The Black Pyramid () was built by King Amenemhat III during the late Middle Kingdom of Egypt (2055–1650 BC). It is one of the five remaining pyramids of the original 11 pyramids at Dahshur in Egypt.
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 0x0d2de53e8fa64b08ab72108937d3d36e278bc20992d9443c7b62baed8862c67f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90d8702f-5f22-4c2c-893c-6f7cac4f3309.json and https://artists.proofprofile.net/proofs/artist/90d8702f-5f22-4c2c-893c-6f7cac4f3309.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 0x7469f49d7e6097976c0c2a2b1c1ae7a64d3468a2c341b3879df8fbb84c8b12d7. 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/TCAIG2438655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe007999e9972301a44e18b97dc17bd83261d1ecab28b09650d5f26907e434e25. 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/TCAIG2438670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74a54e71a7616af0656e116c72aef1123d5112b9033c1666208195af200ac37. 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/TCAIG2438682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90881d655eadc2dab68f5339d1e61b7a250597162137288da3f603ae15b08a77. 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/TCAIG2438694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1257efdd3be9f857c14a8aa57327cc0c0922c6306aa19b865b9e25f858af14. 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/TCAIG2438707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f76ec138e1e5e151f68bf31dc976a2df99b6ed7a4e47faf63ff15fc1c713fd3. 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/TCAIH2438723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a914976048a8767868371fcfb1bbd79dedc3c7e6e8238c23a134b50ee23701. 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/TCAIG2438730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5eb2ea85a379591ac8ba1209ff8a24e701a7e4a967dc9d88aa1d92c5fa652f. 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/TCAIG2438747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3f8238404668c8fc85a33383960aaf3604a3c92ae25cb2d7052f27c1c4638a. 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/USA371499597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88308d733494ce9357fc4570e240b943147fae6d23562c339e17e46c50c089b8. 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/USA371499598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f712d3479945f28b44b7cee9a5d279d338325ce9db92fa7e195b46ee9c35ee8. 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/USA371499599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894bdc074cc57e91582b76a77cc76dfe4dfc28a1ca1055b2ed3b3ad5560cc681. 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/USA371499601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba62e39a3904664a9cdd528346fc4fc18dcc482fa1656e837640b9951af4152. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USA371499600.
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 0x03d99b1e604e2af6eda35671ad302f98a79460577b461f05e908d5051ddeb7bc. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USA371499602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2560e99ce38da1e4dfbae0239872843e86fcccd0210950c6b70abd4abaee2f7d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA371499603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceeb30b2b0e16d5676bcb444a2c590d1f9cc9f85f8ad9458c6688020f37e343. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USA371499604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda78b7c04afa303a73af97c45a91ee4725ed39ec5666ee387be40fbc2c99ee6c. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/USA371499605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000d9293db6f7ee084073d05bc50c9ec5f4dc7a07a951aeab1a2b450960b5ff9. 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/TCADW1853237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf989c4d6fa42a8803717a9b404ab66d5b80d34452658fc0ff7510c5aa65859b8. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TCADW1853251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92428bd88b94a73119beaf34ad83b153a34d1f503e4b0b696269a45d24255b29. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:58:48Z), 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/TCADW1853243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f6164854a0caa7c6d31a133c2a8a251d6cfc024a62b1952ded55e9d2e5af7d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCADW1853240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf594131934a14fbaa13679a22c5ebe610e1d872ff7aa628af290b303f5195d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCADW1853247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac9e10df78f74439b2095163faa24f31a78c68183bff9b13ce37b445e316edb. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/TCADW1854315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33f213987e4adc48d55dc47c7d5c0180dd0c714fc12b10265f3d498c138263f. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/TCADW1853253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076ec759868d0a1ca645ce839e591fb966a1d65498725fb0d10d2b3b5ca3d4e6. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/TCADW1854256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a97e54ded796b986d83b14d2b396400c7f137d666c30ada1c4c66a2498c54b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TCADW1854259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6620880aee759e0fd94bfac4b396889865da37be9006aa7bcfef917b05387694. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCADW1854262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3918f7a121e56a0a8fce6c5b1b698c187fe00369192a3d6a0d56c57a9ff4b2a3. 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/US4B20600536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c88ae2bb9cbd0e25c6f0238cb5085bfae382a8862db346bd6af2f84e152b0e. 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/US4B20600537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fe92e282ed7b76008b7b45a0b5d1a394654a6c294896dd17c4e51bac072725. 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/US4B20600538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ee60b550049eb40605dcd9f674aadde89f98fcfd9e1fe05d6f52b816ff8d86. 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/US4B20600539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66c359cc10307dbfb8024d11d04fb819cfdaaeb27e43157e864a9c2e99589bf. 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/US4B20600540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9425ec708f4f749e39815f6ee17d6d4f23623e7782bb980bdc70beb90af6c9e9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US4B20600541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5a2403419508e5d6bdbaeef1d079b8011e9c2927fc88b0cf799c63352a77f3. 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/US4B20600542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d4b698fb3c78c3290cf86e12657505d3ad359f3a13bd4d0d1e28f04428f5f9. 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/US4B20600543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb3f01834acef636f9289a5b83f4a69d4bb1f342850ffa048733df9b29f5f2c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US4B20600544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01ce73702cb646742d45108dc385ab208657ada785062533d21b7d4e67c8996. 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/TCABM1362484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f0e3ce8c176bfca576b11ca3f674f1544d6d0ca1bb2741e4188bc197cf752f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCABM1362481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9befb8d68b0adcdc97fc0994b159b89dd77910ffd411cc7015dc1d6163ad2db1. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCABM1362482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36082971955b0e4a24287739b56bab9f30b943cd93eb20434d2fe62e5fd8acaa. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCABM1362485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339c78db44f6cc5374054bde36b0d752d027584d0808d45f13611f2f1fac733d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCABM1362486.