2424306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba05b150637c94a31cb030ee1c854b5d68928fac73a909e5b55cba3e61423c56. 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/QZHNC2424307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651d35744ab9dc6be73696c7a48204b3b27b80bb102eeacc778191f2aabc6224. 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/QZHNC2424308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0003787d80811c24710def2d175c6d2b741331935a2b665266291ebbb5081b25. 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/QZHNC2424309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3593887ac21c172f4977020e3703347a7353c31a5658e24e2ee0bcdc850451c9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNC2424310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5336455c2aa06ac38b40aa0b8064590e26867c0017084944dbaefb70dbb2c83. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNC2424311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e090ff9b692c68dec182c4689cdc64373f14f68fe6ff12694f6df8a39863e18. 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/QZHN32438272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a356b085657ef3643305252c94e8601082e047f7150b1a1bef88055b078e089. 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/QZHN32438273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4beb9ad39bd1e43fb6b763495fcee472c3e23321dc1f3af34af6c2f03c9f43c. 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/QZWFM2336162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe687eceaf7f79f8b19408099b7289fdf26ecc69bd5d44ea6fba7dc086bc83b52. 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/QZTB82354369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2dd610b8b6ee393b23c21b5755603772fd4c0ef9f38faada3ea505a1feb2d2. 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/QZTB22347821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14afdf019fb0ec99062dfa3ef9bfcd94daaef627ce344f356b5c03bca071453e. 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/QZNWS2351534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a18e73d63a968586af5ca014f054dc0fed2ce7f117307b1cea39c7c789deb3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6N2320473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298590d8d34d6d024a9b955e7c01a55423c64a79176e725c65f7066dbbc7c2ae. 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/QZDA62303019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4d5dba857dfb55d36c63e13a1dc375158ab07f1a4c7619ada5ebad9d242992. 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/QZDA62303020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c6d8f9c29add1004b50732188288336f310c9aad07c34845157bf6f53c7980. 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/QZDA62303021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028ad9bfbc6d7c91e121dc8ffd054fca7e848afac4bc1a58888c230afb30feac. 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/QZDA62303022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322da22ff373527df70eecbe4972f7b112e5713b124eaea27f1ff443de421cd1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA62303024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc064a59637c134e2bfb2d492a2049991643b6fbbafcd6d9ac7975ebbffb2903. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZDA62303023.
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 0x4bdeb39d1d6a2983ab9804baabef9c2b033f27cd4929867d53ef4d01157f289e. 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/QZFZ62369207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5248ebb2fab1e4dfbce9ef23b5197ef4c850ed8ee0e725c8c9443aa8056cf0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZPLS2289971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8759f92c3576058162e48bf56faf97b2506cc1a074564bf834ceb2f147ec20. 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/QZMEM2272389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80f48918aa2116425726d5b40dc47bc780f5043fe2087a39b4d6ffd992743b5. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZK6P2281046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e181fa20c198753b38568dc1c4aa2f0d1e2e89a5418dea08310851c19ec616. 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/QZHN72206909.