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 0x2d5cfd9b7e812edcb0ed58bab016b7ea2974d8d4aa697b3ac9a81e9e9afad97f. 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/b1f7abbc-23f9-4a6b-a0bf-84f7cc30aaf4.json and https://artists.proofprofile.net/proofs/artist/b1f7abbc-23f9-4a6b-a0bf-84f7cc30aaf4.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 0x6b378b894347383a1f5fda04e601ce39f3b72988989253f1752cb93245cf4cb0. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T20:31:58Z), 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/QM6MZ1946763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc13ee062e803ace8e8bcac7cbf3ede6c5f3824e6bac89d2ae91e1fb364bafd2. 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/QM6P41995993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6e41b0fe77b03fedd7cc149f61c4d21e31e8383c7ecff12e5ff5747b4b7db5. 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/QM4TW2077576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c81054fb7b54130e8abc24bf876240f6f6f0906a357656e914260e93a0d1fc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ91957403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cfd387acf64d7b00644eba8f2707a8d22066e7375345bbd3cd7795388978a2. 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/QM7281973083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a420b5ef471d6e49f5c8902768915d42588f8723c6c373d327d709f079d037a. 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/QM4TX2030345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43be3255f4935214e0af46f64c609834a8bbe6d2fe9ba799f1bc8d0faee00206. 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/QMFME1920736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8960051cc3aa0d1017c9dda2d39641c931ef58c3c76026fea41898103961d7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:27:08Z), 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/QM6MZ2019170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bad6e7502d209dd1dd38f03d730ee22d967df6b4c2ef57f3c5ec27c7d7e9ec. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/ES71G2119353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e2ef67910ba461a34e7165d585a879a8b9300e1625516795a838799e16b793. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:55:01Z), 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/QZN882216759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fca3153988610d58da0da00ee2020996ecdfdddfdb8d286104605e0c306611. 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/QZN882250809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dbc325a3673bae3c97cd8b064c20c2c408879f08e23465484eb77e4ca4514f. 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/ES89E2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125d90d329022eed78a96c49563dd7e9c8923165d1f10a0faa7c998f9808501b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES89E2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125d90d329022eed78a96c49563dd7e9c8923165d1f10a0faa7c998f9808501b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ES89E2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dbc325a3673bae3c97cd8b064c20c2c408879f08e23465484eb77e4ca4514f. 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/ES89E2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fca3153988610d58da0da00ee2020996ecdfdddfdb8d286104605e0c306611. 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/QZN882250809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b75edfa18906035bd7efc792b8502776adecca32eda429bd893c4c1bfef4143. 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/QZN882157538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c402e722316ff8865b76a099989c3b981d22b32c3700caea64a5dd03edc890. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZW9K2395662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0d883517783a15c4238cd37970276f10da019cf44f4738d5fdf60e9bbd4b96. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZW9L2327986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fd31efcd8b57594747bb7ad44b49835f9bb968e22eb740e8191fcfaec72520. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZMZ92517521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaf7a50091565acac390dbce84d36e71dd72d03bb2f6ab5c483fee9afae0fb6. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/ES64E2507282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4098a6ba474c6d0e5e97b6a8a0e69b284ea222dec33ffdbd92656bc51a15dc93. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNJX2570810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731d07e279fdc764de197bc4a233c7236bedfc880ea8312efcfad44cf3fb11a3. 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/QZNJY2552112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd3b9800269c39899e6e6640537c3cc6020e926f401f0f7e88804a4e0327839. 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/ES6172323123.