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 0x4205310d98b04823136d5a8735eef3abf92a4109ef10ca2683e41b2202aba81a. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03bcfb02-4b9e-446a-be80-86f4ee263a16.json and https://artists.proofprofile.net/proofs/artist/03bcfb02-4b9e-446a-be80-86f4ee263a16.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 0x6eac2fb15713091edfd56c93fad36507142124410555409ed8b150547f4e6591. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPA2484233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee6525a314bda557e00bbfd00e00c29fea543ffd812c6fff7f3465a3f744653. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/TCJPA2484244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66357aae2cea4328a8d899c3578d037cab963bf1421bc87125765ef97c19fe27. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCJPA2484251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b8cabac0d436d0ce918e97596092ad63d06fe452f44fd9519de563de376d0d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPA2484256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c41e68c40e9a9312694e3f9f617c4403ae231711e3489be7a6bb3a8abc6b20. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCJPA2484259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fc718dc4d59966832340467daace89e310ebc6b9d4e2c50f6cee92b462a7be. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCJPA2484231.
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 0x45fe6179dc08b333bd587bb3d1e0c7c755c20a73dc1bca633055d97fd00f4ab6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/TCJPA2484237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8e095d49bc5018b211f5b857fc87f030c7b55b9ac0e9361989ef7ff774e564. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCJPA2484241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63edfb27de4114f194f866034252554be787e23764aa0278aaafc9892f743872. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCJPA2484249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816e43b9858f20c51d35003801169ef2e0aa3a20fd21508928830afc6564fb95. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TCJPA2484258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5dfa5ce52bdd5b55d8962989ee19d12d012b2070ccfcf5aaa28bd7a53d291a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCJPV2304205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9470c9ec8f4fea699ab97bdb9751ea721ff53b1f5299e7c51588fe386afc6a1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPV2304215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404d14eb4fa1ab202f2239416a37716d4bd32969a1e23b857c68b00f0bf4f105. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCJPV2304223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a219347765372bc5a506f858dda5942e30cdb215bd5f09cefd06ade2dab223. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCJPV2304225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0fbbb9b8a6d4cf9b63dc1e212a392128722cc74e64253759230bdbf5ddc4c9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPV2304229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e5e22568452b10c3b35e664a9c4de954458fc095fc50e09787187a9c4d4c3b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCJPV2304233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb54ff72c87e86861536cab3f9f18b163452d1b8b80a3018904cdc0e1d304dd. 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/TCJPS2254353.
Isekai Market (feat. Nanahira, mochari & Wotoha)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ca39e56ca419be1eb6f4ed75f77bd76c8107963b37adf55142f0b2fff550f1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCJPM2082713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e778854954b1e64364b454b6da5e7964360a0e140e885413015c932ad11124. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCJPV2384690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beaf16db0963189f9fa9b4d16fba88a74a53924fad2150cc6784073f9d55305. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCJPV2384693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3752719511bb354d7b393cd718a36d4fe945e7c74d8729bc2bf8dcf3da3a26. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCJPV2384701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc7df0f9fbdf994eb4d851f517aca35ab7855005aabc7cb1410d08a4cc44f25. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCJPV2304196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdde8df1d15ad2eb95c87630d3ed7ba53ba87dd54deacca58f7a111f59f463c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCJPV2304198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e024ba152f49c6acc901c56256890bea934fe22d9488c307e0024b63149c5c3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCJPV2304207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4546e577aac5dd1c9690d33e22ea42a0b02dbf9f8190bf2b653190c92b8bb345. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCJPV2304213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f2263c8fd419d2e08cc23fcd64edce8a4501d2c1357842c29175f909bd2c46. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCJPV2304214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f8cddf43fa52be535edf748cf9c5729dc4155e64b4258d84ab8d57a02aaa7c. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/TCJPV2304217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf502ac66c5fc6456eb303d491d06b5093dffcf7bed64effa17a15102412292. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCJPV2304219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a607dc0bd1872bcf16e07da59971d54c42d767dce3e769370b026c5123527e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCJPR2289514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a03c2690b596f79f9b4e192fe0ef5aac2b9448100070ed0fd2decd57391bb29. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCJPM2082710.