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 0x0dc307b7d526cd68a0d1692175760e9f99761b992dfb0e15709f92119b855dac. 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/3e481c27-0719-42db-a7f4-b7fa5ef785b9.json and https://artists.proofprofile.net/proofs/artist/3e481c27-0719-42db-a7f4-b7fa5ef785b9.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 0x12d7e3ff27e2c0f1b650980f2df7048c1842967a6b39de0a3fb597a7dfcfbbd5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA72362075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642bfec1ff396a7df52a8e53b5768021a9f91dc538cb53b46134d582f03e63dc. 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/QZDA72362076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cceb711f792d22fba7e8d49d20b8030f47e624f1c0f9d8cf1311ba5165e270d. 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/QZDA72362077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4703d9d591a70554fc0f76ecf5d891b7db3653e0d0a6cb7538902a013110b5. 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/QZDA72362078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f6678311d6621b61a5112a16778985b58ba42034dc46d36b2c371a7290b48d. 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/QZDA72362079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562bcac6f64893644de056ba9e58fa7644e16836508c7c858f5b8b6811378222. 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/QZDA72362080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835623715815603b3403d12af669075c98057ba668b5a8f1bd49e319adf077bf. 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/QZDA72362081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3c664974cd4c38e25f152a11a3a5d75dfc2e190549eeb042bd66f7c4eef850. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:47Z), 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/QZNWT2338466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda97b572e492edf00597dd6246867f7d59e71bd4b1ff9611c7aa413ccebb73f4. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZNWT2338467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182c3def541b3f5029dd1af729f52ae5d0b87563a9b5f6023783bf18351775bc. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNWT2338468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ab83b61c24abed735541f0909e7eb307a900fe6535b4ef50731121dd49d881. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWT2338469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379b060182f37147416659c14d3325f357fed64bd2d199d1ccae1c8f7cdfc7ba. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNWT2338471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccc6b6ce6c92cec7412dfc95bc0b875aa909e9d62dc62f2f40cd561803102d3. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:30:16Z), 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/QZNWT2338473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a9e842a02f10ef67bdce5676ba1d3ed9fef852f3dd80742358a53971debd1b. 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/QZNWT2338474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efa817306c6053553794a8650a6ec6579796df2a1d342d4c97f45b08aa915c0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTB22325265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf6f292cfc39a97aeb82bdcf89395d50e86f0b9482a28a0401253d95382f45a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHNA2477784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d95a321cfab4576bbd173ac63f49855e0584191fd3f2bde2e0e0be70be224a7. 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/QZHNA2477787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595c25bd62b79a41174c5e9718e70d1db5aa8dc3567499e3a842dc7c68f3f598. 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/QZHNA2477788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc595a43a16ecdb436be8f2ae708e62fd2f4df8d9f0bb50b64a981c03f5a11d08. 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/QZK6F2446899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b125713a425036df91c0febef148fe47849214faeaa5c7a46d8a73336b8af8. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZTAT2494330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d373135742bb75c0fedebd97241c00852ac41bd1c77ff67156618233b6f0b7. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZTAT2494338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce8d3d55d0e031bbab6254ffa064b9100ba9d61652efc39d532d30ccae20ee1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAT2494341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6943cc4019c48c67654b4834789ef79ed340f156c831c27135a3342cea19a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAT2494343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4dd7ab0f98d86d24b8fe93e1d54065bf7adfb01fd915d096aeba49f5ddeffe. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6G2582991.