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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a757e12793c98422464c2a2396bf4cd1fba17f7bdad6d8afb2ced3ec706c977. 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/a1563835-2146-4290-bf09-99f64929d304.json and https://artists.proofprofile.net/proofs/artist/a1563835-2146-4290-bf09-99f64929d304.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ebf2ae8a1e7668a6f8d31cf567c366b1922d6141e38df3aa97b086eb54ace2. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/QZF8N1854168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fba840e962b3e1bf51ef41b920204d3ab5216a8877ab5b29aa407e9acd60cad. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZF8N1854170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0cbe88873dc18035f231014fde905270a5ce63702002f40427ae288abf331e. 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/QZF8N1854165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c8b6154dfaa1ce290552058bb529f1afa4059944db3195a30d67f4b6976adf. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/QZKDK2025568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018b225f319878498242d85f7f558258848f6395c21d40a3f4cc7732d9a6d997. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/QZKDK2086081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eebfde02a760142afc040daba0065ef8bc323379c3ad20f6f202640ed536fa6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZKDK2094132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe01a7be6429a9b900cafaad40f15a79a39719ad3c963a7ea3e18607aa2e06c2. 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/QZKDK2012083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15afaaf09dcf0c02b5e90313424a16f4ba70a0a89b0a5766227f28cf8bfd16b1. 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/QZKDK2003306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95a046746fdbb6e9066cc3f5ec1b90d60170d88877459a0818150014b3bdd09. 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/QZKDK2023844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608424223e3795183bc3d4218c0dfb3fda1a4c5804defbb6399ef44bb3c82c85. 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/QZKDK2078798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933ea9ea6c6511cb1fbe56fe275c710bd53268e7634ece0e963bdfa2670f0458. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZKDK2003975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fd6dfb934c2448360816959766e633140c91663f550ed34dccb4c3712c6209. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:26:20Z), 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/QZKDK2090980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeb7f3faba9df32d68fe321737212ea0a70f77b63d47cda19467d92ba4c5bb5. 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/QZKDK2082503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf402d80b76cdb41897e86762ab983e2650aca46ebebb68ebcecb8a318fff9723. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/QZKDK2093113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c3a50d327a24377e946d64e8fb69705df836625fec7f7571a22bdd166443f4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZKDK2081145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960945d3f576016863be6274f278757c6777d93333f6de052ee2406466ebef45. 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/QZKDK2085843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c8456d6a1700f9d22ab8780fbc0d0ac39144159992eb46a2e3aafa79a99621. 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/QZKDK2050561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d67afcf3cb9b3ec52f890325aac9ebca6319a6e0675e13a292b899f13314175. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:09Z), 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/QZKDK2046705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ec5e5268dd4922d60052c06d9896f276047a8addfce31fa4a1b00e16f8916e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZKDK2028108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18125b4d24f218f831c666409ab5b7885b761a469d31538ba3619c231cf872cf. 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/QZKDK2090297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ccc8ee0ec54c69592f08e337723cace952a4b704472b47895a2c44668dea59. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZKDK2038938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe497085dbc5dafa470b88a8d14e162852737443337f972f7296f93f7249a53eb. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/JPB602098339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bba52d7b9e4ba4a6ec2575266b54d6718eb6872e37a3761873f8314376666f3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPB602151156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427f13db455c35ff72558b6db09fb138f9eeee9ae375f2cf478b6e7c0ce058eb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6Q2174182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863ac7f65e72d3894fd1ae3ebb6eef5fd3d05cd861f1297bc9b2a74497f6b49f. 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/TCJPP2178734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cad6baa700b501700808b03441c8da064c68fbe4b282a71de9a738001b561a. 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/TCJPT2217264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a311cc290a8d0db3d6775b9c316950048e53a91d9ffe9b5e23d977a0a44c5d. 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/QZMHK2457108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873cccb88281b6ac29ccc919d748fb45cabf52f5f47e4a5c2c13227d6adb95c7. 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/TCJPT2288809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f784394b6a71ef4b2e7cbb150c25dee4e489fa088a98018965c32e55ebce87. 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/TCJPO2190631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7597a137c91b6d2bf833876bdb9683ceeb1baef0e230654481f965fd8ee3b15b. 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/TCJPS2203767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c5acb1bcc1ecf024dd1ca771e4bfc909eeec13590a7c89a2ec29671907363e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:03:14Z), 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/TCJPQ2126501.
Arcaea Sound Collection: Memories of Light
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c8cb9ccac9657fbafa363b44ad9529bde6d27fbb62872aa0ccfae0c945636b. 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/TCAER2055538.
Arcaea Sound Collection: Memories of Myth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f89490a3378b5ad0334c2493b392591ce8d854bc7deb7400bd51ddd580ebdb. 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/TCAHI2357347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eb92f0ffcc21917665cdc37324bcfc9ad77e015bd1ed4d33f7f27eb4a16309. 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/TCAHI2357421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29134e095ee1c7649fa3723c9940cafb1429762b927b9289448b5e69d219e22. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCJPX2392716.
Arcaea Sound Collection (Memories of Realms)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477cb8f9b0c7abb625d427c2487a2d83891503d09b6bc3156dd1e05bab95054d. 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/TCAFM2172892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a8141a0398537b7863efcb5a5c004cd8f1587413d0e54444a0b6ec31c11ebc. 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/TCJPL2030314.
Arcaea Sound Collection: Memories of Serenity
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d29b9be50a3d2e23d8c1f5cbe1e8af93c97ff455566ceae38de97313bcbf4b. 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/TCAJH2571989.