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 0xc46f9d75fe3e53431d9170228d7575b4da87c9c0b9fa408a187d93a4ab12b908. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/436a8bb4-1d7d-428e-b4f4-21e45097fd12.json and https://artists.proofprofile.net/proofs/artist/436a8bb4-1d7d-428e-b4f4-21e45097fd12.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 0x6152af898b515f47400efc0cfd2cf03ee41413645c662e845f62b7e93a4ad30b. 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/QZHN71938127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a02d71932e64dcea055fa49f8ce4daa0ff86710120b37f18134c544f67dc96. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZHN71940912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb3cfeace8ae18f7b818f1f0b621530b6debe9f29f4b7af5cd042fa7e02e4be. 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/QZHN71981096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99951444f60e86b2bd55da28902649d78df20d231949df5390a2d2343ce9b35. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZHNC1927939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d29868073fe2c7fa14b2807fa3e79ef1840eefff9b79200fd4368d345029ad. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZHNC1927940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2b389828b4f95b73ef5b5bd035b69bb52030b6bcdddf057362a7e8480abc6b. 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/QZHNC1927941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5622f6a5dd78f2f9376fb56fd5defca343cbf078acbf2a7d9828b5442cacf6f2. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZHNC1927942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb683a4030b205de34c545f41e85a1e06c8c0b3781f4e21dedeb35644318523f3. 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/QZFYZ2074277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9461096368a4eff6cc490fa6809eb99bb72abf11cfe89ee6990e34f7b8c6dbfb. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZDA82099908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81342892a80b9a5c623f34ffe7850f71401ddee9ec67e37b28dbe6f420617d50. 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/QZDA82099909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1172e307a1634cabe7e8218e589cb24d62f219cefa26a0cdbdaa2e56e13b2ae. 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/QZDA82099910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af784eb1a40eb61c710d3640237c9c297bb59a93cac824ec0cf1b8adb498d84. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:27:07Z), 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/QZDA82099912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d215002c39decf018948ab11299c8d5ef22f762ea32027acdc26759cceb15d. 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/QZHN72033097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3242a6703aab6eb3fba324b70137fd1489fe39bf4b619ce43c1a9285e4f983b1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZK6F2038181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ebb0a6e90fbcd7649b6acb415bd1dfa89d3fad9ccbbbb893c1343cc65947ec. 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/QZK6F2038182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f724de1a412ffccfa792369f1f459cf36152415cc8862ef8a5cb93130841315. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZK6F2038183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3ee7ecc95d391d1ee136c61820d5b9f309510850a4e214a37a817594ea35ec. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZMEM2178965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ae5394f057c12ab0f956ea1b15de83d13c3a68e69923227d353b95aa8becde. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:59:09Z), 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/QZMEM2178967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1041e63e185e8ceedbd87b5d3f9940e58395094c111e8206df40f6180c94150. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEM2178972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfb067567e8afde26eaff64910993fe3c39b0e764e626e4744b0aa4635b4263. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZTBA2444939.