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 0xf787812d7a2e0ba7905ad4b3cefe3ef264d9f42018ee09f92b69f09df281ef9b. 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/e6fb3a50-6a2e-495c-9620-e9c4fe40814a.json and https://artists.proofprofile.net/proofs/artist/e6fb3a50-6a2e-495c-9620-e9c4fe40814a.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 0x47b343276a46f9ef01b803af46b3730877c44d8e5803249f1489d89401acf4e4. 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/DEH742440945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2e4ab162cdd44b967181e164dfd3cb8ffdb2439b676f90f954a461a6734cbe. 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/DEH742433960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6e5b87c628a27fbfae561c6ba05c316e26a1a5ea8518e8f3a0366bef3256bf. 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/DEH742432064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90ba838a932ad19cd95620836198dd6d867a01cbdfe2ee20b42e9ff96b3cdc4. 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/DEH742432051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f0088ce2504f1d0f13e58eb0d64636a5c4d913d2099b54de2af2e8298db960. 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/DEH742423011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e7e3659cdbcb3015afdc325aeedcf26b7d9eb1037313ae85b0dbd8eaafcc3a. 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/DEH742422515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39a7e5f9549771fa97c3fde040d8eba708ebd9290ce6ebfddd551c8ec3b78c0. 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/DEH742418233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece360d190848c0aa1532383520393d27daa648bb60f9c91cd23c44f25004294. 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/DEH742407337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0ec7cb9556ee01b5d9b219e34a1e17c1b3f322677ef3a338b8db3bc61b3b41. 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/DEH742406050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd8fcc3c498c2dad7a01d66a313eb5173f66d144b9ee4e5364ee01a6b78956b. 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/DEH742335887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8b723277c431bf2fd3fe5e8a46aa2584ddfec96547e4914401c7c7ce36864c. 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/DEH742327826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa17c267268845d46a798754df6a4dc5a40696c315a23ced093a64dfc31ef6a. 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/QZTB22331144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5998ded8b8ddcb622758c7b5ad431ae275f532c9e4a277e174bc8c99abfc36. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM3DF2277848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacce9b150e428f5d53d3b8ba256a05f402dbec507e96aa74cc44a0c349a3e6d2. 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/QZPLS2363733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76034489bf6bef4338d7fea3223ebafa15ef87d6664b9148031994c5e9bf0299. 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/QZNWR2343304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8607b4aeb8b86fb34a93bd823d0a2ee11da7b4f28117b6d76042ff578ee86ef6. 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/QM3DF2202902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c6936dd43867e2506bb8b58e529fc5af556b18f95d6e2e3c743080119407f8. 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/USANG2255122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5ecf5311cd1c97c11cce696edbd84178885d0198054909acd1014b63c18ad5. 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/USANG2245038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83403e01fc3dc570063eaeb703170babf9d343b683d218b3aeacfeecd75fc829. 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/USANG2237292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890eda3a2acda8e6b35a1088b4e69fe3b2dcce9b35e5dfb3a277edf22680c7fb. 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/QZPJ32202202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd906d57ec2d4a86df0fb2ad7d0529bb064c24e82dfa960573cafb20e60bdf1. 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/QZPJ32199065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c862cb3ce6085f89a043be4c08c178d83ce701cbf76e222c3b32682766160a. 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/USANG2487839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d315e760293080645250b2552fb5ba69b62702ab4c4e28ec687c50ed643962. 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/QZPJ32167593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebd674716935e8651c5cf3e478f2591d4023161b36d7913c8f481cca03799dd. 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/QZPJ32167596.
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