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 0x6b2963fff56f4614123c7ec209a0c125b75dca0cbe75c4b1f0c0703dcd2d5b23. 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/5257f6d3-750e-4c2d-9301-8f9865cf5784.json and https://artists.proofprofile.net/proofs/artist/5257f6d3-750e-4c2d-9301-8f9865cf5784.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 0xc84a1b753ea36505e264bb33b3c5a1e270077ad5ee836cacdb880021d95490bf. 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/USANG2293309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04448de187dc251a8672303736852518419f32209ab22f5d764c59c650680fb4. 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/UKZGC2409243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05dc1914d30640dae16898e15730bf13c55ca5563e792ef6486b1202333329c. 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/UKZGC2409242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63805647877e96bd2356dcf4bc0d6f9a6083badfa1cefa2a09e1b153bf68b895. 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/UKZGC2408711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8335d29cb4cbce525d75166708ed065d6b0f74b85668fc4328961f01880e952d. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/CALVP2418719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2c0a8ba9b49cbca5803150e82b388fa63285acc240e5872dda13705c53b9ca. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USANG2421949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd497ad4f73da1ca184ead66ea52fc459974dcedff44927b7d18c01b9ce66ced2. 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/USANG2402620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c8c251d1384b6f0ed136316f9f226ae2adc42e48370aa6afa9b9a347179d9a. 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/FR9W12429333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae4dda5ce2a66f6d0773a8955cdbbc1cdf75143db0dcc23e098988e255d9b67. 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/FR9W12429332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cea6acc1ac5683c78d2e44f5c4e519f33ca41053597ea41317770bf8c53933. 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/FR9W12429322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a718419deab8b4e983e807e62fcc1635f84353155ea1980d7b0a91c35b736a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR9W12425404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f62828391f053e5b7b6726a5dc2cc0e0146e0679efe08d98fb06a87b021d8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR9W12425407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b0ea17398d20bf06adc70d0a686ed9eefb61a2ecc4d5bab9297aa1436feac7. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US3DF2457603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd609e9bca1a3cbd41a139581763f0dcedf36c5e83e2ee0036b3bdb4b2b873380. 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/UKZGC2309301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93c0450d80cda7c78130d9daad03780376403aaabe1aed208f3069a057b67ab. 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/US3DF2409010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef03961f1f12fd592f65d090d8c521240fddc79e2965d3ec6e4b14041a4794a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/UKZGC2400898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f27d27ffb06d0d2cb2d1efb3658c53b76a9b6d16476d391d086cdf6c499035. 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/UKZGC2400757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc1274f6d6f18e51966fea825b9b12207ac719135146ec964a9a3a8e9526656. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/UKZGC2400766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ee866a94459ef814b684ca53fbbb454e9f8e919d5fccdfe4ef0e89bb38bb21. 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/QMANG2242256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d2dac359aec979c023bb858e4356930e65a3c20e39c16923d175f442f177ec. 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/QMANG2242255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe3aa41986978e6271fd434408d10d80eedc1a3dda567b8d636cf3cb9fc8916. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMANG2240420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda7f612aff9e8f46b5d252b0ea0f98d5a2001e8a01e3fd24f50211c8eef4b7a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QMANG2232719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9a7e50c20798e22c0a0ead939996e9141b5e00d5a58d661db83802df25123f. 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/QM3DF2286526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5009d0d471a136273558f98cb75200b7c11fd44fe0676d4c1682373f20c479fc. 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/QM3DF2286525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4343a10dbcc96527d88691f3e57f643e15cc1cff8dc49bcc2823cf43d3a68e. 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/QM3DF2286523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8be7ffae6f7c40b5ea5cb0528a3e7b965da7331b07644e51f39ae1a0df8c161. 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/QM3DF2286521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fbadc7287a7a88cef42cbf0ce48a52d8933632f2eca3ccd23bd9cb4a085a88. 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/UKZGC2303094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a496393ffa4b4d0b1fa2d7cc420744e7860e42bea7d3c35740cf987b487754. 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/QM6P42377511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f2c49d8700cc3ccbdab93c4a58043820c951e590bbd916025487da0a4e7acf. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM3DF2202346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e6539224174182baa33f58e1d57fc0fcc7516df934641e76792508b48105c1. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/UKZGC2301830.