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 0x9d95cfb674f82006cbff7c40cb8c4777a86e878a26cac823dcce86b3cd3c09cf. 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/4ab589a7-271a-4de6-9eda-ea72fe1b71ee.json and https://artists.proofprofile.net/proofs/artist/4ab589a7-271a-4de6-9eda-ea72fe1b71ee.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 0xfc5a6ee95aa9cb9ff1d3b55d92b120df4a6151be6e3f70dcf09cb2b8f4d5a485. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBKQU1304278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1d294b89341e887e94c31f4454a394362dca4a31a8c5e11017cc51f9efabfa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:39Z), 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/CH3131600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ff4356713bcf5d3100e3073bb2f1a7834c1c19f47fd1ed27e1befd8cb92d8e. 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/CH3131600274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb87e904162d60b13217ed1a199989b952cd2b757a890bb07b0dec5fb950cf00. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH3131800259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd324be846cdbd3f47238352d78704f19a53961c8d9a7e6fb9719d8cd3528ac95. 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/GBLV61816391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33985672d8a059a378f2458b6d26ef8cb12a653f65aae50705d09b598df721c8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:37:38Z), 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/CH3131900370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb263902f4cc0410f24d3473613ad16cde36c42ad18fb7e69678c34d9b1137d. 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/BGA472004241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ead7b4cb9720139cd7acbc018d02c89ac935869faa6acba2e351fd087ffb48. 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/CH3132000296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e49a4465275066b2ae250cc601113cd120d72b939529f884926e6691f8b4c7e. 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/IL1012000512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7b7d427df282dbdf464ed108b80ec31e65ac9a7a90c27e8f4c12c1f6d46e9f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/BGA472217625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c901d1d0c4e842b4822ed6204b5b53832a83cad21a4c3985df7762b6a4f4a8. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:01:53Z), 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/CH3132100644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ad25da244ca371a3e2a07a5931c529098fdcae0a33c8237e47335d83b58298. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:58Z), 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/BGA472330346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f71d410063c20c6a4a2fbbeceaf5e61ddfc4eb957e31e44376174d2e41efd4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:41Z), 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/IL1012402047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e00234fdea253a93272339d2393715425c8ddd01201805d67a211a23d78909. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:26:23Z), 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/IL1012402048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b59185f09c8ceb5c63861fa5421f475cb7a363bd9ed9bbaf4459c2ef7fdc8e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:43:02Z), 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/IL1012500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1328eb40949cb946e4bbed8b6f77f50fc72b34830486a299efd7e68ff829ca8e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/IL1012500464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad286d750444a8364b10c9e9cdbfe9a09f78038900401a49e6e5f29d36c59351. 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/IL1012501128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e96713913f88f96494f315119df3d8ac4f49fc062de6df0a5003b00c0ecdcd. 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/BGA471602728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b6f75c54d3af562b9d05c622bb4d43f74762a37ff0f22954df1197bc705178. 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/DEKC42300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe262e6db30cc9235739aa0abec165894bfe6a2f4d0edc8e09274f815b337faf1. 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/IL7532313073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced394c04c9b241a966262322c1a79c6a9bccb48bbcf986ed3a7cadb3c6907db. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BGA471602727.
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