thumb|right|A group of Igorot people displayed during the St. Louis World's Fair, 1904 thumb|right|The Selk'nam people of Tierra del Fuego, brought to the 1889 Paris World's Fair by Belgian whaling en
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 0xbcb9f95e574cbb7a21096631585a863b470c59a2065d683a372bdf1990e62138. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a20ec33-e44f-4f33-b54d-1ede4e31fefc.json and https://artists.proofprofile.net/proofs/artist/9a20ec33-e44f-4f33-b54d-1ede4e31fefc.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 0xc0769fa03c8d9e24abbf41ccec4d92ac665bc2333b65e4bfc36194c2416b9008. 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/QZK6N2328693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851afab1e4a872e9132608e9cf52020824d1c43e51e3a7c9a872d8d698850629. 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/QZK6J2338040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573db599c11b44c6f39ae4e6c1cb8c933d114a2a1855f6176c1ae30b9f23db23. 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/QZMEM2386210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be68b1c5cbd325433d7ed76d96e1950b8b6234adc29827debdbc931a196adda. 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/QZNWZ2385947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f3438dc34d42abc3c70edd7ae8b861716057441f82efb6985dba9722ac7376. 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/QZNWZ2385948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da949e990b46f6023dcfb59933f1cc043614baf2599673a6ced50cb9865508d. 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/QZNWZ2385950.
All In (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0a7bb10c877de6e1d9df562032531cc3e84ad7eef2cd5bb8016a9647e8334f. 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/QZHNA2324064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad188c0065159083264fc5ae1a7fe33b0f281a951b38256ef3d64d0b0de27ab3. 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/QZHNA2324066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2181fd933fb83180deb358c4851d90a7440f4edf9df7f804c2fabef78e7d2d4d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHNA2324069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999273900423b920abe3cd606c26df55155a772f07eb3168dea837062a653e09. 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/QZHN92391121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e899306512223c629f74cb6ab8409d645e8cf113fa221de7feea23c3bad42d. 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/QZHNA2324071.
Intrusion (Is There Any Reason to Fear the Pond?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f0064817f16b4ff6695ff3dc9c3fe3b21b27dbffa4aa9b96e7273fed3dd256. 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/USCGH1915894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c0334a66c65821ecf2ebaaa6fe295d4741a4f1dc1ef0240123c647bd1f70aa. 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/USCGH1915896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1ec778b70552fea5a123c59f6e0d5c6a1aeb297c27f249938299674dcf1300. 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/USCGH1915897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bcbb6819a5827d68272015be68f74aefbec8e627c7a63aa9101267817a86fa. 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/USCGH1915898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f5be5e4d671e956c7362278d48c82fa0da20c6f67c12b4892800412f2707f9. 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/USCGH1915899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc328fa89c63e163635bde1e7a06994c9a92e2b3f014b957d9dbde37e2f3bed41. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH1915900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad622e20761569cf5733309d4d52c77e0e533b28df8405a2861cfbd2e089e5e2. 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/USCGH1915901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdc070a0e27c9a36433b1f66636050e99f44cc17fb73b5110c3ec7db18fd564. 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/USCGH1915903.
Aphrodite, Your Electric Sexiness (Upgrade)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1231d41c4ff161fa0c1bd094fb57986e3f0ca8a9cc1870c7e8bc58b7d5234078. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEN2448716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573db599c11b44c6f39ae4e6c1cb8c933d114a2a1855f6176c1ae30b9f23db23. 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/QZMEM2386210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851afab1e4a872e9132608e9cf52020824d1c43e51e3a7c9a872d8d698850629. 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/QZK6J2338040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0769fa03c8d9e24abbf41ccec4d92ac665bc2333b65e4bfc36194c2416b9008. 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/QZK6N2328693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999273900423b920abe3cd606c26df55155a772f07eb3168dea837062a653e09. 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/QZHN92391121.