thumb|Invasion of Attila the Hun in Gaul (451) __NOTOC__ Year 451 (CDLI) was a common year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Marcian
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 0xad7447c964e5118f95eedb17b4a493c1b9acaab9a6089ecc8decd28af4f5c487. 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/b6d1cfc7-98b8-45c9-a012-9ecf88c80bdf.json and https://artists.proofprofile.net/proofs/artist/b6d1cfc7-98b8-45c9-a012-9ecf88c80bdf.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 0x1c9fe9797ea84766214639ea9c910f2687fec1cd93169905f09106789be83e21. 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/TCADX1840983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298aa7b66f3bc4463b9519b41511e01ac6d95138b1763fcbf8b98a2e9e10f6da. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCADX1840985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a0ca7ad0f9c5f68d83076961eb11327eb515fe6e5bbf68f27c0b3975a615ed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADX1840992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573617d7a48dc0131e60d7aa858f8363570c8de3cf4b9645a196339b20dc4f07. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCADX1840993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a90bc19e4742cc6c5387581f7137b922df9337319720349e2fcf0a155e8a38. 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/QZL382011720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5023c34b73451f8bd08c3a57133ad43f8978cceb95f9565357173cd32a013e83. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMEP2072972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9881b208af02ad7ecc114ae82cc437c3fb750fa375dd2f51873f17dbe17bcd. 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/QZDA62132192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd0b24f9158f8ed21b1e9231eec57e54dd02989c9f437b2691c938e22955a76. 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/QZDA62132194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc38704386b4a94e56b0a39b7ced62cb8b095a8f74f58a327a188d278e44dd7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZDA62132195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ad582de1504ecd1561829d2b8860a4f140d615bccc869d5179b8a7a5671aad. 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/QZMEP2072969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efe643ddd432ea6091a206aa8d517a347c318de5812a96417b3838a04f32f5e. 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/QZDA62132196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc181f24a4e691d266d4f8b97fe26ff1eed38564bd19934dbe2f2a7298afd0b. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZDA62132197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bef7f5a1a007146af9e338df1a086294ede3ffeb31b6998e113386cc045b26. 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/QZDA62132198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39381ac34207159382cd47628a2f2b8880306790d7c667aa9ccbd5e76d5f00e2. 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/QZHNA2147786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3a5cefb5fb0539fe475cd9a8a8372807503a464aa2f4f4c2e3b961cf964d83. 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/QZDA62285029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2e55ee3139f13455d68084e43b39d4c6ccaa3d16296fe3005db7cfc9ece9e1. 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/QZDA62285035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c12710260f9c782bc426d6e3d850aa0f7ef4c064d9dc2911cd2807b2887629. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:30:27Z), 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/QZDA62285030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4503f5f63276c4d4f5e07d58bcfe997ee3f7397a60204aba5d846a5482cba740. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZDA62285034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2004b5960f76232301018511b5c4cae13313ccd88bd0b234e9b068b0d9767fbd. 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/QZDA62285036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf5e7125ce45c5ae5e6411f7d831daf8e45c924300db868af7181dd7bb1b254. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDA62285037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e20ddb5f13df2168a1a0a26682fc8e8067727210e45d9d0d49021cfc1a1196e. 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/QZDA62285038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecedcfc686b0dfdca3471d2ceb8dc6f0a833bda57c985edc90bbd90b8e1b752a. 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/QZNWY2237791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf343e3afe258968f77245db45546721c24e232909f38e0d30304e04c4cbbb71b. 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/QZTB32209256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a7912fcd1ced8f9df9de2c49199513700710bd0022a20ba3a7577fad6d695f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB32209257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b81092569cdbd5094426d95f8a1dbddee6c17028430074813798ab88044a0be. 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/QZTB72299595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cad4f993e8191507eae3fb86cf058d509276d69679661237464fb979cd5401. 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/QZS672427451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93996c4bd909f1ab8ed1c24fd3d5148e49b7e4a9fb0f3b7132dc56b495289a7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZS652430463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc4bbc27043c073c4bac77dd7ba3651d1cf4abe12abb556204587ea64e7e8e4. 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/QZMHK2444067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b0605a5fb90eabc907c59448acf59169a6bf37045386ed2c98464e99265bbd. 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/QZVEM1877460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05c05604facbcc7768d305f0e57c77deaeefd6efe68f5e12643755b839dd733. 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/QT5M32544033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c835b2729099907aad0f2f44428e0cb637854eb954670bf027ce582de96fd9e. 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/QZHN61997085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa722baef633181cd51f0d1ddf9a5cb9665326cc1a23c48c9f24cf99e5fa2db96. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXTHX1900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafae7bdbf34711c4e6b81da772d852f7c18825b53fbb2c9318b7af558897666. 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/QZN882298582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc144ae8dd9d603dc169c485a49cd82985078578db7fe3d6390b41d13cd9455. 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/QZK6N1901553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e190b97a0200a59029c2e7261cb28db4a7a8fe087d8abf891286a6ffe077d7. 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/QZHN72049079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d538b1b1e815dd1a56e559515073b14634d43486d1e0fc49798615fecdc370. 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/QZNWT2024122.