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 0x42964b089b64bf0d51fe547f7230b4f73ee440d28a3ca161c8f6ee4431e17da0. 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/dc574b39-6e27-4041-9b4e-bd03529e6c2e.json and https://artists.proofprofile.net/proofs/artist/dc574b39-6e27-4041-9b4e-bd03529e6c2e.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 0x5c8593cf470d3f0160d10ddf22208854d4706b19c3af2bd9a2bf24b9b66d5d96. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLGZ20900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd180fac565ad55863b9a5ab9b643202a4651e8e3ab9dba25d77c2f249e7af680. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/NLGZ20900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43078f0792a878f1cf7638aee30f24cb1cfb7c8971afaff36d9fe68c98cd6556. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/NLGZ20900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67a225d222e2b1dc144e0abd8ddf7b839f54baba19dc896631ef93fc7b06568. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/JPI291065401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0af8eb6a029d177d4304265f0185b19458b894a6ba1a39a7e3ea4e294695fed. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:08Z), 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/JPI291065403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3841740047784339a675ce2ce15ef362d06daca13bf2fe0efd05d731da05f42c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPI291065404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec9ff208a3b79958e4125c8a22d406e579ab0ffb167fb57cc1c00b4e4e24cb8. 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/JPI291065405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fc2ac83266348b6439b1829ddc916a6058106599d484fdef8f3fa2973df290. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:30:36Z), 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/JPI291065406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22328779f4d1ba6c7defc24df38603de448e9a10e54fe3843020aeca496933d6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPI291065407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bec51d5590d07cc151ccda5819055e12a3a207cdec2a213fa8e6b7e9418e450. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:44Z), 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/JPI291065408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e45c2c8dd5e33683be79590719774e44e39983d90cf7acd5fe325d3964b3947. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPI291065409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e86b163753024a1d3eee80834b3fda90e5b33bf796e6ef47b08c9e57a28e7d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:27:03Z), 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/FRUM71502501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a48f4291f3102444eb9c2bebab864aca079cb15aa4b566e69e1c4b6f637cfd0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/FRUM71502503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b67b83f143014ecbf2b532df7ce3870aa02071cb22c605e25104fd0ddcb554d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRUM71502504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cfb18d97140f6a640a2ee70eabdae6191eeb6e7f0ad5abe8eb3187243a03f3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:12Z), 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/FRUM71502506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4050406fb3a82aac42dff426963fe5b1f225998cc1556a8884841162e09020f. 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/FRUM71502507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5207b35750fbd5d6ab6b05c7861f32034233845115c7ef82c11ade28faa097d3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FRUM71502509.