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 0x369ab0c9bb8820be4f92939cf879753bf51a2467c1b603702a5d5fb4f8299931. 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/4d53a154-4b47-4341-8b71-181cb186c480.json and https://artists.proofprofile.net/proofs/artist/4d53a154-4b47-4341-8b71-181cb186c480.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 0x4e20f22abdea380d6d00daccfae8cd82e3aba59fb429ef3f125741e43ddba831. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NL6DL2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152fe628540cd89fdd1cd7c1df981cc926f3d11b5978cf9b0728a5a5bb740ef. 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/NL6DL2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e489a45a6c2776214e130eeedd0bec01e964887e149b38f50c5495606bb188b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL6DL2100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef00e2ee790039db4c4e3daed0727a04b99e86bfbb9eeb1c61ee8854d086a9e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NL6DL2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcfef64ba21d6f7c6ee622b31485e005da03163c4eb55e38c32860debe0745b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL6DL2100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0a1826380e78be582e2f5a840922000e819fce81f31914cef393f669b35b75. 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/NL6DL2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8365048802b308a1ac78074c5af058fdbd1d18e789acd15ef89ee09bdaa014. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NL6DL2100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6637282a608eb122b89b442057591e825858ffb6a41dbec9e6a26578377093e0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL6DL2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf409b95631c1571473afc7716ed119ba3e807736bd6b7121257bb317e6d6061a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NL6DL2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef00e2ee790039db4c4e3daed0727a04b99e86bfbb9eeb1c61ee8854d086a9e. 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/NL6DL2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152fe628540cd89fdd1cd7c1df981cc926f3d11b5978cf9b0728a5a5bb740ef. 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/NL6DL2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e7a9f0f878cde107cfb4ced74f8a1c888bb96ec4b830ace47a2b68d99fd1d8. 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/NL6DL2100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e489a45a6c2776214e130eeedd0bec01e964887e149b38f50c5495606bb188b. 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/NL6DL2100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcfef64ba21d6f7c6ee622b31485e005da03163c4eb55e38c32860debe0745b. 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/NL6DL2100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2d9fa061c7ce3e3c2328d16e72ac77cb0bda7c35272e1650855e27979977a5. 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/NL6DL2100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2b10faa4632d997ca704bff1139e5b094bdf10b62222fec485ee1a6ea2ff5b. 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/NL6DL2100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8365048802b308a1ac78074c5af058fdbd1d18e789acd15ef89ee09bdaa014. 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/NL6DL2100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06138a538900fc2ed2a7eb91ad79cc24134595a67fd536121845094cca4b4825. 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/NL6DL2100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b7dcc6ef898bef47b005dba8c55143c4b5247a982c10c55526917d5018e932. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:33Z), 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/NL6DL2100072.
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 0x96b9dd54fc745cdc174a37704f42872c210a08090fd1bda985ec4d6978c0a6c1. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/NL6DL2100076.