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 0xc78052d04fbbffaccc35c000d04b762c89655b61a2ab2d7297927a537cda583e. 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/4d5f1889-0d95-4f39-bf94-94368f67cf4a.json and https://artists.proofprofile.net/proofs/artist/4d5f1889-0d95-4f39-bf94-94368f67cf4a.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 0x6a2c7aa84b29013a008ec96eda87e76803e2989ed15bbaf2d46055853407dd4b. 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/QM6N22221485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac3fe45f8de70218dc94448fc6b5eb2100244bee579f3023a30b693c476a174. 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/BK4DA2308542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f55e5a663e690bc680470487c626da7f4671a3423f6dd8c5f7341b9c22fd27e. 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/ES15D2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3756b2ff8630d3ce69c0e713b11b4d644aaff9a3dccf1c980e3f1b45fd768838. 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/ES15D1900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62fe8523099a90c6287fe95b00028dbc014ccea3f76be475b625c9806038050. 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/ES15D2000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ee22d2e00169587c1ee24144b1b3673349337fa7577f42ed856e96882c856f. 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/BK4DA2408411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80376edae4439b6d00ca12b0b5c1bb92bb02544023c3de22d1277c1dfc64671. 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/ES5152300785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027c52324d48db4700685b41d549fc60405a994e7d1c96b12484fd4174ac6bf9. 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/ES71G2237781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96110456e5e40a6f2137f46da08e57fd3a0f1858ec62c481a7ebfc60ac315cf. 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/ES5702101694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d8a82b1ffc5456e5075c00e7941e129082089b80189d5c9091e8c945468883. 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/ES15D2100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd97e1da3d8810dfaeeb6a2a397378e8c2142283141f9684f6e3d3aa5b05234b. 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/ES5702101639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bf0ca77446581e73cf885fcc52a111b82be43fe21df124c7b381a9bde67c89. 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/QZZ8A2410807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f55e5a663e690bc680470487c626da7f4671a3423f6dd8c5f7341b9c22fd27e. 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/ES15D2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3756b2ff8630d3ce69c0e713b11b4d644aaff9a3dccf1c980e3f1b45fd768838. 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/ES15D1900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62fe8523099a90c6287fe95b00028dbc014ccea3f76be475b625c9806038050. 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/ES15D2000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fad098cb3eefb8ffa286a46d966f085100c5d373222fc12621a751e3a8ecf1. 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/USLZJ2576097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cec88bc2f65735cb2af4d11377486c2b23bf6480cf7c060521ed57c78fd586. 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/DGA0H2481118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41e5b853d298516a81f823606c08ee72c1b41732bff42feb431ac30daa2d5af. 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/ES54D2100011.