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 0xc88d8a129b66be6a91ebd5ffde01b5006c6ea1e3a69c1a324ed5ebc47eb4fd86. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e68cf012-5902-4567-949e-e1d7e770a6d2.json and https://artists.proofprofile.net/proofs/artist/e68cf012-5902-4567-949e-e1d7e770a6d2.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 0x69348fce09e4639c264bca1b7c4cc0382bd04d1292a3aa03fb3f827bd8234b0d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUAC61200221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9963907d46df2739aaefa1c8bb96b6c9ec0e84921d8e84d5f9752df69d152312. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUAC61200222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fd26e53215af07b11b143c184f7e1559eb51bed55e0d1b5485ce4a606cb74d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUAC61200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176cdf03ba327164a3c2f99bb5d18356ff43980e474a10d09d74f891b05d920b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HUAC61200224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69657cb4ec77cf145ef49a60ebf5f3f8134add285781f492c1d6ad5c5445e66b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUAC61200225.
Nézz rám (duett Bordás Barbarával) - The Prayer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e015681fb1e0c7056f6d6618380e9f9b4ebf4778653d199929a69e6526760ad. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HUAC61200231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185dcdeacce0af2dad627e7f6d2393d4a8f9b02e5abbf6ad6a41fccdbda5b4b0. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/HUAC60800447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19b799dcce65e078803eead2033e506e6cb2a549518caea390dea061049e2b1. 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/HUAC60800448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1955fc302e2721d3d9436e14ad7b48f849686c2d44e45bc754fc54356df04935. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUAC60800449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9074035ce24d1ee8e0c80db6a50bca32973fc3c0c0a91f9ff0240d499feb88b1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/HUAC60800450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe64de2fad94ea5178735d09dfa149f5e59bba595c40b8d3250009e49040002. 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/HUAC60800451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ce5bd466735e0a6bdde1a87bb3c6a1c0f83a8a33be9aa0648db301bfcaa2a6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUAC60800452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd838ee04042b815c823c7db447fa3ab607a7af1386ff9591766a58ee2029dce1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HUAC60800454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b253546245ca9683f6f01d6a953c3f5c5a0f10ae31221f73623ae84e59ee2f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/HUAC60800455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bfad5a7d7c52bdc9dae2b73eab4875d4a7d5ce0668fa3bcc7d19578a960083. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HUAC60800456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5904040987891c76179d58d0daee2e3354aedece2a0522d1c771f38aae8bf72f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUAC60800457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbe4d3ebd83f270cf3dec73060fa8c3ec24d10c57124d8d131dfef163016950. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HUAC60800458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a8d21fbbf6e0ea37e885bb8a501586c1f53459cf6412a172d930adceab40c0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUAC60900122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7051a2704d2231bfdb6979aae8eb8b0be44721de7580d9b719e8ed573f8d9e4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HUAC60900123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdacb2b53181b66059c76a909916b8d765590c334edef387b1f9037cd852cad. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/HUAC60900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99b81ef9e6f11f16316916fbb6594bfe6b697fbd1e531e2b60e96b99ca8954e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HUAC60900126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0952af1eea6cbd1c3f0a90eed0134aacb27104a2dcff91749fce05782430ee48. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HUAC60900128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecb91a405b252d035c6e7e91027aeda65a7c4d3f6d86ce66a85e522a5166cbd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUAC60900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c9281ad22ef950701582fc5b88c40ba11a51ee036fbd175196c90d07f8a0ce. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HUAC60900132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b93e635f8d91c8be9d443551a378701ff2599c54d95190888a42b5d49b53d03. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUAC60900137.