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 0xc143e11b384f6c6d3bcc14f041cce4f8b5c491db332526e1732f0488115920bf. 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/6039c33b-fa45-4a38-9a1d-f265d14135ce.json and https://artists.proofprofile.net/proofs/artist/6039c33b-fa45-4a38-9a1d-f265d14135ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Intro (The Legend of Zelda: Ocarina of Time)
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 0xae8787d1df4e2b2c7cc073e4ea02bc17488850462f89625732419692a6633a5e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USL4R2058571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e81fe0e5eb99d51985d53ee62f0f4f5f613023462ff335081c486cd54a016eb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4R2058572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8276f71eee5eb0b8dce9d794039fc3be96b69a12a4e8c6a0080e6167ada501dd. 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/USL4R2058573.
Stickerbrush Symphony (Donkey Kong Country 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0296f4067e95bd7bfa8f3a7855732e9c642a73f1a6f77d8cbc1b5a7137aada14. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USL4R2058574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77342b4952df2d61eee7d50b0539c3d98df4256bc56e96bc3109b1ed75703ec3. 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/USL4R2058575.
Pallet Town (Pokémon Blue / Red / Yellow)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9796d8ab82c11f0eff2b6a5579e2caf4a0857fb3fcde0edf2050b63f284e52a. 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/USL4R2058577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46170fe0bf5d88214c4ca8cedb0949c4931def847146382d66c57c9c3b51ca54. 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/USL4R2058580.
Song of Healing (The Legend of Zelda: Majora's Mask)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3998cb0d86f05c4d05ab2076bb8edae2a0ee64ead01c504e8c476b34df228b5. 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/USL4R2058583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37222a75db136cf07bcd63543b2e5c5d6b3a69edecb34d49a54dc049cd8b7ba6. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZRP42195355.
When Goodbye Means Forever (2021 Remix / Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fee9c3e8bf0bf387c0d3d1825047c0c0177e6fb2cb84d027e22cd97cffe742. 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/USL4R2162340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7daefbb2adb336f6c9a6da4dd14c34d526592d3024313e3f5cb3927eff65eb. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZDA62187445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1939900f34092d095323bdab20bb31c1ff2309abaa34bfdfd7d79f539d41b89. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZHNB2188342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3aacdc85a8d543b0758e1de491adaeabd422e239fd8e90556ecdbc79cfc7da6. 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/QZK6Q2009143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf025c48e2984937f4117974e8d684b1042904aa86a5c44e956d5da6f7665dc5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZFZ32474496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420c1259171f3c2136cccb87ce200658b70a72d33ad4a6c50e1a6960f4845353. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZNWQ2369316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da04ec4ad0fe4eebfe28111a48c7250fdc264caceea5755a909184ec1becc6a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZK6L2268903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e79009fa8341de6709dc3aca1d5809a4b6fe7cb38f1e8e66d195e5a193b7fa. 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/QZNWR2422345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96a66dbd3b0c01fff7aa1a86b31b3c5ea68f170c21b714078fab0227d3463e2. 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/USCGH2352429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22b094a4c21697a7f8d3f5eac9c2ada599df607e324f8a3af6205ad7352e2cd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZFZ41915772.