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 0x201771b594e907bbeaa562ee77efffd3e996b0e3285d4f64656adebbc1d6884a. 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/b890d5be-e999-4f47-95ea-13015870d4d7.json and https://artists.proofprofile.net/proofs/artist/b890d5be-e999-4f47-95ea-13015870d4d7.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 0x2814165b7455143e7ee5028f8f802deb9f81f09cdfdd0c3bca6597308feb0487. 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/TCAHP2368771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371fea2957f29de3be0e55653274474565be496411b78da3706ae6a9b233e190. 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/TCAHL2397596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a0644f269ee7b147f627928d303aacc933984777253f245281f4d010ad09df. 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/TCAHJ2366492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227e1201ff74c9471d208781bf68d4123db82445e0c122f9efbb63af83233cb1. 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/TCAHC2362778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798d23fc4f65108c52ed836cbdca4680dffbb605ca8a33019aa1de34e555ab81. 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/TCAGX2331884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6edb6075e88c9bd9c211baf30eee1c50607df5e23f447760b846401f6d09a4. 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/TCAGQ2266300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee97c542649b9e7fe16829442e8223e37c0ea163ae5db20f60690ca60d615d0e. 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/TCAGR2232484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c811049a95303c60b11540a951a79ae1190ed56ca76011403fa59ca1b8ad8e0. 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/DGA092364433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f908eba038710c0dacc219d9173f99fafefc25f26655e134ae57604e4b16a52. 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/DGA072317321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8978c4f888ce9a4fe8c4dc02324fa3ac8616eb82028896a306a53c81b0457e85. 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/DGA0R2309101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54483eef7d1f05be041a4f6a366ad146fd1d116176f0b003eb1735344dd2e1d. 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/DGA0L2322078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9835cf08662915f3a7113ee272ae0feb8a95094c5f4d5e6ffdbb2accccc2fe0b. 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/DGA0R2309102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec9f63d5937798619ac0d667e6d5e0e980c200f47a9585f6249fc15d10bb74. 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/DGA0P2390566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb144ead23ba06c0dac9493f17a6d03e5bc9b4d0a40c2d83bbf320db18207dc93. 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/DGA0R2309103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf337e79fd7d1c95c0de5f2ac1f22ce6f8aa5312e76ac4c5af2d5c6b760d6fd51. 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/DGA082356211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3568fff49b62488126afe26303b99ea30405ee12444587bd7b01826277a1d6e. 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/DGA0R2309104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d10dd6e616d77fcb198acada4a5973f0e0e537e930dd35b3618f1068155d02f. 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/DGA0R2309105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc978534bef1a3742f7cfbd58e0a1d41c30c1f39a556157825cf3a1bff1d95de0. 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/DGA0R2309106.