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 0x5355e53f03f006092287214514ff2caf5b0ac1b1f36a2b0dd164ff6890c6d85f. 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/6e4b4607-3e34-4313-bb24-e26c9fdb0640.json and https://artists.proofprofile.net/proofs/artist/6e4b4607-3e34-4313-bb24-e26c9fdb0640.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 0xd1495d4f0bb20622d1ce0f09434908b3bc61cc7bd8b648720ea1522d9ccb0212. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:27Z), 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/QZDA61989175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa542d2eedc9ceb2a6c4958e4f8e8ad7ac3e0fe88270ea5cc2c6dec95aa1901ed. 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/QZFYX1929597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a18385d3b4f5c0e2d07ea73a3b0927774f1ff2727e15b6f6a6a9fa3cbb6491. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN51911790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce9eacb359dc27e986080f729179572acd5884efee697d4f55331326174e09e. 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/QZDA52081197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bbf84b0bba43e99f1f811d268aef6b52f5da43293b3817c4f1c34378b97ff4. 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/QZDA52081198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1455ff5d912833d623ebaf31ff0940f7998fdd96b228dd707e2e5a33cdca24b. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZDA52081199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc5bbe5ad896f10d250fba2e23ba6eb82038d057df8231ae02d39a01474a9e2. 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/QZK6K2035305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d6275244467cf545a322752738082856700f28cb9c278912246b94146ac2d7. 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/QZK6K2035306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e01c8e8c95ed92aa03a63c06bd0aa0550b299714a147cdfee55ca14a0f37cf5. 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/QZK6K2035307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb91ef1034db89edcf25f4fd812d9d92cddec57cbcfbd8898599d960a8120954. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN92158896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eb7cb6e61547930201bcc9bb2e3cc7aea63ccf2ad503139986aa85fe5f54a7. 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/QZHN92158897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571f89cb3dfa3515f8becefec728ffed6aa98d6442e1d3e7efe1f780796bf234. 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/QZHN92158898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca4bfd50bacaf9683f347a0046d4f3e0b2270a322609aba7cd535323c592f79. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZHN92158899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68225e0985b8165bc6566a47a9625e128bb8b1c440154997ce90d76c02a6ac23. 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/QZHN92158901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cde5b8ef19f41a044f24c6191d8432a7f6c434aa43370a4a27f7fbe8f5789eb. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN92158902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ef8550592f1bfa0c54a2e15ae0c640ab0f1351e2da21efd83d0c6bfa4591d5. 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/QZHN92158903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa949ffe06bf27bb9a386870b4477fbbe483fe472fb6a10d82079ce6d8c5b4360. 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/QZHN92158904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba74cff05101982398d3020f7af9f465c00d69d4a6bd90717cb1672d202adc3. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZK6F2140243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8ae7222a4695df403a6f6201c6dc5360b69e77f2b059266b60d122482a9c97. 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/GXHND2501568.