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 0x2e573c113c5992397a416d2abcf8415cb9cb8ccafa666dec0eb8dc7b5ac955a1. 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/b93a5bf9-282c-4943-a0b1-ede5c48e62da.json and https://artists.proofprofile.net/proofs/artist/b93a5bf9-282c-4943-a0b1-ede5c48e62da.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 0x87087f6be9a002837a324c18bff670799d0d6c9a836885aeb5e4b33792652873. 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/FRX762104832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80357087774c74ceb7fc51088b9fd780d71a1f99bcb8b4f0c841dfd6034d18f. 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/DGA072129207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d909a70ae5231d468cd043452b10e7b4803dbf3595c871529bac727f9769841. 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/DGA0Q2316166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e70b7434291a5098fdf31c6b88c0ed101b880b9fa5b9571047ea19405ace39. 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/FR2X42324367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc71c203928dbfd8a2bae9ce70ec1edc6a4329e02a101d094912330a6572daa. 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/FR96X2188793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62f578e02569bca843eef69b50371ac4c159e0d9cb341633094ab1ac84e7212. 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/FR96X2188794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb596a4925793fc55c6af311856b14b72762b63323b8d10b29ae388bd2a0a85. 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/FR96X2188795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dee528f188fdc34c6b6de9033ea49756694fea6ea27693dbacf2edaf73f9b8. 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/FR96X2188796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f5adde756cc43bd045c8503a0f882905303d6efe3bd913c234b951a57c68e1. 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/FR96X2188797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067f3f3f0562103d72c7402d8b91bdd8dc7c4e4a6957409cfc568e11e8075793. 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/FR96X2188800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb501ae2f0c3ac8f16708f24f0c8b1eda9b0316f75150415c8ee2f77f111a7cf6. 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/FRX282046958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d68dbc349b816f9d1bd0c53ff05557e2b88de09cfa4a8684d71fcc9472df45. 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/FRX201988732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba53d4de55d0e44ebc1df752a39d3dce83cda70a39d695cd6ed4fbd9f8f20bd9. 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/FRX201949825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aab53beb9e5eba9505b76f7b57175564750d6059ef85837b627b3bd55a3512. 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/FRX201925782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbfad51a3658dbd7e09e9ca1dec013f6e038cf777e87881c5cea80e06d43f38. 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/FRX201988738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d6be3c8ff01a3232b9aa56ad9acc62f323aa247aa516d3a51b6f1ca43c654a. 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/USJ3V1317662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cce1b6039f4c28b25aa0519a014a81e3f0114e0d7f06e0f9023e66a6c47c341. 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/DGA0H2309712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78eca7008e564e95dc7bc16bfe48b8793fc3b6d23d7cc13f7740d9b95a0e9464. 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/DGA092399849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e70b7434291a5098fdf31c6b88c0ed101b880b9fa5b9571047ea19405ace39. 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/FR2X42324367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9543243bd95129a6ae592303d22878e3a9ed0b012a2fec5fbd6fb36b53bf2d. 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/DGA052272527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb628bd7f7f7b7563f50dc74ea54ac3a8afdbf7bf629a63377da3039c0842f9f. 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/DGA062218953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072078098f3e5ad1811b488e3c72e37bce55ecc9b6fe6f49c850fca917fb23bb. 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/FRX872245256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcb8824bfbc50cddc9cafa06f689cafc8dfaf78e0870c7450a68a696c9d5eaa. 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/FRX762243942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72503d3d39f24ab9a7dd76a663347b5ebf857367e4d6c1a8a94bbf0173fa3040. 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/FRX452278133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a965339a3a37168cb8151542dcc93bc775df329d81640f8bdef94b6ee49cd3. 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/FRX282220797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b6ceff4ef9915109fdbd796da49781378693a7f86d71fa0fb664600e3069e6. 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/FRX202287080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4939e431f1e497a321721ed3a7f5caedc9eb5f3f60ff30ce0fec6b9b038244c3. 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/FRS182103082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d72028edb9bcb14a7d5e6a1568f7430256fa826f58836e793980d41b840a7b9. 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/FRX452129150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf4eed5516523b40241dd1b06adfe2a16f47053cc70ae53da1a7b672eb0f55a. 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/FRX282132400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29f8ad4dd81f4cdba5da4543c9e00820e832d6378742f7f14eed0a268a42c12. 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/FR59R2149478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e95fea0059c3e93a15e8ea30e88973ca65d89f85606e417957cbb4b2a604fc. 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/DGA052089487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb501ae2f0c3ac8f16708f24f0c8b1eda9b0316f75150415c8ee2f77f111a7cf6. 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/FRX282046958.