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 0x847a4486bad48fdf57393ae76653c346960f3d0642234fd1ef3cbfeb2bc24f9a. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc1389e8-4b47-48aa-a355-a8e39475bc54.json and https://artists.proofprofile.net/proofs/artist/dc1389e8-4b47-48aa-a355-a8e39475bc54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Deep Down (from Chainsaw Man) - Instrumental
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 0xf9f286527c19c29cf87283ad0a1399338cd5c5880f1512f2ae9349d1e7de7290. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GBWUL2317289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc464297296c4e5c4ddd153e9045186a019413c4f0d33a3c2317ca43d1dcc80c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBWUL2317291.
Aiue (from Urusei Yatsura) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da632ecbed4ac61085ff9b07c6e182362df4bc192543c830002bae41c0bed6e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBWUL2317292.
Fight Song (from Chainsaw Man) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8b4b29f160a776e3753035e5b556ea1d395b0843268f2b603f21d6dc2f4ea2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBWUL2317297.
Katachi (from Made in Abyss) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95342d036e5b91811831d30ed1ec2f2af6b70d52d372a8eef0b90cb59312156b. 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/GBWUL2317304.
Hana no Tou (from Lycoris Recoil) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cbca4bf2bc615e3f7d87dcc8b52d7e4f1976fe9160299d6e89ea729ba3ae6f. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GBWUL2317305.
No Man's Dawn (from Overlord) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59125630377d71311eebc29acd91420d2e20db9cc230ab0b4d4826b028c0e84b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBWUL2317312.
Naked Hero (from Ranking of Kings) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0657d485e0dc44eae8ca559ed12fed3aeabe71255ed55e9010ef60a57dcfa391. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBWUL2317316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7758369c31929686209d416bd0c82976ac564d0e2944beedcdfa6e1247def60. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/GBWUL2330609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae62a9f4bc64318d6c48fed6597278f6abdd7eb6340f98b9eea13d10cf66c29. 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/GBWUL2330610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0edacd01324bb915814f12de4485de2c20ca61b8dfa0e5909defb3d9b81cbf. 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/GBWUL2330613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2caa6ebb33d6719014acdd6ea897f04d128706072bf044cc0f6555b0d4400e3. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/GBWUL2330614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc264cde54360e35603d68c618779dc76f700b5163a8d54d150d367fb0bc41e0d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBWUL2330627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cea8ce4d79bcdfeab7bbe9d1ac920d73a111f700558965c6799993325341ce. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBWUL2330619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f35e8be4eb78a09c804b0a86f9e8a5081fe6f3504c4cace5bc411859c27720. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GBWUL2330628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7f6225abedae74091f2d3dd3edee018a6712f50c8d0174ffe893f7d08748f3. 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/GBWUL2330625.