thumb|Sierpiński Carpet - Infinite perimeter and zero area thumb|Highly magnified area on the boundary of the Mandelbrot set thumb|The Mandelbrot set: its boundary is a fractal curve with Hausdorff di
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 0xe59d6d3eed910d61993d85a3a62df877c818f9a04715ff1cc60abcaa089263df. 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/55f4dece-3938-49c4-9c33-9b69214ed1e3.json and https://artists.proofprofile.net/proofs/artist/55f4dece-3938-49c4-9c33-9b69214ed1e3.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 0x61b679c506c3a77ac2cbab59903e6371d32cf3f88101559005a760b1586f87eb. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/CA6D21000258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9015cc29e7d3d336f8b21c3360de92950b48ee8d576e7ff0fca9c0393967de. 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/CA6D21000308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057fc3d5d0672b8eee25f3275cd0c1bf4b00fa8b61fd805c2ad763bb9470235d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:51:50Z), 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/CA6D21001043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa552b73b8f5846ac951ccebd2081e49e247863bf1c3b23093080c14c9368b1b5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CA6D21400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc847891e64c47723fae88679f9e7662ccf2c7acd450f2f011e0f1a3467be45b2. 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/CA6D21500348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e381893c01fe73af5faaa25aeef2b483d2f8dcac1796a536de436ca0bc3889. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA6D21500350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2684113abc26a45143a384ef702d946ef16870a5b28c6eeb38adc88b9adf716f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CA6D21500351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05713fb91e9200f095c7d290504d7ff11ec94b09cf70ec557c14eee42d1364d. 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/TCABS1341054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9118d211c42db4f634014976331d241a3a95cdfe3b44a48d85ce23f23a50b70e. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CA6D21000353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc847891e64c47723fae88679f9e7662ccf2c7acd450f2f011e0f1a3467be45b2. 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/CA6D21500348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4722d5a67d8a1a2401ff432b0f469bc7c0b4cebd1de3a1585216f238ead54c. 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/CA6D21001047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05713fb91e9200f095c7d290504d7ff11ec94b09cf70ec557c14eee42d1364d. 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/TCABS1341054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e999b9db2c8a0c4670103b0fb59a52c4811d546edf03c71e49df4ada7ceb019. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/CA6D21001025.