Cuprite is an oxide mineral composed of copper(I) oxide Cu2O, and is a minor ore of copper. thumb|left|Cuprite from Tsumeb Mine (size:2.3 x 2.1 x 1.2 cm Its dark crystals with red internal reflections
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 0x5b5bb56cfb1b4b548920f3a1da184f88aa2718baa80285371bbbc07a9f549c29. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6dde978e-d317-4c4f-bb92-7a0ccaf79cf7.json and https://artists.proofprofile.net/proofs/artist/6dde978e-d317-4c4f-bb92-7a0ccaf79cf7.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 0x49d13a51d13b694bb5daa2bc2524f0802e288e0298e5611928c978d7a7a0e468. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBKQU1987724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6359c33ef438a535384fe81a5c7f1cf934503efbe3ac2cab0b06ce167e79a78. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/US83Z2488546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003ae76c7838353c2170eb548357e53bc5e832c741a381cad69ba02a0909a1d3. 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/GXBNP2410668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079db804166ee23c46ca41c6047ea4f5ad0a152afeedffdd01b9b4d1f1709cfc. 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/NLRD52201077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d12a637ec76ebff181ca1348898939c2a91071c3056d2629fa4098ea7279ac. 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/NLRD52201078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b982883f0be59f7998b801917ca85f26531e358982018e712f644aac4b4d784. 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/NLRD52201079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20fef80585759112ffc8ff726da875e2690466a33e12f2595b49bbcfb1dddc9. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US83Z2334322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb33d15105e2c8d02c472cbd3b01685b513f9203d5460322fce17ca53d528d8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US83Z2334320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b3c342206e8390a7fdb223fa8f2de079a84616a5f93bb843d7fac32c033843. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US83Z2319787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870977646addeae493594fb12a408aeb7e80f1c573bdce7f480007e665350f83. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USLZJ2369158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda50c99cddefd0205144ec27871bb87c0aca77e86e0389ecb1fab461d7dcf8c1. 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/USLZJ2369163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd48e0b04c618d3fcf60ae51c5f3490c04e74c76cabe98a4c86686cd2a9650b7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USLZJ2369168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaafa0473981c6e4e7676a15f50468bfbed1da4695a3990b948bfb7dc92c9949. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBKQU2293132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73667e2e2cf3bc6826168f8d0696c1690d0a9d879ee3a7f0a9ba6955917cd4ea. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEH742222169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd06a5cc546f9f5544cb4baf3187912274b450288a8a1c799bf0e474488effb. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/UK8QM1400762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc829e063eb24ae3bb074fe012309fbead978dba5b7ec56230d1e97e0b1f19a3f. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBKQU2204729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad39408b78d32b6191fa42e4436d8c943418bb1ac0b5a1a9b3a64e42ec4a3e0. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/US83Z2210305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2ccf52c001ba3652974b190cbdc7483fa1ba01d0ab6a0a551cf6058fc3fa09. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBKQU2231348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a82317f87898d876ff4d57817dcba1c1fa25678c311f36a5f5b9cee092e791. 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/GBKQU2231349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302fac6dfcaede45220f668ad9a835d4c9c70ec87d4747d11c534c5b0ea9a9f9. 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/DEH742154132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbf92565dec72290b5fa8d997bfbac3a5116da940f3cdf2dd0c916d3f6c68f6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEY472084836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40dfe64d841ce8ea856496fa50df136178f74ebf62ba1f1472fe547656080d6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEH742032592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dd66982d8be8acc3c140bd20effb03234e424fb25bd539b944fd101c3bcd06. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEH742032595.
Siona IV Anniversary (Mykonos, Greece) [DJ Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48325b0da117ab3b2dc34cf63c63b7c2af138a1c2cc3da7f96106f9ee0f1f71. 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/US83Z2324924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c84c298429ee4cbb11f6001629ea1217b5e33f28eca1152390af7840ab5d5ff. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/US83Z2210304.