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 0x6d85c2c8358dbc59aa48025355bb516dc9f49523d594a1641d59391e98ca519c. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6b4ee6e-b4a5-443a-8cc6-4aa4c5cc8326.json and https://artists.proofprofile.net/proofs/artist/e6b4ee6e-b4a5-443a-8cc6-4aa4c5cc8326.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 0x74e53786fc6a6c786028dd3178c927a1e3759287db2161ff184a48ea23161272. 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/BCENA2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa937e85575f06524c8a1b4b59c9e1993fa7bb0fbf344854cae53b45eb25fd4e8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BKGFL2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e59f74d0f06ff52b780781744f614fdb2be93a37ca81fd2b0d7dadf5eb9ed97. 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/BKGFL2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c1a944d2c0c45ddadf2d73fda3be783adcb294faffa463334a97f7463ec057. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BC9II2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726028f813b01cd778dcec0a23bf585d23f30ec1eb26f2ee6d3c7967ac836629. 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/BKGFL2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48621f0c46716d49215087afc937e6dba849bae7ce663db02ac2d8a9c8e27057. 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/BKGFL2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aedafdd05c327c5f341953fc8058d1c32c1df43793c1f4171445c1b7088f4f. 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/BKGFL2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4edc0172b1a074fc0bac99baf8f38cef7b119c7945c405b692837edf5e13b2. 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/BKGFL2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dd32333e7d729a56460377f7a09a41699b0c611af2f2e0cc2e063177224379. 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/BKGFL2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91a4923dfdbf71830c5020d0c0c9ea66959f94565a49b99d07557637c0b755d. 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/BKGFL2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0fb673498b0a46da54fa2411b3593d440fc43a0a1a83b6dd23d9caf4cd0f5a. 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/BKGFL2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa937e85575f06524c8a1b4b59c9e1993fa7bb0fbf344854cae53b45eb25fd4e8. 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/BKGFL2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e59f74d0f06ff52b780781744f614fdb2be93a37ca81fd2b0d7dadf5eb9ed97. 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/BKGFL2400012.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020ca84f1aedd06407d6e15d9e9549a93d21df0c11db25633b58321971613f59. 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/BRUM72201390.