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 0x2a72a098146ea6e967289bf97118a841b53eb35a1aed7cb4b6214be30d053920. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02402570-7e5c-45ef-919b-bf5e943c0359.json and https://artists.proofprofile.net/proofs/artist/02402570-7e5c-45ef-919b-bf5e943c0359.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 0xa87be4165270181f2e6cc75ebe67f31f6e6fc356961aad6ce10bd36494b11838. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZAY42000443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf790db0aa066e105be6f143aed14b25a9e99923dd805321d29ba6d6d71003037. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZAY42000979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fac9fae5ae2b79e53ad42f05c26499d988ce6102aa7e50a5d20bee01a397f75. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZAY42000435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d8d2c732bae74781e3c18c0ba21d98060d622bf8d7fb0fa57da06a3ad18fac. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPJ1997209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffccf4c6602b6d7c1f808812e57726f691fcf15b3622c3e9e2a922a4b118a51c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCJPJ1997263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6717ca3b478892918efdb427f34e7841ba743769c501c080af37fe8708b26a59. 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/TCJPJ1997275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227b8d9b722af9cefece6176514b6518cd78406f09f04f89127fe190d5f55957. 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/TCJPK2059400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fd4863fc2f73d7fa09e22aaada1c736c010dba2f1b8164c8a2d381d0f9cf0c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPP2138466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0268929d50f9711442d19e56b02eb54d3da8d84cc11cf897dcdc9974d1877d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPR2253727.
音楽的同位体 星界 1st COMPILATION ALBUM メタファー (vol.3 残像のメタファー)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21acde9c9fd803a0ca918998ede605cd12ed8eefc0150569c830c3ffa5f7f39. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/JPY392200536.
音楽的同位体 裏命 1st COMPILATION ALBUM パラノーマル (vol.2 玉響のパラノーマル)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf90b58f960f467b8f13762db239f5737c30433394a1f9f1f5066fbcf417717. 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/JPY392200656.