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 0x046070dd22c67dca882ba7468dc6b550a3be831bf313c52abc82cef0ea828bd8. 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/a616fdd7-d9ca-4878-b459-a59b7611c13f.json and https://artists.proofprofile.net/proofs/artist/a616fdd7-d9ca-4878-b459-a59b7611c13f.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 0x181c7c07a5160ff3f297c76562dba9b9331ff9df78e2cb775b49491bb266610c. 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/QZNWX2162751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699e03576b6c4993f9670c2886b89bbd45b7ef8fe2a93a5625d4f48f42ad4e55. 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/QZNWX2162752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d098557572ee9695aa094f5a41a055bbe2df78b8815d08de91674bbba0003a4. 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/QZNWX2162753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13af2108130afb39dab91531e7813790b7870b240c837be96a34598eb257b469. 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/QZNWX2162754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0000d27c9144ac02a6c1587c9e0caab18986f1674cd61e187d11c8e802c80055. 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/QZNWX2162755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab2b729bc588677f9b0370dd340f857e76495c2bfc3166dba4e63ebc52183b2. 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/QZNWX2162757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa52d0181e4fff80688664889f05e3f50255648449e882ebcd5bf933cc2fc60. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZNWX2162758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90d6bfeaf7093c1a31ff097904ce35456fb515f6e837c1b920b0c45b9e12274. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWX2162760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d51d0317c2f48bf405985df0b6cbb932727f3ba2b21a59f733bbd94c0fa3ef5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZMEM2206570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9176c6392c48340cb8db4de06d07cc52cded452fec939dcf83c76de4d2a91d6c. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTBA2287978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce4ea54ecf15204549eecbe898656cb21fe98a83a30ac8709c79f84e12da0f9. 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/QZES92461367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3cf931c16ae68a9d77557666928c40657182e98aa46d795792af369140bc43. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZES92461368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765f7f27ddab7ca44ae720e176e8344ec528f323746b1c4b1b33e62a5a1f829d. 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/QZES92461369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3139edc4e96b38c5610d85ce24699a1f33b333929fa35a5abe76666b4f1365ea. 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/QZNWQ2484954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c5e0978f876b5d4b4204a404bb7e6962e336f4a85522bf42e7c79003b2d094. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFE2433691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c740b254e9a3e5c215f8490ea29b742c8a29b248a7a076493173b2adc243075. 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/QZWFE2433694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e15bf33a0cc2ee0616b072e0c98e5e4cde62662aeb028c88e095a98f3c74fd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFE2433695.