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 0xaa4ac0cde1699ef23600221c719e17df6904648f90cb99439200f5e43c3e286c. 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/19560b25-d26d-4f8b-b710-3dd78c7df99b.json and https://artists.proofprofile.net/proofs/artist/19560b25-d26d-4f8b-b710-3dd78c7df99b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Noita, Vol. 1 (Original Game Soundtrack)
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 0xf90adbde4c7e3f67d2feaa6496effb338727dd75f37c7f020c695f566533d1df. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/SEYOK1947712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e20731136e8e11204a2d81022163c7be602acc04631a51b38ebec56ae59683. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/SEYOK1947715.
Noita, Vol. 2 (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4e370ba2cbc1c992eb4b3346bc2b4d75bf884bc8d9b5fb709535a15bdc4bfe. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SEYOK2033155.
Noita, Vol. 3 (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50308e3cceeee93b062f49bdb86f558368aa5fadd75730551de031db0bb6e1b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/QZHN32207233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789e813924750d5f9bfc131971a49e93f41448fd225f1f7869d2c9f2118e6de1. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN32207231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b449baadfb5ee007f15783af2918d52a4e8b2bddaf5ba2bcd53fde20a986494. 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/QZHN32207232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b48ef71dc2eab6d5a4ae9a9aced57173da878f433c0c45f4cf0104176cb691b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN32207223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d93be579f5d53b182a7348cc49335f0c80ad77409dfdbd1408a69172317b95. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SEYOK2033176.
I'm a Sheep and My Wool Protects Me from the Cold
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a41159516c41d0c409edaab5f3ffe07cd0393636ef35b7ef2a0aec5a3214468. 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/SEYOK2033158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a619ae67e3820e6f0880b45993c0c89bc9eea2a7855a46903e47cb25776fe6. 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/SEYOK2033160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de13a83b4b99c2cdf3119e9b2d29304d1ec3301e948426fc109a93adee5d4b2. 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/QZNWQ2241517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7343fabf258f156707a5827567edf00779d83f0f0da6d150bad518f61c7f24f9. 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/QZHN32207224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cb410eb5465e835e18fa9a5a97af3f8384696e163314a49942545372735a52. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SEYOK2033174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1146dcc07f9ed330203966566567b5cfff137fdee17131c0cf21caa69418c7a. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/SEYOK2033156.