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 0xcd6e72dd45ba925da2e11ae9eb82030dcebc8197543098eeb899936f0deadcc1. 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/e167fdf1-5450-42b7-bc09-c498d00b0c22.json and https://artists.proofprofile.net/proofs/artist/e167fdf1-5450-42b7-bc09-c498d00b0c22.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 0x6523fa2f6e5b3358fe1e20d1094fff2dd030c325a5c11d922ab98f1f1508c60e. 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/NLRD52013358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c360ad666379de7f87c2d97abe5f88a7ad3572a8fc37b59c200d008b3a69ef. 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/NLRD52013400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f49f03d288c25911bfeb41d8c513661d979634dc191ed549d4ca6f54d22145. 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/NLRD52013412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e7149361db2ba3614c9f73dbda7f758dd48e35b1831406330ff823b92bd79a. 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/TNA0E2100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc706b61eba8732af6a1f9b14f08c209f5ffb3f625029061454890e859d3418a3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:28Z), 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/TNA0E2100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d142977af7f0b8aa6031c699c1d43a39b58e9cd45fe8cb2eb6b553726fb6a0a. 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/TNA0E2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f7bdf1edf2daa1ec1be759c29ae8d24db83b76bc14b251728a4000f0c5186a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TNA0E2200859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37ca47f80f7f8b3d949d4d06f1065b986693bfcc4afe5f9c430afb6b75b2b16. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/TNA0E2300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c222f5141487cf02f2cd7b6aff7097825de71a088ad05a7872e5a178c41907b. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:57:37Z), 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/TNA0E2400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd869f29e08bf3204e1401dac7aaa0cc92747525fdda95012ef872dc0e5d3bb0c. 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/TNA0E2400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bc6ae5c9776a1f7529ba82c591929fbd5ec3bb9d2ee56170f8777c24e680e4. 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/TNA0E2400257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90687aa4a42767ec81b8735c8c66275fbc4bd0062b0488e5240d2d54e421ea0a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TNA0E2400298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a18de136ec034cde679a05793b84b07b671c550806788805bb51cba016d9ba. 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/TNA0E2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0052783ff9db9b35df3f05f25ce61c2b75b7727e94e6e361b8b23d5d5a12698. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TNA0E2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f23d440c68be11a74ffae0490c9fa26151f7403da9715e8413fa06859f3895. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:28Z), 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/TNA0E2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5d7924c719cc4f373157ebb3b03222408bc723865bb57f23f17ed823d18529. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:01Z), 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/TNA0E2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286c1438c18bd7d5a95830659f7808bcaff1452c77286d42c48c8b50fb95ba62. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TNA0E2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9ef9d776f445d9b58873e7830b27e2202c585234fed41f38656cefa37b1d9c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TNA0E2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc25ff957aea6310249ebe751645aaaf5657854534cadbaafd35f88579d187a. 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/TNA0E2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e193d9a22fa234e007ab3cadd71c5d29c0fbd264a1b4f2c9306823b8dd3015. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TNA0E2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2851e1d2107f272f28b3a27b1344568857d4a25dec2db48ba6cba743340130b1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:36:25Z), 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/TNA0E2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f37735fdbf39e6c6a84d54885eeae015d503dd82401ae36330dd3f762019b4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TNA0E2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2054b1e982deb408354baa3fdb6fe7d6909dd29078e11d466793cd0b42e0b9e. 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/TNA0E2500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34900edea51911661337452f98612c37b42c5df1ca7e0cdbfa2127513845fe54. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TNA0E2500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95cb2edbd2c0b97a40d8f6172cc34b955731da0c91028acf47ab89c83c6ba09. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TNA0E2500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf15dc42efb2e8c386a0fc3bc1be636e95bafefe23f8b7c17481af4039b6d382. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TNA0E2500097.