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 0x1839f2d015b062c81d33bbc99888b732ef84aa6bc787e8b114062720b9387b71. 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/c4624f2e-1144-43a2-b20f-22ae6124e82f.json and https://artists.proofprofile.net/proofs/artist/c4624f2e-1144-43a2-b20f-22ae6124e82f.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 0xd600235551c3b442eb59b6a0647df5ade6834dad798a9b120c04cb3267dff342. 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/TCJPA2415405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8d0d92fb1e6a5838c3e288976e200d0083df4af5760b010e7310c56bd50633. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCJPA2415407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477ac329779e30f9e2523c5fb9c18baf0b0e386763ffee4ca36ed18a0dec1fcf. 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/TCJPA2415409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2e2b1963df8a76c9090e0f1fda0f8639483fc1f77d545abce4f0c920f9eca7. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TCJPA2415408.
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 0x36bbb2deb54b6f48c3718c438066aca8fa773b65b6207b483a1c88c1fbdd0044. 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/TCJPX2390444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68593db5dd84b41e1676e3f19a000155add437639f422a1644441d4681d0eb20. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCJPX2390442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b918fc1e0815f215b1702ac7cbdaea7c4404d7af2c098f2826c4a634b079818. 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/TCJPX2390445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bc8c853c0cac7bb0adb137789f8bf425e72630781b4f9695905bed8fab81ff. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCJPX2390446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4681d5f19241b682f4bb623c698ffdfeedef5fba4c0ecfbfd4b70a136616e20. 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/TCJPB2408291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2514d1d7ced1f39947eb89b666e19cfbb88eb99e7937a89319191e67b73e90d2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCJPB2408293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1b78c676db67cc8082c57e2d48de6adef3b353c3ce8a1eedd835e56df27dc5. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TCJPB2408295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fcdfcb126eba4bd30e42e87fda0e0d1faa07f4af8bb65cf0fffeb570527580. 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/TCJPV2377469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2ab254e4dc289d5b0a90892e4741610523157addd0b7d9426fdf9899247389. 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/TCJPV2377471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48233365eb6ce28fb9be8693b3593b4839024078155331aead5a224873aa8d91. 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/TCJPV2377472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc352682ba4c15bd04d5cf8d9dc906e6845fe452e0d42815ca5cc9a4cfd8ba67. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCJPV2377474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba8b135040de99030bce9c9f4235bf479b5186d7ddf4840b589dfa556ff5026. 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/TCJPT2258557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68a3d0cb8b4cdc68966ad61e3ec1c478d7cf51d64c5424b7ca3aab0583f0a01. 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/TCJPT2258560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725131b5cb734af98a92335664e608de7af7917ee14ac8ee459ce9cfffc66485. 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/TCJPT2258561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2298db38a01128e1d5767059345a6a9e0319f56f29eb9125da6e165e310706bd. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPT2258559.
To the stars connected in July (feat. nayuta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e59e1f587fc91ce8c5a8bc25982a6fe3f67d9be3cef7a69d701c9825a58328. 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/TCJPR2275429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63d7ffb53bf0a1648134361f2b309cfa7bc0509ef89139cece2e97c69c6e8cd. 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/TCJPR2275455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe340e32fdc4ebd3354bd86c775f9dfca039cde4c952f1fc208ecbe6b07a0cbd. 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/TCJPR2275478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02a19d318eb64efc8d076e81058693ac0e986403809d0d2930c521e42b6784d. 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/TCJPR2275485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057b1cf643d909467054539f2e89ee49f02abbfe6032493a35e207b6b372c036. 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/TCJPR2275488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc248d2ba8cd79bb836b29b0cee10e518349dbbdc71cc8e638680d4c1d7f6cf22. 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/TCJPQ2126012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ad9bad42a3b971cbbcc009522ebb917a54ca99321e87c1ef7291f454e98cff. 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/TCJPQ2126014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c5246dd42391c5b0eb8a2144eef59506805a79b9fc3fab57ec726fa7bcf0c6. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCJPQ2126010.
Shirotsubaki no yuki ga furunakade - 2021 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377697550d8d6c95f5f3a2e4cc5543e3e0892a86b2dd03a7707b53439d69e96a. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/TCJPQ2126013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7f45e56fb80bc9daa2d1ceb48a81ec40e10e421657e7b34da512af7d7078a1. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCJPQ2126016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221e49d0676d5942b87fd47a8e9c76f9d22d5ae725e8b7bb9dccb37282031509. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCJPO2158673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c21d79c1145239dcb15b787a6151752f1bca792d2aca63a72d017660c7a8ca. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCJPO2158674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a3b7eb56b0f9c08f60e0a904dd0cc9a1ec80c050d8b85c9c3bc6227ec9aca7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCJPM2099317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9687cb4bba50a9f17e6f43d62ab229afb1a9d5ac2b6a12e76c615231cfa9d2f0. 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/TCJPL2045065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa190a138b3f39f5edb1e42f7d57fb62f5d2449d6ec79501ce7684f14ba5ff6ba. 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/TCJPL2045069.
Sekai wa itsudatte zuruindatte (feat. ricono)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f6a12245229d3919d6b1c2c981704f388148cf6ac74119868511ea9c4aca2e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCJPL2045068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc3ede8dc1a758176d3031c573586ec9dd4f58c86760cacc95d7da4d5d54ba4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TCJPL2045070.
Shirosumire no yukigafurunakade (feat. nayuta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4037c7f204b5a05ba6fc5534a3a4ee6b902bd5cf250ede7c9ab9c42c14d0ce47. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/TCJPL2045071.