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 0xdc0aca19f756e2422d915fc636ef43124f98def87b46fc950c4cd424d94cdaa5. 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/a537f37e-5a35-45f9-a632-8947e182fa9f.json and https://artists.proofprofile.net/proofs/artist/a537f37e-5a35-45f9-a632-8947e182fa9f.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 0x0c501dfd115e9d389f0bbbc223bb33f55585aad3acccb9e2810de88de1571eaa. 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/USJ3V1337935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7926c11a330f0e9019e0d4918ec50bac5d006496a57709e1b39ba31263b948c0. 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/USJ3V1337936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5184b812ef335feb786aa355c50568a252ff4aa9c56935bedc4f5c9cd7615cfd. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:37:08Z), 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/USJ3V1346939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5648d9901d2cf2cff29e3c645bc38c8c783fcfb93d3ea065b1c5cc397f4437c. 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/USJ3V1381259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbc4220b829c71e252f57b9ab8c9d5038825c01f5c12c627423b742d4d553f6. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USJ3V1395542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c3945492f49c9ffe25dedf82eed1c3f161444c28225ca8d9d4eb12510dc6bc. 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/USJ3V1434421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79d68db4821bb3c1b279c90dc32b77847c7d9c75169fbee41410a9c294a0488. 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/USJ3V1434422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16c99a9961f2485c9a44e0e00f67a26a9ed0ace5f0a4a0a0a816783886cf752. 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/USJ3V1450064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa7e513de59158de1bc264bc72dd7691da4044119576740ec5da2c5207be49e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USJ3V1461701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b2e0ff7c8caf6fc44eef19584513b90f1af5f997674ac2fb0aef54641a4a8f. 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/USJ3V1461702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20e9fab487f1db944895d59800b78e44befab16ef54623e17b2c43553069da6. Chain 2 (Bitcoin): anchored in block 957827 (2026-07-13T08:59:54Z), 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/USJ3V1477223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65dffc22c34c354129bdb9137bd0ad9c5140d651d018539c5794724af9f5d1c. 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/USJ3V1490208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf140d85ec5656ef7e465b2096c10185a2318d67127df0e52c0af276d812b5f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USJ3V1805241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9627b15854d48f4a67ffd9017c976cf04663f748aee6286f95dc99976b3a94. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USJ3V1816606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460b8bf6c86eecc1924d3ec1e66fa93a4d7713eb85a33b27f795199b43d66010. 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/USJ3V1817832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfa6b4b1ab772d16b706ca7ee411b8b7b263a8e1a87d9119e51bd2844047984. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/USJ3V1817837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a1eeb407fc268fed0802d280eff239c50b7fe9602b5b101c8a95d5f9da00e8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USJ3V1836861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f1b0869555641a84c27562eed2036b0485253a62e2b8c6d47a0e6d076c7f19. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USJ3V1843515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42d1947b25d6b44d0d5ef9dc13909e60f87ee7cbdac23c74d5b692a89ca6c74. 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/USQX92003791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42d1947b25d6b44d0d5ef9dc13909e60f87ee7cbdac23c74d5b692a89ca6c74. 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/USQX92003791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2b952ef0b3355e49f396b86df786935d99860f404045cd6794f0ce2937d55a. 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/USQX92100656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0cbd05a513f947265499801fd8f5404b4c1ad812a383168dadc79b6db2b7e0. 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/USQX92100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8b43f691e7b6aa716024019c3525a504d125ba4fa493fad4a627bb1156ed68. 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/USQX92101313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b4a7eeadf329a8688fe00a99397d927e2fa6b4ce4f6f36482b592711487a99. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USQX92101315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c609b425d9b372a57151de725e83619ccf87624faf8499fb36378b7d077ef5f. 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/USQX92101314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab3b73f9f2068fa4510a51402725c266031375fd4be6cfad0c892dd3c186eea. 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/USQX92101316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62748253926803b71ec1fa8889d582e622ed2f05b76d3f49df9318a344603b87. 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/USQX92101317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2b952ef0b3355e49f396b86df786935d99860f404045cd6794f0ce2937d55a. 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/USQX92100656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c609b425d9b372a57151de725e83619ccf87624faf8499fb36378b7d077ef5f. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USQX92101314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab3b73f9f2068fa4510a51402725c266031375fd4be6cfad0c892dd3c186eea. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USQX92101316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120fbabb8e779c5c0ec8ef1b516dbff5b87d370d566788133a6386ecb005cba7. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/USA5W2200166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a21adaabf9ce666b88ffceaf08407f137c9727bb258d09168bee7b61147dcfa. 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/QMRSZ2101148.