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 0x3e7db89eb07aaf9af7099a611bf2ed31d1e38cbdd9f799291576b33d7af0348f. 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/fcbeff5a-dee5-48cd-b301-8c2bdbbb3fe5.json and https://artists.proofprofile.net/proofs/artist/fcbeff5a-dee5-48cd-b301-8c2bdbbb3fe5.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 0x77a103340b283f162261fe1d75e8daa4456ace7a00098ee7d8e47b71c6b5965c. 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/FREBE2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4216a59f9b8440f22cdb35c53eca1f1415f9c56f758c480e0e6530c78130f8c2. 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/FREBE2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e9f646a8fe558dd0079f99aa803452a52d501155ce657074ee8dae88252d9f. 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/CH7812405171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e55595e00f089c887ba7f8e4dbd45e5f42ec65371d699c8b17d1c87ecfe23c. 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/UKZGC2303609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9607d79fe524470915e3728468f1f6c0d7c9abad3f24bf0fe81e1b8e97d074d6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2303610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac82824a5289495727b0c381dc35bf0bb42ce4cb7dcf959d128e76131c3a02c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2303611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4931522bc79197da221fe5bd6d002f0d3fc15c260290ba4a4fc07582e552685. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2303612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8d1bfcb4b472425f946ad7caa4a5ea8bf115396f0dae72e382dbde9de5bea4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2303613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92a2ee8ecd9211c77a2c685ffbb0b2d740b15e2ac12f15485f1e4df5f1b79bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2303614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2fdcd198bc63b9ea716f4f273c917c52034ccf27f3d1294dcc981a2e13d0f6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2303615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9f935651cb3e767da7ce0d12623b7bca0d7ae24de9e6b8b74f9a2656619721. 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/DEH742424772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd088b4954b962e80d7415c1134049e8b125b32d468e9909ad342c3cc375e3ec1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2400924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec2e31199e3b310e7f057f6bec75252902515e58eaabfae7792ca357d57a235. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a018896c0acd7d1c82eb3e508ebb3bc92edfe2bb3c7d2a57072f34b2d24a03. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2470304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6a38e1d94bc11ae6591bf9e46c3044e07b989e333adb7f02f17aca33798bda. 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/US3DF2405123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05194667be4aaa33a2d66c5e6c2225ae004052f528ce64182e2b18f78571f99. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2401687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8d468f2d3699f6f6e059fc081deb0a76f0922bf14e15e3dec2ed95c65d374b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2401663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fb0f7c6dd4bb05f2548d47314bb9196f744a7b0d90378e9d95596fc75c92a8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2401661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510a8302d4e35c9db4f26a61d16d650b4f38f03804e664ec612258372144e594. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2401630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b94599aec70a8dc485edf9f6fcf49c168defd0973b8947622201ada4fde19e. 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/CH7812423754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b2e0f6d9830eff0eb2663b276d03cf55c66998307abd6a89d3125691032ac5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2401580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fba06ef50497bee0cf1730c13281e67c8be5a3150ef09cff8350d8acb54585. 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/DGA0R2459138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27652bbbb71f6344578601c1d5d963ea960ba7251bc3849e14563475ec1324a2. 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/CH7812417532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f49c63ad3df7abdcdbca363a970e76d6edb23e79e1731934374e16e8f70816. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2401451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e31e9ee4cadd00889233df8572f50361f42db65b74cf9295999ab48be51c6b. 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/USANG2489423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c965d6af1475363f54f5d9136675da547628aebb03c6f5471d47999d08bb47. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2401394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e1fbcd5d0e801f91d431bca801febb65b2aa45cfb8a7e67d3db24bbb10c706. 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/DGA0P2497872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5ed751a8029155a1e475c44682b3f8cc64343b0d52902155091cac1d7a4ab6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UKZGC2408458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c926336fcfc455fd874521a8f578eaa5bc664caeec8597ca25a58e25a3eded. 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/USANG2450460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fce8b36991ddd5942302edfc6c4321d1dcbf7ce2ff6a1125122154e0ecded5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2401325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6901bd445e35566141f74a8fa571939a0c6090a777fe2cc52ec68ab73ccd4a4a. 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/CH7812416955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8cce9de2ee51094daf267311f049b49cfe335656cf5a1efc78b5bdd4bfde62. 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/DEH742425835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024934641ae56170543a228def5588d285dd4c2c7bc7f37a8c7141b7e4bdfaf8. 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/CH7812413710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c22313830c57968441c8d219bdd843262cbb3719e3869e465414357343df38. 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/US3DF2480870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85107560532bbaabf4fb3da0d76818a0ae316e8de9640760d325f470d3379e7. 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/BKTNP2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476ae0f4ba2e5ebbf5a8c8e7e9894e9bcaf69a5d3ba011c0a2ff22fe824643e3. 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/DGA052453585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2da90d39d850007f8b5ac4cf99be930dd2aafe62515232e96e646a10ac6080. 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/US3DF2467974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae54da549ab32b01e8aadd89d46e28186553bab7fe01178867ad1b09a5851f5. 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/CH7812411949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d32469045960ee831aeb1f3724830fd0abb9fc0889c72d715f665061296dee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2465273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0259da1049e4b99606df0d806589cd47b23ffcb802e5bc88fc31832bc8f0dc7. 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/UKZGC2307379.