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 0xd2d6594a254dd0cbdf6044baddd0b1c66d0d8a2c086c705ba17989649fc08ddc. 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/ee133088-b22e-4fec-b5c3-76ed9a6d6bac.json and https://artists.proofprofile.net/proofs/artist/ee133088-b22e-4fec-b5c3-76ed9a6d6bac.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 0x9e518483f794ea88bbde2956bd66448b7335ee550adaad84dec49be2278bbc5e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTAS2190715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bd0f9e2b91826feb90d1c2cfb3ac500f43ad2e9138a3f4a0f6eb077f764e74. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:53Z), 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/QZDA42365360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5670d1e98a9d875be5a5d7e1fd956ea13a0b3e9876802135a9fcd85cf82f43. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QZDA42365361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fd94370928e1a72b834a5edd5274ae630283ce028b76e9bec225135f1acb64. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA52357246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc742ad00d34bba8096542f3f9005d3efd73652e4ba804b95c16c2e7000030ac. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:33:53Z), 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/QZDA42365362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f47b192579f38118dad3337c61673a337a5a048fd5a2ecf90f5d168cb7a8a0. 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/QZK6P2382878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61f0b0a95981e005e87907c95d76cbbabd3290d4d5b66b2171f898da43da361. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZK6P2382879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bbded978783ed2cd34b38b14beafe8988926d5d5928318a1b8680559222a49. 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/QZK6P2382881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf179e9e26910681d4eaf95d45aa4b7c68a7e24878b63f6c1b1125ba23407086a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6P2382882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e66775c5b6067a35df53433872cd4a7588905ceaa76a9a0a6f8d1153de8c619. 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/QZK6P2382883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621f4bcb36e667f55941782758b9d42618592f9444d1b0cb3f8ddcbd96efc239. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6P2382884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3825ce37461d1ee80e08e48397e782bb4f37a725893a4e5c3573e5c832a413ba. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFL2341228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97148bc56cb8fc3892ed9735fecb0fe88dedddfcc8d19f836218d643d0575faf. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:54:40Z), 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/QZES62458570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55552c39093d2cf399df17f47c2834503d359efcb0aa81bff789d79a0f62cbd. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZES62458571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdcb85ea772c96b53bee035aeed9c0f20e08bc0a47118936a6b10cebd209f91. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZES62458573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999eee7e1d7796df7de2ee8f6eab412de7c36e6f54fdb276b8590f5ec34ac368. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES62458575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b39a8b238ca90f913bbb6d46ffdf9cf7198557d16719879236518ed0b6b49d6. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:35:24Z), 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/QZES62458576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986428d11de4f11e402300f6c3fdc60e0e42fe4baf4d4d98345a3723e1064be1. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZWFP2452105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb283f8ee4fb369c44fa4b3b9ceb0aa809a36c7defe160ade77aebcff28581e9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ782470694.