C5, C05, C V or C-5 may refer to: Military use Lockheed C-5 Galaxy, a military transport aircraft C-5 North Star, a 1940s Canadian military aircraft , a 1906 Royal Navy C-class submarine , a 19
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 0x930fd071fd57b7aa99694c2ac8c89a75c0c7799bd60e0abd2e27940282746a73. 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/580b74d7-2e49-47e5-b496-548556d76291.json and https://artists.proofprofile.net/proofs/artist/580b74d7-2e49-47e5-b496-548556d76291.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 0x2528afbfbbea37400b3505aee0ee430e2f8d0274996a2959c3ae6fbff52e4f84. 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/TCAHZ2484673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef2395d9e0974d5dd3d2b9539f4bc502197ca5549aa1b706967485a8e5f309a. 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/TCAHZ2484797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b83ced9f3ad73e93edb261febaa5b5e6109f314d2633a68d319d4bbcc30d61. 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/TCAHZ2484934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6758aa8535f30be021d60693eaa0c4fae03427281d8a00a1fa84ab20339b39d. 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/TCAHZ2484948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cee8b109a5e15d58693bdade85deeb45e493c576181be4329454e226bc424f0. 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/TCAHZ2484953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fedd551fda5e24cba8048e22a129732fd886e028aaaef01f6e76a289294874. 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/TCAHZ2484995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d80bf064204492db59a9ac1cf6a016c0817cf7f76d3a26d30a5a89a1c1a799. 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/TCAHZ2485043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5bcf72750f2772a6a0ff2c8e5c0b3a4233156cdb0914d0c1ba68f3d8475fba. 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/TCAHZ2485085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49559e575e425b52b5ea1af164fb82797a72d5b1df7c22fcaa7b652a52ae76a2. 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/TCAHL2358434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81a57caea760b7d7ae7a1498b403d5e0dd8c37f0e0304242561df2caa07f784. 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/TCAHZ2485130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de79393119c65cf7d774e6af32a38d0c48c0aba9f2de54605269b05ec44d8b7. 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/TCAHZ2485143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c288be4d1a8d24ac67515ec3b1c38561ea239c8620ee3dcb255ec18d07d857. 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/TCAHZ2485220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5ffbd6f4f0bcf8679eee567a9c9bfaf3891ce76bc328957f566613ea7d223e. 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/TCAHZ2485329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75484331af95740f63179cc19f48b80dff5baf6caaa43406ea0619620579214. 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/TCAHE2351076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa508d79e0f105f0badf8eae5b0678154b3e310168f052c0debcf91d7c31ecd93. 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/QZDA52232620.