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 0x5b3a81b746ff9e7b24733cde542a11c61b52d485a599c235e77803d3989fb9fb. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26d9a6e7-c933-4aa9-9ba0-2bddf7adeb93.json and https://artists.proofprofile.net/proofs/artist/26d9a6e7-c933-4aa9-9ba0-2bddf7adeb93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
「マギアレコード 魔法少女まどか☆マギカ外伝」 Music Collection
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 0xd81fdad9fa8ebed9260e0db4bccaaecf75c03d604814e6a81934f2be1d7382d5. 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/JPE301800788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3f34d0f5f943facf4285c760c235f1ab06c607ec789eb9d32dc9222bd1a66a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPE301800793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9f1847ef0fcd6bcb113139c7bf94f787244ad5db15c2db70766554a09da6c2. 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/JPE301800794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53546b2ccc424e2a31bc1c363d4aac5b341080fb9750f8b02fbdb021bf0b1a5. 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/JPE301800795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb836636a633053f94f8921363b3f9e74ec14871d6942a717ade0ec8aa57cc19e. 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/JPE301800800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1bdeb3f78702084ba089c79db4cd5dcfecbcaf82c36c08fbe7fddde22f9c94. 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/JPE301800804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9e38fa920ca7403df4142758abf589c7aa25f07e44198e257603e9b67473fe. 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/JPE301800805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08da73b76c374f03f4c8bba7c341ae4f352749509196a50dad4078234d9a12cd. 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/JPE301800806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349f4473d30a936247526b8a3c1f167cd79a90867910dba2d055f2583704e523. 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/JPE301800807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89662a0f258870986d21d6b003bf45a540a0f7d45a6c0930dd81df40576577f7. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPE301800808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc868a371c889e807cc4eb437cbade8458730ec08269c27804612d420848c207b. 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/JPE301800813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a4cb069ed2e0f46b1bb1a920f3f639e7cde18cc99e3aa9c7a1263ab9cd69a2. 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/JPE301800816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4109e28af52f5cb494cfca2d64a4d8676c36b96ff9b62c5d7c866b26d1fdeef1. 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/JPE301800824.
「マギアレコード 魔法少女まどか☆マギカ外伝」 Music Collection 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd82a368925c9b3a9366cdf6280dea6f34c09ce369a24b7687f6a33acd36b6a2. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/JPE302101008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7546d57693cd18530e6a75d833b1d178dcb35f4c4f40bbc14635012b4b8e7e67. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:40:14Z), 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/JPE301800790.
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 0x473bd39ddfbd7c537099c7ab794a61a135d27bcafef02523c21c52f805c90327. 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/JPE301800803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0b8d760f0303c2ad32e55df957d0a93f86aba32ff14c66e3adfc78f42b3920. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/JPE301800798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13bb6282c6f2b9bdc18adc265f6eaa23bc2fc622b236be3aa3ecdd417d04363. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/JPE301800819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a0839ccdcfbc33f428b7e145085df9a194bf2f1ac35bea156473dd08fcfed6. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/JPE302101009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36084c726b6ac82c081ccfd605f4fd7289959b34edb99f9a8f5d78950d3ebda6. 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/JPE302101026.