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 0xb9a720063bc263c983d4dd641acdfb0004629c6e21273bb41cd89798af4e4618. 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/11c88e34-d60e-4917-8990-ac757b3f20ef.json and https://artists.proofprofile.net/proofs/artist/11c88e34-d60e-4917-8990-ac757b3f20ef.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 0xf6cdc3f50d203487dac14120f416c16e0a33c79f2d25758392a7f847cfe5db0a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAES2018410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ea7aad694c5471ee680c4764cfb8d2047c8818badae6158faf24c024f36ea6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAET2062596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a13e509524cb854b37987a07039e2a8a0cd9f9a20d170e066551adb0cd0762e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAEY2013120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741acc25344269b17c6e2d5fca817d4d94ce25255d5aab1cf79de5f2afa69db2. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/TCAFD2084487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a4e55321f4ae10812a3dfab14d229add6ed93a04fbb7d928a4a93d1e0e498c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAFE2033695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81ae069b6415beef66a94cd99b6a01f40f79dbb1d5da4bce672dcf0c02da3e3. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAFK2199819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6769da367b0d43aa06cae1a0090cc06cc05a6e86156f3a82fc2ba0f75d953e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAFK2199838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abe040ed4a4285d6409ab502e4e06ad85c2c9190e23226590b5691966c66a74. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAFJ2164990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501ed86caad1c4b7f1e3a7f7b819f9fb79e88b4d4bf97b09f4f8ef9ff806182b. 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/TCAFP2192289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c636da3b01846f39818c1b73e46d1b8c67083719a49bb335ec976d078aaaf3b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAFB2096439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f38e34d6fee72dd41d1224087a0c4fb98364bae9e4114a9ef9f2fb0f83efee4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAFW2184558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e018297cf5fa3e8c3f8bdc7edeb804896d3c949d2555c55d7329852c2d7ef7. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAGB2278893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97c7788789075f54bf5b793abb4334d02be8f8b79f5327758b91a76d7c1964f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZW9M2258353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc20be0b50e00c948c4ba6d2f6c25abf9729a0e4ff4a9f128a97952c9932a7c9. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZW9M2258355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9e618c2c27469490438b0f67db83aa655fa06e3848e2283f17829ea5b548c6. 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/USUYG1359522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c8b046130d28132e28b068dfd8adcd4a7e7b7586efad6d667411eec55cf829. 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/USAT22400685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44d4a779be34d92917793cb75ae163c1af5c8acd6194175c7fd1b4c1c95b175. 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/USAT22102378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aef837a6966e89e8c504dda828b84454594f0cb6e4c1bd0a2c409f5ed2a87d. 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/USAT22005737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9e618c2c27469490438b0f67db83aa655fa06e3848e2283f17829ea5b548c6. 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/USUYG1359522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c075a8e3396317d6054e1fcb57bfc1a134a9f857c1eff7bc9bdb4932d71a33. 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/QZGLS2369587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f7486a52efb00eae9d25f966bb385b1b4c67da496874139cf6cb75a167b5f5. 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/QZ5AB2371511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd99d279f53c3a425756e20c37159864e9348b5de288bdb00b00a1d3d4b2f60. 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/TCAGC2274204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c13de175db482a2180c108f7733013881107e9ec417e6786f9874b162dc1640. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZMEP2194371.
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 0xa575f58c56b481a747aadd8975a5ac50da430422ec4b5188ab150efcfcebcd4a. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZHN72184493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460628ad41ee557ecfea6976eeb5c295328a7913180b10ca8a4116d52d6d61e2. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZGLS2369586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ef2b9550d105c4221824684b503e10b904dcfc5669d0ba2013b774197d6e81. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZGLS2369589.