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 0xea2b82db0e6b44fd49c1bfba58d61392da61278b6021cc4f3936e4d6a52d05f1. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e54c2aad-ebca-4f02-b2a2-72f3292c1f1f.json and https://artists.proofprofile.net/proofs/artist/e54c2aad-ebca-4f02-b2a2-72f3292c1f1f.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 0xfa9727cc5ceb481ad16a84a1241db0dde983f78e8a4fc5183792fb5b9d45ad5b. 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/UKZGC2305354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3a1a052d4721abd97e8c208c8a0c67ac63ea389c63374beb7d515b0dda2b08. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/UKZGC2403375.
Kitto Wasurenai (Sora Yori mo Tooi Basho)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7eaf918ca1a22f5e8d1401c2ba8947bbdbbeb90ea0c98b35ff8cf96c312254. 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/UKZGC2403376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33b8cf40f940624755066995aab0d24281c6842831f0bcae348bfb85013aefa. 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/UKZGC2403377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d64249403e77d5dd01a4265cb9ee184aa617fe59c03aa2ab91e10b3bf5aba3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKZGC2403378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f05d13101c50336e2ba851b3d5500597e5a1947e7d004a3a7d062ea50792bd3. 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/UKZGC2403381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2e6dfdedf8cfd94c7f155e17dde18d0381bdcc2cc9770e84d3a9e277ea327b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/UKZGC2403383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717e6186e8537337d1b999a19b56c47297520ee0da1151001d2532b7af6692d9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/UKZGC2403388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c512bcd8b25740c77d264ac3de962e0f3b3d8c890d545369b56f84c7f53926. 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/UKZGC2406440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072602d791accfc606f99b31ba7f8d0e11938fb756f01da89943315c0f257f82. 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/UKZGC2406441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa2ee575f44f85e9cd11be7491888e295023312da43ada5289dbeed6125a3f9. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/UKZGC2406442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2633717088d32f8fe4569bd9e6250c167d697cda0726d2e5c4bc1485cceeb0ae. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/UKZGC2406443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1562d4cddd8797a037a64a75166db604d96e98ee93e764d845dc155a20fca26. 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/UKZGC2406444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e968f3abe7a85bd6710bc12d0b4f06a26ae60d6ea3e4b1908752329a5fb252. 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/UKZGC2406445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8807293b98861bb8720a1c3f0c5792b9f3341d87fa411a604132fbc04b76787. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UKZGC2406446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d99e922af6d6bb2cba5952caa8728dd52087a67a1817da8be6b5d65e883ffa. 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/UKZGC2406447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cca0f40f17798f3a68280d27a8d12ecb14edb4c959e5041b99535f43c756a9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UKZGC2406448.
Reason of Quitting (I'm Quitting Heroing)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db313272b520602d807fc3ec4b48ee2ef767fb04329d5b33a50dfe834fa2579. 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/UKZGC2406449.
Komi Wants to Help (Komi Can't Communicate)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4539fe962c992a4fb748309e1aff5121397adcd4c15817a13f5a83842618f818. 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/UKZGC2406450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48d0396778b439e2faf6224ca7ad98e43ed3027ed114d593e44bff80f38dfc5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/UKZGC2406451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6b02443666e860ad246ef4fb3fb8b48d46551e5dfb3d6c2b934f1fd2f703ff. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/UKZGC2406452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b2b6d1dbc312bb0ab5a59364f3a89971ad00700898815606dde6420b53629c. 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/UKZGC2406453.
Dazing on the Sand (Shiroi Suna no Aquatope)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dba8d03c9f1ecca32c8fe16a5c55eb6343a3727dbc9801081870b2d398b5d71. 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/UKZGC2406454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8af6a336b15735e9a91d5eda0eee88a3b4c2de2b8bd01c5b05cf32a6c669646. 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/UKZGC2406455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f89e57daac216a531134a0f6f4ba1fb1f6dd336ae0fe818557fba4f189d850. 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/QZK6K2174206.