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 0xba307a9752af52d90443515e8f047f5fe8fd91ad88ede2fe6e4684ca8e88e789. 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/e99ec529-4064-45dc-b955-3a1821069ae5.json and https://artists.proofprofile.net/proofs/artist/e99ec529-4064-45dc-b955-3a1821069ae5.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 0xdce364cc8e07094fd6a6394f19d1f53a919540d2b53bb3c76479a2adea683dff. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCJPQ2135460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc59a8df5c7b53f8d7becd82a1884db9991e3948405e76923b00e025ba1c5d1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCJPQ2135480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c3d143083c14a890eefa3ece382fadb1c522b561bbbff8119d80faac67e85f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCJPQ2149658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3794ef96fe8bde587d601fd184b0570d2a313ef0600e996c451f69646809c30. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/TCJPQ2135481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e48807767da23263c4f0528ab144c61fbc2054db3c42f2615e3bafa7d1a297. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCJPR2267120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189ab95750c9d5cd8a997d4b7a7534af5c78c80ad2e14f437c3a7d214c0867f1. 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/TCJPU2204465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4e9008fefdd8182bbcde74bcd56f6588149441de0d20bbe5059f7ede3d4a89. 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/TCJPW2306957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039443e65f5621a45ed8ad3a0a3c6d012e685450f2077300582f8516bcd81e0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPCO02333680.
スーパーヒーロー (feat. 吐靄 & ツモトアキ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f24ee794900454344a50cbb8ece7fe00ed5b83b68da5c43b8d415c07bf6eb0. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/JPCO02338930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a2d1d183608a7658afd913b90f21c263c3f30e4114e67dbda9b6a173e3ab66. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/TCJPZ2452345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43263e62dcce5fc6a8117f0ee45f7fa6ccba3d3051983643764b193d28b99125. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCJPA2457319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3565e4029a4eecfe7108a505b9810c7dfb4b2f5bf3bc4094ea8c92bb123e35. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCJPA2447245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55afe85ff67b6d2b359a603c0be4c5dc759646209d68f0ebc2006d83e534b357. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCJPC2487473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe585716650a56f8177a1880f701ebf0cb3b51a0a53cc2c2b7fed9f177241ed60. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPD2432625.