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 0xde6fd3b8a6e1a55be2c53cc56e5108228611de37a587a7ed93551baaced2e04f. 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/d05f6068-249a-4f40-bbc1-d99a4ccf38e3.json and https://artists.proofprofile.net/proofs/artist/d05f6068-249a-4f40-bbc1-d99a4ccf38e3.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 0x707247f8dc2bb84297848fed4f688a9a8d8dbe091165405772221ac25e42fbd5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:12:20Z), 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/QZK6P2489852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f47b072629a68ef069aa514e11bd59b43c9f64f2b54358a615394f9b554bd8. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:35:15Z), 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/QZK6N2491134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb882fea8cdd1dd2b32129d3b0b1f1c8edc3953b0630846e1ee1f9f37d507666e. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:36:40Z), 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/QZNWS2483805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54be39b4828925a75e81a4e61ea2dc706591cacaad52ae9345390d3e2a46e96. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZRP52406808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27742f61975a9d9a4e5471019cb400f4aa08a0876ac8be0c03108ce2a63c4213. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:23:37Z), 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/QZK6Q2411800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f47b072629a68ef069aa514e11bd59b43c9f64f2b54358a615394f9b554bd8. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZK6N2491134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707247f8dc2bb84297848fed4f688a9a8d8dbe091165405772221ac25e42fbd5. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZK6P2489852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9732a663dce948b6cd6b6d84f8ebee4500df8f1b30e5591fb8774250d9514eb1. 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/QZK6F2498446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d2c07e7e10717c1f8fb8ce373a8a6947da61ea16def1cd01c7c654f9524ed4. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZNWR2441432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb882fea8cdd1dd2b32129d3b0b1f1c8edc3953b0630846e1ee1f9f37d507666e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWS2483805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ed22dcbb176649f3a15e580953cfbfe4802a7ab15c2b1fcc8936569119c40d. 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/QZZ772437802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c5cc130ff318876d635e2911adbf81b249166ca140009fcb1bb8b575fe84ab. 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/QZZ792406574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a770afc416ec13c7e3a7e0b019bf3b7d10506b0b91204ff2e06723c7af7579. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZZ7P2423585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd91358a6d2a6d659417af7e23a3188a736dafd6aab6f82d9a7fd5044c0f40d7. 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/QZZ7V2471282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6536f283511a9c2c8c114be17ebfcdab11a4799105d7320de7e58bdc7eed392. 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/QT3F42455046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d661b820d6e2f483ec47e9b3dfb05ff0585d4e38e5ed5f3dc5c126c64ea3b9d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:08:06Z), 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/QZZ7V2440269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e0c779199dee1b876cf69b8e5b6e43711b08191bb78194ce0a2f732a7975a9. 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/QT3EX2428685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef27c74492d60002f78800837886ce7c6228d847568d17c74e451675c892657c. 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/QZZ7X2427938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d9e07abcf046346a8bbae63bea4287b10ef6aa2ff48d1edeba0ba41f979e41. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZHN42515799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d798f48d2faafaa3447b1fd5e2bd22b16e0443c9ab4dd3129c75cd16299eba. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:42:37Z), 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/NL8RL2536738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2b241800e329c4e815e574b77dbf51b133faf75cb9ae1af370e7869017e22e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/NL8RL2553561.