thumb|upright=1.4|The Akihabara neighborhood of Tokyo, a popular gathering site for otaku is a Japanese subculture of people with consuming interests in hobbies that lie at the juncture of science a
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 0xde1cf941455cf85e147ec4bc7e343c664aa2dee8ec85d9348a695b7fd18d8947. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed603b17-3e60-4768-8410-beeba7481787.json and https://artists.proofprofile.net/proofs/artist/ed603b17-3e60-4768-8410-beeba7481787.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 0x8a350d130b5003ac28337271fd0a351cf2bb9a6520a5195a9ed0e3db106e3cee. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZP7F2435649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5924cbe323af019844962274303cb4e50675eda85b6aee46555bf59357d1e7af. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZP7F2435650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a45993d57ee8784cf62a37ba336988e3d2bf44966a9db0837603766fc592a1. 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/QZP7F2435651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21af63274dd3dd8518859f745556e705e86a8881d6d611ae9a5680174e8e65a. 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/QZP7F2435652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf60835282eeb86f2f4a20f5a1bb49598351acb758040cd8030898c71be4c80. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZP7F2435653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722a06bb6b413ac10ede00a5d5a580d63c6a7ce9dcad4c088965ed3d702759aa. 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/QZP7F2435654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c969f8df30253ce3d7baf17072e00e8b9f9e8e106dd145577d5a28a46883b8. 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/QZP7F2435655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555fd5b721f9c3f80e727370afc5bd9c2255b20f721c7f5e294485cbaaa1b017. 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/QZP7F2435656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5471be77edd675a39dabeb665c8a25602f03f838a1a94f6a0336d53859d8f6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZP7F2435657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386f6f9d829fe6f3a8da753b675a9f4e56005a46506c56d0154c3e5916b364d0. 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/QZP7F2435658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91d5b3aa7f19deed1cb5a44935c9b7764bcba8906cfbef3b0e6a1bb53951fb2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZP7F2435659.
Celestial Melancholy of the Elric Brothers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27033c9e8b5f482b6db6693990f79fad0fb3c37110521e1e4b09f962d8e3c28. 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/QZP7F2435660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4be9519eecf14c256f6d018e2549741386290b421811575a6235fed14a9c209. 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/QZP7F2435661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7967c3eba3ec2f9fa3a1b986668c02af4c3dbfb7dfd0557392846ee4b0112ad. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZP7F2435662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074a41720f4d7080e980b3efb4026ff9c95543b448afcf109899886b358fb898. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZP7F2435663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb5c3a7a69e5bf1106da5be45adb29e026cef28061233c41009e693dea4fc74. 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/QZP7F2435664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f0975bb0e4b91cf416f23d8a837efe36c5ac2092c5c2aa5e7b5b910adda84d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZP7F2433327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fbc740957e8b6ec804666f76cbac093cf26e4a5a5ee9307a29b15a99868c11. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZP7F2433328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8e20e7ee6f4a7df87d3f0546812c1aec04844b8f01f34178d93a274892c60c. 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/QZP7F2433329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ffe9a60b12848a2eebfc9bfd51739bd3d0e0506def3ce0274a345032fc23eb. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZP7F2433330.