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 0xf62d1ed548aa5dede77c320703b3c342f8e22eb23733590c3c0e888ace5397a6. 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/b14906ba-3c3b-4c3d-9f79-047cc69fd6af.json and https://artists.proofprofile.net/proofs/artist/b14906ba-3c3b-4c3d-9f79-047cc69fd6af.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 0x94307818b12e789ff0ad60711419dff9c8ff37a3ecc2716e4e3e2ac5458974db. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/FR10S2021845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681925598ed1f3cbe7847da99dcbd5ffb848d4ee90088f60668917f9f5699870. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/NL1AP1972642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dad385239dcc9270a144ac77d7b21d50f7cbb51a5f57d0a7d9f6ffff1a571d. 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/FRS182039808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da90498f5c5d95a4e7e362852c7aaa21a214e6ddb9895d3c80a671baa5f5074. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR10S2170642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcca22fcf66b8906e6be296c72812ccde5d10d249311f943045bffd3b1ea4bf. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/FXR592300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8e90bf0256fd9353f51ed808beedbb04c474b9fa5b0229afebe759c30322d4. 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/FXR592300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0022565ea636dcd2d10c41a3fdbeb3d1a3a6c85082746edd56afb1828e8300. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FXR592300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472fb009237a6c630da8b6172f5c7a23dd34fb7d22490f5fed327ec81be640a3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/FXR592300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8287d5d7aecd94f8b722bca3174189549b5a085e1ddb08dd9a037366e208cbe1. 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/FXR592300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e2cfef2312bfad2b4da11487a9edef0655e822572d7cc57d9b5e4fadb2e538. 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/FXR592300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7948023943700308c5963ced7fbd495fa9736dd808d64a9d4cd95f63d1fe8e. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FXR592300059.
Crush The Mirrors (feat. Chunk! No, Captain Chunk!)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a125e33adbf2e91e678424d89d06d769e0b7eecc58bf7dfbae6c7cbabe09b5. 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/NLB932409004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d329853ed45dc9378067c2316a4b633c47b645368938b08ac30ec7d7f7bf59. 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/NLB932409001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8499714ba7fc940da692ad8a635342bc1821945e09ec923cefb1973ff7919794. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/NLB932409002.