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 0xc55e92f29d82d92ba35a425352365436faeeb9f8327cd1aa45932d381a04ff9f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2282d92-85ee-49f8-97cb-a1adecccc28a.json and https://artists.proofprofile.net/proofs/artist/b2282d92-85ee-49f8-97cb-a1adecccc28a.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 0x90e07b981dc82f6cec963545622921af6903c8c1a315f22b27ad48393696a782. 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/FR2X42522711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc82e21ef575ef1771e138eeafd70e575d352c3f273c5a69b28361eb1954573. 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/FR2X42522712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee57c64bf85bc75aef1392fedbd6c2fc46232f7834459d2e7a605bcc49f7fcd8. 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/FR2X42522713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bb50eb1c2594e49730b179b269601dd8c7c68c569a0648d02de7ad18f1c5c8. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/FR2X42522717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586bd125c29bbf8407e803c4e1f8a38bced6745e64dd49bb2462479724c88f15. 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/FR2X42522720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa333a1aa590cfbe247358a34d4e2a56b6f3bd81f10aa053ce980b12842e3f04d. 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/FR2X42522721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0b4462aae76b84bda6ed69a04b04ad4aaf4d56389e1a40489df4ead6785d6f. 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/FR2X42522723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddb689da01135a327b60f0a34096dacfab745883ddcadc253db68822db6a322. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR2X42522724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fe0bba93c29fcd057b2857f884571621e10dc018ce6b6ad14388f7f84ec393. 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/FR2X42522725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460bde9f90c178d0e3dd2cc500472e8b81bb17c2cd27423984c98abcb2875e76. 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/FR2X42522726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde63a227ab2209387f0352a8987bbdfec5393f16e870d5dd47943065f5d982d5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR2X42522727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2713381e61729d94c614c3dccdeb17d7bf25be614cdf506d2d99ac80067ade0. 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/FR2X42522728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d63505696799e4bfbb1dbb64080b7490e5c5097fd5866acfd52a0b05ea88aa. 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/FR2X42522729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97b17ea4bb25b832ea7d5ad609281950306f6ab09003cb2e04f85e7a8d8cd76. 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/FR2X42522730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8e8e12f1e850e44acc89ce21734a2d668f3dd0f66dd06b509148e55f9b8a89. 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/FR2X42522732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366ddde0299792c654497e319c49c5d6350582067990c1c06731e9aa895d1539. 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/FR2X42522733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8669f0931226a9049ff87d9fd225ad841c117ce964af5e4957de84adaf09c943. 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/FR2X42522734.