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 0x47f8da1e6bedd9a03b511fdd92b324c6fb62a0e08aabfa075f12495cbbe12a7d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd9405c6-e7e7-4d27-9c48-a1c08f3455b9.json and https://artists.proofprofile.net/proofs/artist/fd9405c6-e7e7-4d27-9c48-a1c08f3455b9.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 0xf607f2c5da3bda1355e6b7b155dafccdfb9b2061bee66deb96e96a2c081fa9e5. 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/TCAEP2041381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c297223ea0b077c4a326dc34dac6192815f193b5aeacfefea85ebdc1c1f86d8. 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/TCAFE2022490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea315b2ac9cca909843a0def0713cdb172be0c8e95deae27514c79446c59ae4. 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/TCAFH2089806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c297223ea0b077c4a326dc34dac6192815f193b5aeacfefea85ebdc1c1f86d8. 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/TCAFE2022490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d4d517fb58b5248382ae931eb00f6201fed632fdba19c0db7e6b0b7831d5c0. 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/TCAFH2052447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9187b9d0108c6e322292bba60d32956bd33621b793b3ffd3855b5ce7e7af53. 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/TCAFH2092836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e436f72efbd176b8e722abfd3228f2a097160d8b5026f400d159ad0b7244477. 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/TCAFH2092927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ae4bcd57cb97443d28e668bd767180aa3daf3abefdc16c4f605f69cfc685c6. 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/TCAFH2092933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcffada80b948f7b1e4ca413a01972aa8a9ce51cb3169a235c2f95a220a7ce7. 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/TCAFH2092941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d3e244f0598f2ad84acd0f153042e5337353105ffe3849ea53dac52652feae. 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/TCAGI2257313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe529d8d50dd5a02bb7927523f97a73ab2e0d4e49abac0505484a30cc2e3de30. 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/TCAFY2104155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dfc6a1159e28d53882c81e85e5595e6d7cf14bb5da457219e94a7f62ef7a0d. 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/TCAGI2257356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e23a6ac368100913bee51671b2ea5acd6a843cdc61133e55ee472a9c11a635. 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/TCAGI2257365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e73ca2ec9fdbc26ab016f5a978a21f2a492485d21c764f5a70dcba371a310. 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/TCAGZ2307974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aba0f15b992dbaafa365f58e35954b3d7daa7f504c86c3b42eaf796b3a01abb. 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/QZHN42077949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79325af0c0a8ca684382a91035607d364bb7c63fb6a96dee030ed4579210f488. 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/TCAEK1969558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f50f7076417cd26f46158d5c8b43000f900367ec35fca990d10792debc2c3c. 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/TCAEK1969602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc09c242f21db46a05c212dab5989bb8b6b9d352a84aa8c905f72a45e5b9cbc. 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/TCAHW2451685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895f4b2190379380ff7c415671f3f19db9dcacdd616c15bc3c0c2680b8008e38. 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/TCAFL2183959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2ef09a6a4731ce1142d89e1184acf61189f0a63999ef1da6ecfb03f564e352. 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/TCAEN1958564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb484b1d4d326215b9667cd31eabb834ba28a8a1a44e6b6ca873fe2c8d0f94acc. 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/TCAFY2168155.