right|thumb|Door with two locks, one in the doorknob and a separate deadbolt A deadbolt or deadlock is a type of lock morticed into a wooden door where a bolt is thrown into the door frame, using a ke
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 0x55f3c3e4b049585b7ee5dcc9b2a476d83c34f354951d9fae65f69730ac920e4a. 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/ec4fdb40-62e4-432d-9618-e2dc15dfef5f.json and https://artists.proofprofile.net/proofs/artist/ec4fdb40-62e4-432d-9618-e2dc15dfef5f.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 0xd9a5419fad0cc96fdd7a9f7a32b08432d7c2921438e892f60be094532b67f49b. 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/USHM82223246.
Live at the Wild at Heart Berlin (21st Nov. 2009)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8793cf855f751dcca053d30bb23669a09341dc694fac2f4149a0456278f926. 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/DEHC71022207.
Live at the Wild at Heart Berlin, 21st Nov. 2009
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd80d500953fe0bc5d8268b2c68093824df2da2f7aa4ed2d402f64391a1edc28. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USL4Q2151297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c840bf93e61838e4f18be0382044b3863d35f407d78a5263e5ee298d4fb44e6. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USL4Q2151302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d22dd38575802c1a326650388263c9366530588163d9618a3ab6266569fee4. 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/USL4Q2151303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42b1648f9e34e067b85ce253e3c08fb9953c0ecab7362e85c939300cf949083. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USL4Q2151304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca071298fc262951077d46558302cd7adbfcd73e34343de4bdd1f0e665d18315. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:57:37Z), 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/QZ6ZR1700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8145f0451ba7c300e66da917a3e58a897bc17fbffa2653a89e828544ea282f58. 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/QZ6ZR1700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c2db06bada6bd36ed6547df97943f8f4ff6ba7439c6b0acab9f9cacf7b3a23. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZ6ZR1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee74630f01d297a2d038e7cd72a806229d6ef421282632001b01321fbd18e46. 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/QZ6ZR1700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9158c5e36fdb83296d0ec2abc8d88c499256f1afc06bacc23fae2236939cfaf8. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZ6ZR1700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f31a42df3a9e75eea01fa918e5d3ece9bcabfe8c1d72194dbebe7763ec941b5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:08:39Z), 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/QZ6ZR1900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7beade5f308f389f2cbcebcaae2bddfe18be9a9e22242167633a8ad2e8cb66b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZ6ZR1900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe81ff11da1a6548886a582d3bed9a00f314c9520491cb7832b9e269bb834dc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ6ZR1900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b6b827726ba35a810a5702ed4df749fa687037299a23bea256f34821266d65. 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/QZ6ZR1700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c8c7b6c7a283904f8ae519924a4c857f3c4df54a0bc88e1aa60e02a31ef0d0. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZ6ZR1700044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f00d77dd8ec76b767652f4fc43697f1606c068395d19499ccd5d155533f47d2. 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/QZ6ZR1700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffc8be090af616323ad06e5eee3eed443f03b32efc7df5f171831000872a0a5. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:26:39Z), 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/QZ6ZR1700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf4b8e8d8468dc9cdeebc728bc77880cb4137ab95ccb7fd3d74da5402ef045b. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:47:56Z), 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/QZ6ZR1700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b5b874e2a3a633d36c1fb2e301936f2981ba764afd22b099b37cee307d06ce. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZ6ZR1700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5589a51e832bc2759578ccd8507bedf6ba76fbbec9539e44025859d9b9caff. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZ6ZR2000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8f4b28f8dce1c77df1991be7f2ece8e0c9b242c97c2398b8b8595c54c8d93a. 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/QZ6ZR2000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae346e19fc6e47886bf28dcf3354315471ac378c53255674406c8077691418b. 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/QZ6ZR2000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02829009c440f7784899ed71130cdef0ce663ba95ff6e72b064db52100ce73ea. 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/QZ6ZR2100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14faa3b1158e4e4dc03f3eb44626706f5d5f600cd5ba232ae7edf1674536739f. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:39:42Z), 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/QZ6ZR2100119.