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 0x599a70fa9d9c6a1b61fafdefbc3f84098d27a484829418fcf7c09f25f7900bf5. 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/530dda7a-db6b-4559-a7a9-64f2dc89b695.json and https://artists.proofprofile.net/proofs/artist/530dda7a-db6b-4559-a7a9-64f2dc89b695.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 0x24e7cddae4ddc1043ddbed530cd3d58b93a12361c83b5a09e174de74c3e2457d. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:50Z), 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/QZFZ52122876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa237e7ffb8f8afe39188e5814e568a585fa43f70cdeff257761ae3364f93bf8e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ52122877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b2e234052c62bb15165012d2f29fa2a2908781f7394347b19f90b79bba2e1b. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZFZ52122878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc765319afd1905705dbb15c2b4f6324f442741bd3656d615a002998c1494a0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ52122879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553f6e8985c567ff98dd93c24bd53a612c6923a313bad119e2980bf38c2b715e. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZMEM2382772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a25f62387188b7909d23836f67ab68b20375085aef1bb682f397eeb067bb64. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWW2337999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7d19b0178c7249757949dfe0bb40943902f6fbcb9b045bd8ea9e39bafb1508. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZRP52384253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aca937da033c07fb0f1e93cc8e960b0cc2cb913241551063f3e163cda90c678. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTB72335251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016d28581d5401ba88c25000dd2d4ed0ed434cac80c9a103457c0b2e966b8916. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTB72335253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6d446f99ac59934306062460a7ba083d54f3cfbd588f5defaf3e84abeb3b0b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB72335254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3457e15b4b2e8f04f8dbfc9765751141ea12f9ce625e6a1e9e238fd2992998cb. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZWFP2331831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5dd560ba143467d601e13d5cf6404697c2f292b8e38da00a65ba93800b050c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ72400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3d56b8ce8b5c78b85f4514b0d84102d0458d1b0af615989e8f0dd117f91254. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN32452705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6096f08126357128026b387140d6dd72ea2e30a26f64307d7177e33dc52b4a18. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNA2432968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bb7771a64703ff5da9c39419731d05e9e93dffc1843630e4be6235a38e8411. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:34:00Z), 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/QZK6K2478262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe451ac7b745ce8b5b7a2b057bfd790757ecee1e380c59031c666b2abfbd849c0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEQ2432821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4337dec9d64514878480ee9176a40dc80a6765ee804b44ddd74e3d84aacaa562. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTBD2458508.