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 0xfcaea404e16e77b62822690c6da76d42f5bbc0cbe1d91c98942f329290dc3f69. 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/2f1a0539-0e9d-47c2-90e9-6e61cf0f4991.json and https://artists.proofprofile.net/proofs/artist/2f1a0539-0e9d-47c2-90e9-6e61cf0f4991.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 0x9a2d021caf019b9b2eb0462580a527a0ef79dde30a3829819c69a03432be9334. 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/FR59R1937990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0b527ecc8be6770d65e82a48a5936c67a07ce92328795f25609df2edee7e53. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QM6MZ2091110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0d802ea20324a1264ec913951aa51889dbf61579914fe86684bde3ff337fb1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR2X42116997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69c8325ee7ecbf6f41c0a6b3225ad294ed98cb53529b378cca65a45251c0339. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR2X42116998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672de2d78fe24dc95cdec41f046d93edeca0adf9d76ead7762125f6bdc4e24d9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR2X42116999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900625f3146296c383f24879a878dbef27a8ecf407271a493ddb020c5b088cd8. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/FR2X42117000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaddf529ea905071cb14e9835c3a388b5029dcc0e58eaaee9d7ae27ca739945c. 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/FR2X42117003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1e8df8ad4ff4e3c933315b400c6e62385ecaace1bff76f4189e208163dca75. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX282177611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d067db244497c42f6066c5a7256356742f97633fd7f2456db5b24f92348c2d1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAGR2261273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96593fd61ebf5a97df6e2efe0256243959137c933c428fe311c69215b3b9950e. 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/DGA0L2323000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ad4312b252e0647e0e1234df27aaf634516919582429b157a372d8dde8b714. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:00:20Z), 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/TCAHO2387418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefad663f3462a252c2f47acfdb878cf90140d7fc5d62fdf21a403dc341cd0f65. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0Q2388269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159ec04d9bbee09d084ae693877bfd3a5fb1dd2f64a88e8e397f1dce277eee8d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHY2449735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b49480eff0e5078777bb381ca0e29cc0cca8be980cfbc9938f0b2a129b9279. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAIR2402829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d63432fb8e824b293ec8b18a398014bc7c32afb310acd2db4d57d47027daee. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0Q2436943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60496a2bdd384d4efba8663fda39a11a5ca9f5eddb2350c03cf46192d5f74f55. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:25:11Z), 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/TCAJB2499961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524c2ecb54f3e430d035dc775472664f55e388e12a988120755dcc4a957b19a7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZGLS2516395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62194866b47f63cf86af9ee814dbb7f3191a402b6f630c8ca25c8df6b1352489. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJY2523729.