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 0x71a6434b613dd77fdfc783d91ab380b39b3f7a29100c017cc02e7637c670d6b3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4850b0e5-ecd7-4879-a38a-475695f145d4.json and https://artists.proofprofile.net/proofs/artist/4850b0e5-ecd7-4879-a38a-475695f145d4.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 0x170c178a4f0eb623772488a9b912865d670c15d3705813d316d10123e82a85c5. 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/TCJPN2159757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dc19b2cc02879be2163d819b2772c61001060e747bdeb5e4028f89d73a604c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPN2159760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24c2cc2fea21dc13bf6d8ee0b485c789a0cbf52e65db95497bf8f77a766a9b5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPN2159763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de9b5130cd7f73fe51b10e15c0c47cf66fb7f59ba2672b9e3fadec382f9057a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:31:20Z), 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/TCJPN2159764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5214ccdb0c008ca7759fbdfc779826b7bb4a40dd04c54d8a38adfe544df1653f. 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/TCJPN2159743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a60bae4367a21a64a9e0eef5e05e8f3ae767a2059f1c831b544793d5ab8cb16. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCJPN2159749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170c178a4f0eb623772488a9b912865d670c15d3705813d316d10123e82a85c5. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCJPN2159757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc022a3ad77538479b8d8f0de942ff5d7936323d5aa96454cf5d7c78f4fe79a0a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPN2159758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dc19b2cc02879be2163d819b2772c61001060e747bdeb5e4028f89d73a604c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPN2159760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24c2cc2fea21dc13bf6d8ee0b485c789a0cbf52e65db95497bf8f77a766a9b5. 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/TCJPN2159763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de9b5130cd7f73fe51b10e15c0c47cf66fb7f59ba2672b9e3fadec382f9057a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:33Z), 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/TCJPN2159764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa875730ce1b5ab5e72ccf218dcfc902a3ebfbcc4ca4c4f943bf52f00b90ebbde. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCJPO2190915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c339f44556612574f028db59011e4b09d2eeda0db0220fa3bbc31c7f5dbc5d. 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/TCJPP2136336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf376531131bc56d98d32e312972fc496ab3e3a8629718aa0ac98b95fc02fbb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCJPP2184837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe301e97685cf0ed402d8a30b7d7cf425b1ff83fc61b9bc5ddd96bbf37ab2b3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCJPQ2142178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb915ec515ad33c9a19de208c9aa34b5c47f8482c3467e22e1c0e0d32f787c6. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/TCJPS2226911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09caf3f285031aedd6616952ecb6663bbe38e88b38a9b52734a9505c6ff67411. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCJPS2226918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24ae3e5705a145046aae5ef901356eb642d400295c425db0c4c64ed588f16ea. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCJPS2226920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa830f42f629ae0c2d30d2c9eda4b13d9e51c39009f32bd9416a2a8d818bf3e2d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCJPS2226926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97e4adaa231abc71b7a4a846a92e2b3d01d6439fb7f02326f3c7fd11c7c550f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCJPS2227259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb915ec515ad33c9a19de208c9aa34b5c47f8482c3467e22e1c0e0d32f787c6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPS2226911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bf63cf6ebaff2a9153b6441e33a867484ac2d21fa57835a84c4caddfdb9707. 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/TCJPS2226915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24ae3e5705a145046aae5ef901356eb642d400295c425db0c4c64ed588f16ea. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/TCJPS2226920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836aa7e142d72290dcea09ce47d3b553cb408134a1461f032a627c6fba97bee5. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:16Z), 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/TCJPS2226922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa830f42f629ae0c2d30d2c9eda4b13d9e51c39009f32bd9416a2a8d818bf3e2d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCJPS2226926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97e4adaa231abc71b7a4a846a92e2b3d01d6439fb7f02326f3c7fd11c7c550f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPS2227259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6963f269c38e7db517fcafbda648e9403d73708d926ec640fdaf2c2c2cea4b4f. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCJPU2370920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6963f269c38e7db517fcafbda648e9403d73708d926ec640fdaf2c2c2cea4b4f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCJPU2370920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f286280584d30bf1624da1f004c39b692d1827c1e70acc7057a55bcbc162ce. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCJPV2347254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df14793731915296a98db853a674284f7f64e5e85bd39716030d4d793609ce4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCJPV2347259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f286280584d30bf1624da1f004c39b692d1827c1e70acc7057a55bcbc162ce. 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/TCJPV2347254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df14793731915296a98db853a674284f7f64e5e85bd39716030d4d793609ce4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPV2347259.
何時かの夏、君は綺麗だった。 (feat. てんぱ)
One summer, you were beautiful. (feat. tempa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ffca3307413a8dbca15bb78569832e7722892bb21420b7d41b211e48c32bf1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCJPZ2408615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b76e6e6a5ec0f879159615e512bf07c78b7dad6138f029b80f60b5e17e1ea3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:24:05Z), 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/TCJPA2492903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6265d8eaa56dc7cd69af92573cd3dc6b4343b87bee7bed0f0a4f49c37b8c687c. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCJPA2492936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971f45c6930083c7c984090d9287eb093b105a4a38aa3104b9a6c66c63ad8729. 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/TCJPA2492942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b76e6e6a5ec0f879159615e512bf07c78b7dad6138f029b80f60b5e17e1ea3. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCJPA2492903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971f45c6930083c7c984090d9287eb093b105a4a38aa3104b9a6c66c63ad8729. 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/TCJPA2492942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed53fc2b829858675e99806333b96fcb3cb3447cebd0e32f8290e2e7a5f16d1. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TCJPD2432234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad7a5032f851a9310cd9c4da3c1a7b2e4ebe635f7401bf7059d44c57b5464b7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JP92N2505867.