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 0x0edb33d96fd14690a6b7f36311e07a8e547a34dd34ce6b69160a0bb10390be5a. 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/2273987c-1ecd-471d-be98-5e5c77338229.json and https://artists.proofprofile.net/proofs/artist/2273987c-1ecd-471d-be98-5e5c77338229.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 0x65701fa678b698b8ddb0ad74970cbfae0f09f78f91760314eab984ea398a4128. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK1928549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3455c47e46aafc92afa912e4ee887158c9832e6ffc2cb19d7e55a567aac204e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEYOK1928550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a36710657fa9a4e97f8f268ffa3169c6b005323026979185e96a6359a495eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK1928551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3c7049cff52872348cfb5954527e95ea04175046d267c9aa8460bd8a052104. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK1928552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cef116289cd284fdedcbc4084676bf88292ee8cfb817aa13adf61091f512c2d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK1928553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a19a82d61eacf2190e9bd932293989638af7331ff31c24480f07e401c305afb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK1928554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee47ecaccf65b548b29760c5c912060e617331c3526be616d94638e157df2135. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEYOK1928555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4fbe0db9ae7312403d2f9a7f7b38c4a4583cf11def71ef09dc4810ae32a186. 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/SEYOK1928556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2482e5f9be3e598fd45a449a77a5e66d0626a37d50e3ff1a45497765975247f5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEYOK1928557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739bc9b631710f671401f79080d57ec16d4d3912e43c118ebb6d1c08745487b2. 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/SEYOK1928558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3319e670b7cf01097060201f10a522855221878ad321b8949d2dc7f8901b91d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK1928559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef54b035d4238a66f52db1ff34232e7a4df3a497e6425848f26bfabe21d186c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEYOK1928560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d07db10512001bc50a7d58f45a215e7130fbd6ba050bb5f0aeb5ed27b37f5d9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK1928561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772caace8c2fc65e1a9731fe816fd21282a31b6235798325dbe170c3fabe299f. 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/SEYOK1928562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57306d3f38680c453eaeba22a0859355f6b5676c806cd68ec41e01ca52c5f4f6. 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/QZK6J2278192.
League of Shadow, Pt. 3: Judgemental Day
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f73b424368d45c01e8b865aafeaf7c91d04895c10bbe54aad45715a8ddfbd4. 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/QZDA62117283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23e9b494da5cd03f556454fef4d30a11b3fa42861c07a9ca5f39be2f86569cd. 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/QZES82021495.