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 0xd7a6f765a846b08313fb363a2978d0ff76be57dffe1337f702779ba64cda4ffc. 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/e78f1614-6fbd-4453-b3e9-51ebd3d5190f.json and https://artists.proofprofile.net/proofs/artist/e78f1614-6fbd-4453-b3e9-51ebd3d5190f.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 0xc89e3e3f416f88b711e3707a1c6f35b77966e467ed6eab21d5552dc664f28ed5. 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/QZTV32492380.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fee0f6cf4fba52d7c7b16871732988bf7eb674ead5f4040fd42d7b9ab2c6873. 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/IEJZF2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bd06fabd70c74088c0d4af6b5b30ba5e56a7776c4bad321f2e145c797de598. 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/IEJZF2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f72fd18e2f3b363c406d732f3f199fb2e9ba2ed4c56eabf0d40bb3a0ebf0e00. 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/IEACJ2300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cfa1d3616d7a26007c5b5cf68bb97cdbc8f9c8aa799b8cf139a2f6b9b4ea3e. 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/IEJZF2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdd81db4bf0cc7a956c381615ece1e6b9fb65f1a5f77c716e83d41dbf023b46. 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/IEJZF2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62eb81de44a91364d76d4881c440d69638a14a80b77fca66e7408398dcf26e73. 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/IEJZF2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598bc33949debd1fe2792a97c37f722d513f0c3a11d355302c89bbe0b54b9cdb. 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/IEJZF2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4dbfab5c0038d66ed3ef895f4df940d9ae59c7e55dfedc1319d783d95e2e0b. 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/IEJZF2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7089ee93a9a2aaab32e3e9b882132e6ab340a4da2161985ea7daa813c9ef4a63. 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/IEJZF2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c36f3ed4f7582e32ea55d6390132aa982b3bdbd386805be546b2ed67719f7a. 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/IEJZF2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a5d077fc7e95ee9bdcaa42717f7ce0b980191151376d5167201062952b1042. 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/IEJZF2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222e092d24781e9f2034e2b899ff89505bf191f149f6645e17a6ab3e6d28e540. 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/IEJZF2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9145edaa13463d5211db30d69e48cc7e39466ebaf98e105ea2b4d76b3ce354f4. 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/UK4ZF2100334.