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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad2a47b94c711b6b27cc89ed6cede18f603bf339060f218783962ceb049b0f2. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0316ec86-52b3-43c2-ba67-c737e964104a.json and https://artists.proofprofile.net/proofs/artist/0316ec86-52b3-43c2-ba67-c737e964104a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cb9e8c6471d6f4739d4d72ab0b2600583c52c4bd4e3d8ebc2e10d8ea9c3a50. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAN70070040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ae2a0edd2b8e51c7f6fdde7dbf32e981d168f57e7ed2a50675a99e666479ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWAN70070043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82de2a623f9f72387e97288ba03cf471d2758378af3ccbe58a7701a06118f623. 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/TWAN70070045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f533bd4dc0da51ee71b06c50a1aef884aa1fa75d6962372cf12e506de1a3b00. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWAN70070046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaee14aacbfc049f193448157b1651bb86220068d5b4ecdb605a99b49dfc36c5. 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/TWAN70070047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9850bc1e17c693fac1dd016b690cb17de5da5f662f852c0ea29abcf2f8400b. 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/TWAN70070048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c730f1aa51c178a1461f000dcd520f42f8709b48dd71291e80aa610213ae071. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:18Z), 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/TWAN70070042.
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 0xa14ecbbe5e1df33c4a4373c99206ec6f555ed53783ae37fbcda7f8170999de04. 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/TWAN70070044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed8f5b69a6b5754fbda2039d98088736c60bdada3f8559764aa2174d9bd907d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TWAN70070041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0e7dff1b145219919d9b2f493d301ef0444df01b583404be7dab0b8d52c2f2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWAN70070049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36eabd3dffcc27891c3f42d0d3cc8d4198eaa30c7056ed8f8b5fc26a148851fb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWAN79770001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5990b881159b04874cd5b1a443c48437e98dafa7f896027e537872cd160b0b. 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/TWAN79770003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bab0b0b924f4683ac13354ede41a8f70ae7c28ddc28cce84eacae9ae0b1f80. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAN79770004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d071253ea65fd63afe9df62578307ea9f9077bf5932ce9fb9aaaf8c01b99e24. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAN79770005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0e97215bf840d2bcf8b0d880a551feb453329d1d0c99a827ef45402f246a03. 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/TWAN79770006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9ec36ab6d14b263ff465b53274a214f1b57fd267ccc71f6da8bdf23de685d4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAN79770007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00989397d4e1919328dd24d78a1a815e447cf57e9f2bc3b40edec774d722eebd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWAN79770008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da645c4f60e53d7836c94b0ceaaf87254d0c72c4bc57256cc2cb51d11618f61. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TWAN79770002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd307e9df6cf8955c5ed1a523d39684d67adcdad512f8eb219b9a93e9e4ee3fa6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6N21707004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e41a992b82fffff6e949f6aa484c4a13134d2fe8153b289e23641d6d2a2b70. 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/QM6MZ1775752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3610d95f8e32c91b967cdcd3b90bda1d6fa1e1eaca65aadf4a0f406d898315a0. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QM6P41746441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6017e7617f5d0f37177b7dbe0fb5dbbc1e51350ff81ae0b79db326a3c13d910. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6P41746442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff99ecbd59ef587008efa5a25e0237609f9bf227c5e30781a205d2680a0cffc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6P41746445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50179bd301d8208d6ff8d56bde5b4d022d6fcee768fb3fb47b286442a62761ea. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QM6P41746439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a83e5ad33e3d4471315d939fcf979fe75b79be43bdf011ae5b41ca0b9d15beb. 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/QM6P41746440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25fca2fa7eb2665da00eea2e61c31bf074d942efbefc0745cbd83ca4ce4eae3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM6P41746443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc7a6185d1a6235b09bda91c70195c334b8223debe4d6826f10377fe7580798. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWAN79670002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f5320aab74f3997a4bc7cc176fc931ace340bb0a3335f46760dfcd7095ea5b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWAN79670004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943b20e25e4e0dba1b3a1f42ac8d5ee697e7bb44bdc4b7ce08809de42ff74747. 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/TWAN79670005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5296e80730e91b7e0de868b60e6ad336a4aeb7cd95138b6f3c4751e94ef7ea6a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TWAN79670006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f2d9026b6ecafb3e5a4234720107f7580c21675859b8eaec4b7d04f9d70c4f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWCT52438757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea15a6b4ccaab61df8757a5719a291e5de6dca19f1125adf4aad3e533cb89c5. 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/TWCT52438758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226d9cfce5f065366aaf369ca78468b6756fd4f3acbcd4a37a86e2ce26e44a1d. 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/TWCT52438759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fca1d719d2d5fd9cb8d584cfe3f19d9f29360af80158ae2e348b65def76c22. 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/TWCT52438760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2b4c266aeffa201a3bad56c0a214b04e11a77dd5e6c249532d44499953a0fa. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TWCT52438764.