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 0x49496a1ae06b8d8f1a4f44e48780806d62236752c28bf9021992ecfad2191260. 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/03983dfd-63cd-456f-9384-c6f638cb8008.json and https://artists.proofprofile.net/proofs/artist/03983dfd-63cd-456f-9384-c6f638cb8008.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 0x75641f9793d8585b37c6e24c7cbedd6b39836c92220565316d7baf1ef2ad9c25. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/NL6DL2100096.
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 0x419c314af9f8b606426fc4ff552426fa5af445e1f703d50d8cb6551b970ceb08. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NL6DL2100102.
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 0x417b2db010be19e2f0cdd084aacec4e886c978885a4165a7ffc4f31e04e1ea4b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL6DL2100095.
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 0x852a3329fdc7dcf91de079534c693d9f58b88feb480c700029f613eb599446c0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL6DL2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd343d0333739c09a70d1bbe17977271b6bac75367f38771eca40fb5d0adddc9. 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/NL6DL2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278c12a049fcaf807529675db586e4d3bfa3e46bf95def82d6ba39290137f237. 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/NL6DL2100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417b2db010be19e2f0cdd084aacec4e886c978885a4165a7ffc4f31e04e1ea4b. 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/NL6DL2100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75641f9793d8585b37c6e24c7cbedd6b39836c92220565316d7baf1ef2ad9c25. 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/NL6DL2100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab8ae488bee6c15a5142623984615a624083615745d212d3451b618185aa2ec. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:24:17Z), 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/NL6DL2100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9417eaf03428859afc476355ebb9f31259167b50ac9e4446ba54fc8d093cf135. 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/NL6DL2100098.
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.
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