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 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 0xf8fe04234d83c56aa6452274db94dd104bdf8b2058820832bf20f3e2b092f23b. 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/f51b1e80-8993-498e-851f-c40dad1220d7.json and https://artists.proofprofile.net/proofs/artist/f51b1e80-8993-498e-851f-c40dad1220d7.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 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 0x2480fdeb05cfee428845d3f573cf4dc92713dbc0edaa13d8ff85b0f7cecf5672. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJH2537394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad119569376df1dfab9f4dc60be6404e5fe1578e1fb365a2b80db22f8bd2f10. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJI2537402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67888153d7fde4b9fe1b9cf06ab2dbfa8f6d94c9fe44fefe4b6e3fc68556bc1b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJH2537410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a41b15a94c3bd1ce470c4477cad7c27d8870fd4daeb35eb8877503e160970f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJH2537415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8048b9a62d134a9661f0bc122c72163e1c19f1c9d66f7648503541930e3a46b2. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJH2537421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ba3c974762b3d1a3abeedec3f5189a8283853c1e9a574eb883753368f33788. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJH2537431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa694150b9b1130b872f8e8711c8e871589cacdc56f90e30468dd5c89038484. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJH2537449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed0c594d6ff3fa0945a1d8597547248cdc01261843701481eca88f42dae390c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJI2537456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae760980a811dae32280bd0aa0764089c6f87fcac455ce08dde0e347862016ce. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAJH2537475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1c9f181c22c4f3a84f121e76967837146c4efbc641789cc5ff0f2e57d4a76b. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAJH2537701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631bc55a13b8df295f83c2e43fac48ec6272fc934fdc792bf663fc49846ad930. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAJH2537710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814816eec4ee6fcf8bf8036dd729e110510c6cfaee18b9cf5ef2fd2695c186ed. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJH2537750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab6fe7418616b0747aa7b997c7e1e0ec2c33672cbc76ae8cb6eeac4b9595a5a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJH2537758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c49537192df78ba1759ca72596da694018b74bd3b7f13c34a1391bcf3515017. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJH2537761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7ce7d047dc562ca882558ee8e19f6449b86b7df5e86da26b2a5fecda82c408. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJH2537767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45feb9ca022d2b013289a63c5242a2c2be27d2dd5d7616ad70a7994e9677027a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJH2537773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef3b1f2745ccf6e5f7150292f9f0b7bb36b3786d94e2ce3d8b7492c4207b762. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJH2537781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51726e470edcbce2cccd976b8905fd3752f8d9666bc6946be377e5ef85aa631e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJH2537785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658a10751add5e1100a296369b7093887521c0e95f3bc63719a9f0f8e3cf3072. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAJH2537789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29200ac1bb7733d8c7d3b9aa2583cc86a0c2b9c718cc787ffbadc305c361344c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAJH2537798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e1b320c7053d5083dfe5612f517466e2fe2dd4aaa875522b998af67d541625. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJH2537801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab7a43206e87a4b88679286d22184514b98fa2cd0f767c69256680fd6f0e794. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJI2552776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac39f5076f821111a6bda0397367dbad918e057c16a1021fab2b6ce67ef075da. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJI2552786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd0c5bd5850297953fd9da64260d4dc56e788e0ac915ad5ba5a9251777650dc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJI2552791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f3517c3acea6831eefe3d8990db6e96df1150abe0cf7b74a7cb2f232d6ca1a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJI2552796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad30657764be86d3062d29eb819e196ba87fd8cfc63e94d6fc3921415e4b44a. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAJI2552819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb1afc18f80823eff3bef6b5222d59a9807f52afc5fb42dda533e771673093e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJI2552834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb55997271f62fd2421390dfdc083137796e83f1184c9c1e546ce5477b9d96fb. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJI2552847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f379bf36eca917078d5c717306ee7bc18bbc47c8b3ba22ac64009c2b5a3fda. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJI2552879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd499423490d54d0d5586f97812c9c12b584598f2d8ec68e63914b235d8d58bb3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJI2552883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43722afa29ca0a3078520a4c23d431e53e964d93a6808f6c457615172cd3663. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJI2552923.