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 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 0xaf964e3f6c495f75605939adcd5a8110dd69ba8f7c365ecec469132f204ad72a. 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/2bab912f-2c6f-4cc2-bece-a3339f6b4f03.json and https://artists.proofprofile.net/proofs/artist/2bab912f-2c6f-4cc2-bece-a3339f6b4f03.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 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 0xc035ce3e3299df3dfb0b06656bf21d039c84cb21cc2a5829ee9f2f9fb12b733f. 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/ZA56E2201371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059ff027df60e6944d8e6a3313faf2564bf268716cad7ab8960f20d3bc863a6d. 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/ZA56E2201385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4de3cd706ee63962feb27391b4b29680fdf0449024c30c7c94dfdfeec069e23. 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/ZA56E2201386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a992809a22c7bc1f64907ad1155652925831c6c1c72dd9d9880b74df6b52e7b. 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/ZA56E2201387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207cc8d7fc413f212024ca18083a02fcdb16005f266daae56a9f5a1e29599dcb. 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/ZA56E2201392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1366c2f66d1539af3a24578e7be26cc721c9460540a5f9a4153a2c1164690823. 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/ZA41S2020925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcb56c3cb3e156f94099b0b9a0e960b70c3f8042c4b0c13b30e47f10f95f7c0. 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/ZA41S2020927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5005087d60c5af05ae171070058f6463d56da64983a4d7faa2ca0c57fade57f7. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:25:08Z), 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/ZA41S2020928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6881b5af9e30a4a94e3ced1ab13bcc82cffefffc52d06c4e580c975d0866e0ef. 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/ZA41S2020929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd07a71b1215c3ae545a283832b449d31ade8892a56119d31e3b46cc9a20644f. 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/ZA41S2020930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50a33952c8e7ea32d44f6822603aeded627e01d424362df50c7b2f0222c691c. 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/GBLFP1799317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4147e027b1e6b460070bfd8cf7baadcef22c900e3e5c1c6fb965f606a8d5c1e. 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/GBLFP1799349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bb9840bfd9b07cb496291e245f351f2714c0d7afe66b8f0a1bb6a9de948d4e. 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/GBLFP1799353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92e1473015e458e534a9554fad03f1acbf47d9b340e5f99d44b9bc3e908a432. 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/GBLFP1799355.
T.U.T.O.R (The University Take Over Reloaded)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bda2e775d96eb8f583206054b3c4ec824465092ce211da866cf70777878daea. 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/QZDA72426465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde91167e443c104486713bf35d027cb317fb40ec66991e58e05da86f8ba717b3. 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/QZHN92312788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe9cbeac502c19aad73119b066bc38ffe916cdd00a9130f4c5cc2f43273d449. 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/UK43Q2279641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841883af9ac2cf3f22a10c26eb8e7d2b2c0746990a0b05f6275b2a17f975167b. 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/QZDA82282489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcde6a0f4db0ec2ac3eb9cb0e32051367a34232c4ed1c25c643a49a7306ec90f. 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/QZNWV2182520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd982104d52641ba1c77489826a64c778c51b005569854c8cfb1446c3090b7dbc. 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/QZFZ61938177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b59e652dd659c7ece4538c7c5d1fa46fd19b8703421ddb177c652208e723ab. 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/QZFZ21924275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7410373bc5e2e75c3db6b30034ebe530c3660949e6c24e130de887650ec947. 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/QZFYX1916094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a90523434ca479298af39e1d4b12001e9fd57918afa57159dc7620f02f97cf3. 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/QZES81923476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7080c7161b7ff8d0bf7a872ba138be43d942324036f414193c2da89821638da0. 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/QZDA71950691.
Sad N Low (XXXTentacion X Lil Uzi X Drake Medley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47af2416bfcea890b9e5fc1ef25ef8678d83fa4bdc33c21dd5d9e3586ec5bc6b. 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/GBLFP1810157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b77ec3b8a8ed883d14b977ea9ed76184e4e4a15525078930306d25b521976c. 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/UK43Q1705374.