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 0x1e2cf44bad51e287aca370d3172bee37f6d865c6ac647cfcc528a5d3aa16b833. 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/4eefae69-af30-4245-83ef-239569011a1b.json and https://artists.proofprofile.net/proofs/artist/4eefae69-af30-4245-83ef-239569011a1b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Discover Music of the Middle East with ARC Music
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 0x641364a2c8d9eb1003393d844203e0bba65ef6c2b999729757628f34e307a66f. 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/GBCKG0900502.
La, la, la, omri manhounik (No, no, no, I would never give you up easily) (Egypt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb773df68fdc381f1b0c0a7543004e54a1f3c02a02e41debc87f326c02735e49d. 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/GBCKG0900743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c61b66d3274487e54fde910463d91ec7ba7e9d08cb6442d9b3461163eb28138. 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/CAJ720531601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ece7207598d4cd3f2deaf18f3c8cc12242641aa529f53138041bb71d1852e29. 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/CAJ720531602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d403d0d12fd5cbcad3f4da2e5152943ad23545fe7899ed51728e09c1c158ac. 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/CAJ720531603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb1901c3c70dadb8e12984a5010e4a22a079ac95ee8acdb78d6719e9298dc78. 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/CAJ720531605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03bdec8ca581b36071474890f39216f600f6a65f92a38e90b747b2a49e85912. 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/CAJ720531606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbea2660dd3f345080c00763983e2fe1bc4ba46c9fa1577dec6877bb00f80322. 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/CAJ720531608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a5b975d9586f026a2b87a6bda8c5da524fd20394ac486b84a84e8199565007. 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/CAJ720531610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1bd78d51e62f73afcdd5ebbb272b6ab5727730849c160a9d78920cc3cac5e4. 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/CAJ720531607.
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 0xe408ad7e367316ed2245115c6841ad38a8b9a3e04cc6d2a363c867a845e82ce4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CAJ720531611.
Charbel Rouhana: the Art of the Middle Eastern Oud - New Perspectives On Trad. Maqams
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9d608f86ea74c40085ebfc539b68cd04ee5931ccbd8c22212b67d67dfb9772. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBCKG0702058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3388b1016efe265f09cdd312eb43573966f18361e8bcbbaa8d567cddb61c5ec. 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/GBCKG0702059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d558052d56337afc533a5939e2e88929f05cbeb54441ec921b47b299f0bf86. 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/GBCKG0702060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa6eab7583df2fa59d66911b2f6eb67987dda12b7b7c1991be02f064aae6f46. 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/GBCKG0702061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee403ee4868ef5dabce0af5120fb6df8d72272f9ace65a2bf61dd58fa87cb74b. 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/GBCKG0702062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41bc25c53f80a01f752acb8283b2d87a072893b3c77427e1fec4b9d84232000. 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/GBCKG0702063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f33a28009a0ce1bf8712837351398772990483e46e9f7a059d7fd207ed254f6. 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/GBCKG0702065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057059adb129239c9397ad891d485cee5f27b360899235817b1a04b588242e62. 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/GBCKG0702066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47b2e384da326ea9143b6e4894da357b6ca7c451b9aebb03a7b6408f7e42457. 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/GBCKG0702067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1133be2332bce063267fc2bc628519677d0eac9dcbe4e9bebe5a44efcbe568. 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/GBCKG0702068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74fba512327ad09186f47e7c104f402f80cc63b0b2c83850d87a134b906ac53. 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/GBCKG0702069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ccaae22cf8ce948e84fd61d7b4592b86f00bd7e29fe5423cff061492a8fd5f. 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/GBCKG0702070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46191600ca2a2426aee25d924395c1ff1997ed6cfd68c8fd7a03fa9e12bbdf83. 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/GBCKG0702071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07926bbcb95e5847b6502b5e0d5ee786abcda930f25ee74be5834ae64bc57ad. 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/GBCKG0702072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565884caf39fd1c2635e9cf48f9b64dc7fa94ea5dfeb23dddc1362f37008bd28. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/GBCKG0702073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede27e3696068d9b5f73ad649ae1a17121917ee90300df106e156a6c29147ce1. 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/GBCKG0702064.