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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235b6b6f03ca2b1279c01ef5513566546afcf4f12e6993a1fba8ef50d299671d. 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/d21ce369-7dbb-4c27-9dfb-6affa37c5920.json and https://artists.proofprofile.net/proofs/artist/d21ce369-7dbb-4c27-9dfb-6affa37c5920.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843fd90d3fadae278ce9cfed599a7d76c76654e4b54e91f4afb8d8e0da94066e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTBD2458974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e7d165b633a741afbf5886af24535385c7d3e1965a5ba4f5e0d0a0b123a099. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTBD2458971.
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 0xed8bd82fbe27b3c1dd9d0515751148e0d7c090513f36b6b185288a7127fd8a22. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHN32110448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704b702b7316e916fa98350555b7aeb116078dc4245cb9816f26cd1849588e29. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN32110452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbea6693496f26e76b15abdbad962a2fba158692fea32936516f90d3048f81b. 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/QZHN32110454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c5cb20384c36f254484f3729810e9a783b7ec5208b1142efc4c83238f806be. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZHN32110450.
A Cruel Angel's Thesis (Neon Genesis Evangelion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9051d4b2eaa8398692607cce13a8d4bf0fac853f6d01ca7eba7be95c896af441. 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/QZES62177152.
Beautiful Rain (The World Is Still Beautiful)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf106791734f5ef24ccec6ec7ee6718561ddaae2babe4e42bcd374f956b3ed636. 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/QZES62177153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c2bd02f2291d22961821cc7dd3338278396b81945df8ee24c6c9fc522b5177. 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/QZES62177154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7c612b558c28586b26dd41e9761938d75acbd5bbfcff0c78477b2a6daa499c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES62177155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d29d6e1ddda8bc536d01701777a543e1ad54167acb8715bebf2042e716a064. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES62177156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fe74bd2830150f96b190cc7c3160143d2f3ee5862e762e3264ee8e2176260c. 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/QZES62177157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70438ad742cafe2a41a6d194fc04e757ee8976d13ecf7d87e81353aa1c6c20f3. 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/QZES62177158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8615191066b506079c8a948de87a16a0dd519b29ef9fe1f57c680e5db226cfa7. 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/QZES62177159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a69a4547a0c558a9f57f28a5f4f3b6f39fbafb4abba774060672f16ee7ba1af. 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/QZES62177160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe43bc3d8a75d99e9d0f2317a70b741d28e4acd476b27e820235437984ac83e0. 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/QZES62177161.
I Can't Make You Love Me - Acoustic Instrumental
Tonari no Totoro (From "My Neighbor Totoro")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d14b1f34904c02845b3731646a907ac93e0c7df57749b291a568d0cec34745. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/QZPJ32196797.
Kyoukai no Kanata (From: "Beyond the Boundary")
Ao no Waltz (From "Josee, the Tiger and the Fish")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc7a617a8d2e98b26333d86666933adbf31118241b994683afb063766c8ee16. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPJ32158880.
Only my Railgun (From "A Certain Scientific Railgun S")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4021963da92dad49f44780fd12565f0af23c8c7e10115af3f88e61134d415f30. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZGWX2040186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4b85afe0c12c99740e05d3c163c95e2ce1794fda5f6ab1249476e968f35d72. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGWX2005100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392f8a4a90965237d124f5e71df810c579d5cb0951ca3a8a34ae34a91995c5f4. 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/QZGWX2002414.