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 0x1f3ea07aee507c7a24c4ce18f832bcbf8e979c939e7facbabf44c2898867a064. 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/db08016e-0b38-41a3-92cd-8ec7147e99fb.json and https://artists.proofprofile.net/proofs/artist/db08016e-0b38-41a3-92cd-8ec7147e99fb.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 0xc1a997a9ed2805b2ed45f659aad8efebe6f1954eea5bd00b48aae1117080c678. 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/QM4TW2011573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345b0a6a21f9935b813551a4566c71fd9325f1fd5b3688bb08f23f0aa89cb912. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TW2011575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8378ca3438e988debe7b59b15f8a90a17989536ce78c13cf766cf9290f644c4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM4TW2011576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1679a4bf134bc3630caac80c66d2c8a173928e2fdc3835a4b3ac7b974af34781. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:19Z), 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/QMBZ92092439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad72df3b08f01034f0c3754f4cadf23d41ae64939078429ed084cde39917f298. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QMBZ92092440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fff1bc61230b95bf1145cadc82fc22b7ae83d6bd36d0e02e268f012f1d8329. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:07:19Z), 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/QZFZ42344191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deab738fa511530f4676a5e8730772a10ae9d7757218a52403ea11d7c62f7fb. 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/QZFZ42344192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc15b720d2677d6728083bad851b4fda61127644aa748b8be68f804fd304db53. 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/QZFZ42344193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573734dbfa4d1c7003842df0e3381b6d725f4a8281a8b67d7658e749f2fecc8f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZFZ42344194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41cb09b1ad75488bb2dfdaffb7721b304d9b401ac80eb0b32c66749d08956b9. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZTBA2476309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aed32ebccabd432057269023d43234f964c13a15e643c7b715c1915d9b5ffbc. 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/QZTBB2409329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d538dc365b49f23ef07ed79b18ce5d6e4044958819660b93c552280692f6a3. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTBB2409330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceab82dacd4d72d038888a3116c344181152911456927bd717cadb45a4dd5981. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:19:04Z), 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/QZTBB2409331.