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 0x71b36c194f8e2393d73d2386a4e11cdc779660f9d4279ba95126facf6243b135. 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/f710a011-dce2-43a7-8859-87be507b2968.json and https://artists.proofprofile.net/proofs/artist/f710a011-dce2-43a7-8859-87be507b2968.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 0x7f8e5bb04bc3026b5f6600cdcccbe10782a2bafd0d0a799cfc0ae64a69c61f8a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFN2345696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12191362588a7c225531183310bbe229d127e333c7ebf20d3dfd6654fe42a436. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFN2345697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe992ec6ac2da33daee0893ce394abc51d775884918fdcf21413c1d2ee54ffc3b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFN2345698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941182c0ff9ca81d9c24835e19927d7e09f4d74da85aa701b1ac53b3c09ba5e6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFN2345699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0cdc6875719166d1216acdec36f777125a80bccfd4fb3c8c1ef844a749e29c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFN2345700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca2b9ed264cb1d71ee3617d8ea3bfd070a73f78097fbb4ac5d77bb6d0f695c0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFN2345701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36e445feca2437e2908cebd465a95226557b3fea419c17555d4e6b2f46c2cc5. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZWFN2345702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3694af4f1b54343b0feb30f15da9a1eda0e3860e438d848b8d41e714b315cb08. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFN2345703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399e43ce28c57f67db9d74d304e36f9a8dcc7e2dfa3ed4e81f5c5b6fef961ca5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFN2345704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8683ec4aa5bbb0099c04e0f6a9bc448700bafcbb85532cacdea22ffec059565. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFN2345705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c2f26115b225f86899a5185a9f371abd310d3ac4b25b68e6c659ed58ed5a4c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFN2345707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0198f7e00cabaa7cd73a710b6afdabe8fcc0b793c4d15371b18f9af515f44141. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZWFN2345708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86968382fd1a7a833641c9b4085b2cd3a699328e25c1e57953331645b4dfdaad. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZWFN2345709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55571369ce2ae0318aa5c2214c0116fca9ee211230085437b91ff43622ea3d2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFN2345710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd915aedbb82a32b019f20c48485019acf84947ae48f3be122bb812430eed1baf. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWFN2345711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87545be0688dca08ab58d0d858121d4d602b09d7315f1005d27afb71cc85fe50. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZWFN2345712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d1a9551ba6bdb79731330300c668703fba1e44973dac83eb0ee1d5f06c58ac. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFN2345713.