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 0x0dedc09d18cd7207188d0c50dad2de6f559054aa1a18a079b3a70a65aaf6d409. 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/eaf77a5b-4414-4e84-a767-175bc0a6e302.json and https://artists.proofprofile.net/proofs/artist/eaf77a5b-4414-4e84-a767-175bc0a6e302.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 0x01a26028e4a4a28578eaed02c58d0b9bc2cb93035cbd9e444ca71592b71351b2. 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/QZMEP2398874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936e436684f8e3d50155d93bd7214c6c101d50c77a9b544696ed40224bce583b. 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/QZHN92546531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bfddf39b73ac060179587edfde7c972a77bf107892045dbfb8b171c058d641. 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/CA5KR2349241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eba2803ae7f066c872a4af5252785c142e212861a59eb3ac379d7d949bcab5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB22498665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd015e52fa9208128c7e92a23e1ea812ffea175fde6864b25e7abb17ad46e8b2. 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/QZNWS2442436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c253d462c943f15ac3dd520215125fd8931b72ce4c1c18956199ae1a093d4a. 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/QZWFK2325132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08610f0de0b0f9c6e5065295aa61d6f13d9dabf8e350c55edfcb88a46c88387b. 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/QZNWX2360711.
Wasting Away - Archer & Emiya - Fate Stay/Night
Wasting Away (Archer & Emiya - Fate Stay/Night)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccebd3b0dc324a9938c6fbdb2ac8eb0505fac539f5d5029fcad58d89c9c5a1a9. 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/QZWFE2479304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cce08dc9eb3f73fdd5eb617eedf48c6d3f14030005edb709059fd6ff60660f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWT2387092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c601f53b1b56bf47a82b660ea08cc1813b36f2fb010d8cc12971deed4d11b69. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ762470749.
Long Way (Anime Anti-Hero) - Guts, Eren Yeager, Ken Kaneki, Sasuke
Long Way (Anime Anti-Hero) [Guts, Eren Yeager, Ken Kaneki, Sasuke]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ad0b90c104bccce945cb7a2cfd4183f00632103af24c2eedb88d88d4763b0b. 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/QZNWT2428300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64d997bd868be1eb84908b7283a70a0b67d54a3abaea3a7bad4fa94c1469599. 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/QZMEN2522642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb15a36b3142d1c15a4a96c34ca02a81016aa135b6df1e6c61e51a737ef788af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFU2421554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75779162800cf8ac6110344ea5f581e3ca2af591792614f89e4831e6432d7b34. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB92405879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0254940f029e107969771432793c22ee7a1faec555dd310cef0fbd598ab8a32b. 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/QZK6P2466942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ae1cb26b315673df2af70cadd991cc7db7b4cde5166df9744c9c2fa6f55490. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTB42399303.