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 0xdf6ca818c08a1f033a660fd8067d7be8f0053c8daded7e78b3b41e392dc974ec. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25feabde-9150-4109-b7e3-cfb5fea55893.json and https://artists.proofprofile.net/proofs/artist/25feabde-9150-4109-b7e3-cfb5fea55893.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 0x0e6d1190434bace0c47b46e451c53ce7c3b51dc1eae821ff807d103d475d03f3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QMPKX1844539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda401d4d1c6dc3df7d4217e03a16b507b3bc881f51b38fa47bbbcd3976d288bc. 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/QZES81912910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4549c5ecabe128908fd0748b899179e4fcbb6e90c5db06c86d1eb7a10a601422. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZFYY1926987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32deb06c34d647c8a809f3c103b7487a8de8e388591b75e339f9ce1c933adac3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZFYY1926988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a96fbe3d791f30408bc9b4305c60fec54d13e9f153c4345b95b9eac0f93e03. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZDA82023400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f83df1ceeb92ab0a1ec71fe0d319c041c9b5ca52516c31daa3c2a6ddedfb62. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZK6Q2088842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e9c7ac47b8407b7b9b4005ada30335812fe7ddab5bcf5975e123c804ee0f70. 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/QZK6Q2088846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d373cdc12c0a485757a69b33785654d0b6ad917da52be8856883d6c829acb1c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZK6Q2088847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7349c14ab50770a66bef05bb1ae8c6c62ec84ad795b91054f7e378b050e34cf2. 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/QZMER2021990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b5f741c00cbc6dface43c044e4c428ae9e1ec3230e9e52f5f015c3fb537885. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:07:23Z), 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/QZFYZ2180460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d67d3bbf9e7f2512173f7280c365902813981b0ca770d610dea8b5bd1a9683. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:47:23Z), 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/QZES62162349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48193f801b40a0b7dce483c9de37fd5e7c4e3a43f681225e7a2813fb81b79ba4. 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/QZHNA2136995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7338d96d500e58d8f83de8f162621aac6646f651c93287f24c7ac520aa7dd30. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZMEQ2134807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd013d0f4d6c1b16444eb9e6b0d2f5b4784159c89619a03cf3b001429f4c49056. 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/QZMER2148075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a247581dc31b7b6c42544e7e487dda28a0797d02c9d02bf7bc761b24403f91. 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/QZNWQ2128211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a11b866f67f7ebb833f899e94601da077d85b393b87fc16e888a52bdba3999b. 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/QZMER2148079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44899e267f7952604ad274eae749b97b6ceefa55bfdddc05a7953e8977e96aa4. 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/QZMER2148082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134c418151303408d6934d0150e3ff5b76d57d519a69a1ffa3121a0e3557d35a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:27:59Z), 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/QZMER2148083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4f0e230ee1f1a85860a8177eae43694aaab1afe0e3796b2c4dd7ee3af82018. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZMER2148085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bc8dcfd03c718b3e25888767253ff0751e9a2328e1ec1376aee81e0bac7e19. 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/QZES72210712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3938edd1be3ec2a3363b77e4870dded3151120ab09ef9d86f8f0226895001278. 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/QZTAZ2291575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b16e727bc7173c5a62d241e24c770249bb029deb4a4988321e839455cef7aa6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTB52203470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd33bb1daad072154124b5947b494c74673784af4db1a8f9665201ffcd8a64a1. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNWY2336836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9531c91e6297252ab84fab7cd39540c7417199fccaf6f2aa3d9287da95bdd24a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKQJK2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04183b1f9adc59422775a3b8fc48b6dac3de56b4c3a0668483ce89471b2dedcc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA41843605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39330e3a500edabfef463d8545ee2301b209bce7d1439f7f84a6f831bf497000. 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/GBLFP1887897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9254e1b5755e2e79b123ebb6a0c61bc5949042cc2d34f58d28ffa0cdae74915a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA52236084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02f246cecf12532c40a101285507a97994221a4605e7915a1bf63c960477379. 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/QZPLR2144885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e7441b95a665d5208782da21dc9738609d495b2c9d62df2a0f694ab7468eb5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLFP1915869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7ef14ded643fb0e7ed1ad38359ec11b78d6372d0a34234eaf45152c6b487e5. 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/UKW3Z2302359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b23c41caebd1e1bf4f248c0480df39a38dccd28cee764ff3071e1d4d6c4d4f. 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/QZHN42251277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22136e6690c8ba87193c7ef3e54956a61ada7cf57124160904d4f10345813854. 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/UKLMD1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8b313c497b18585461db45a221e5f58fcc5eb28b3c18cf72c7f62c5985902e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USACX2200784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9254e1b5755e2e79b123ebb6a0c61bc5949042cc2d34f58d28ffa0cdae74915a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA52236084.