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 0xaeb000f36879a37f7b115746d71f8b0cc6857631add5bd836f67dcfa93ac5c42. 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/62534417-6648-4d8a-9bff-35753bca36b9.json and https://artists.proofprofile.net/proofs/artist/62534417-6648-4d8a-9bff-35753bca36b9.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 0x8d91e1d2a5e11e923922557db37364dd5211324a78cced5e6888a9c6907b9a9e. 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/QZDA52227334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b9bd41807e57fccd86f1d2b64a3354a982629cbfabe4d3de74ed10f3559afe. 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/NZPB12303766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28890c82c253fd86f5085beb4e41788a73874da09af856056a4259919bcc6aa8. 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/QZWFQ2305359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef3e86ef754e6efc575929179a35966143f9cdb5f0b4600cb8ec73f56b80b25. 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/NZPB12401370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2030c1ed1011d3d657e107ba75bf8bf084651d11c57f2d4b957a2e401a23a18a. 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/QZNJX2594048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577abc5829b7f3c933bad6855413514f4ebac68d534bebcf38d89bf4e0b6a24b. 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/NZPB12404116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27193b3d6ca5fade414645e4ddfc5fdd40f19c6480657521b390256e88bfbe03. 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/NZPB12501618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3551b21ea71a2ffd9404be4ac2fbdaef07ddcfde927d041d8f2213b9859c0c. 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/NZPB12404094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd6305110cf119d4f47973cdba96a5145c83ce8f653d402486c2a409aa72956. 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/NZRI12203023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0d39ebaba7e31fae932bed3f4f811765420c6974de58867b4d49f6e17ee766. 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/NZPB12200899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0581c035844fdf36db311acc0ace16bc98e4dc4816d22d96062716d2fae887. 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/QZNFJ2200219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c6d064840c60df3c1e4a7013ea5e388e7f48f95876d6a0fac096c4ff049aaa. 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/QZFZ32204452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8316318ef3e3d17f7c0530e73f994a2271bfc9a82dedd6c7493d8f2bb88a4f. 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/QZPLR2140354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d41808587b1344cd8151ee43db21ff0fa88f05b7c85d84b547a30ea2c17147. 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/QZPLR2140355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a19680e1e10a0d06aad4b48fd5fbfa8e2b1872120b608805d501931adb8e6e2. 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/QZPLR2140356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e65c970e7cb406fbf898446503a1cf9d131c1d8a889a28e5d0f756f73b3335d. 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/QZPLR2140357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d094b620a8108f8feda6f12549f0f6279fa00438449edc887f75ae4c7190284. 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/QZWFS2462920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3314860fc72f2972815a385dafa97fce4904980e06f8e9415c78d9ceb595bd7f. 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/QZNWQ2475572.