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 0x95d7536c584ad1e9131d0f6b43f4882949340557da391039bb3929e2ebd9beca. 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/fc801bbf-b40e-404c-acd3-f4bcb2f50a31.json and https://artists.proofprofile.net/proofs/artist/fc801bbf-b40e-404c-acd3-f4bcb2f50a31.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 0x300b04e4e98e65483c86aeb65c771a20dff6796a914801a82200f5c142f6c35e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBF2312187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57afb76e227a6bc29d79c421397cef87d7c262402d180ca177d4d2d36f2514ab. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZTBF2381441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebac3914a79a5550e5eb7d8bfe172955628d09f862b7c58c36196433fd364d88. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZFYY2497049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f718775e2a2ec1d156b81aff542d610ff8c4e78276a082afa866fd467393ae7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAS2424931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd311f883cebc03efa281283c217cbe01d846ce4c60b3afcd49819bb04bdd7dfc. 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/QZTB62449974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68781be378a9057d9997250ca410664d9af5df8925a66bcc29768bc801351752. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBD2444165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b461a5f29bd1ce2ab1a6af2ce906687b57f2aea37fe523a6259f201e9ca09ba. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTBC2485851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ee454742bb8e0cbb37a16c996f2bf3455117601beee74e00ab2e74506db4a9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7K2488285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6fef7c382ea5f70cacfcdf208f03452c906fdcdc40a4857f0a980d5f1fe89c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZZ7K2488286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf0592be72700c61c2901780bb3009154d5e1225da46a50c72c71962745556d. 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/QZZ7K2488287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a422b8a907286742fc5c51ab81419635d1262c16a59796c27c98e16f2f1476. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7K2488288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b342fb9587cd795b59f6a59afe27e0961be38f07eb189489aeb1c42f5080033. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7K2488289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d738faee4e96776245343ac59947c11569a5109f95b5eaaed28b4071ea0063. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7K2488290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04291c7d34e64c015b5a30402ebe42f63ce3a005a9054b95d02abdfa0b7c220f. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZZ7K2488291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fac99904dd545be548d2294349ddc531e0036d2b844f4597509c7ae0103538e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN32590738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e240a7a4c271ddd765a64285533ab93e9ba43efabb8a2087e6b448f6107a6df. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMEM2569419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14144b4ca6ab8ebea372fe50c729e6054c93bcd8708a7d8596d9e2c0ad383895. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEM2569420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3332c334d6d0165dd0cb0540777f82de865b7fb7fd9b73e5ae5be9bd8cdbd2f3. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZMEM2569421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17421a295a3a7e9f63f62b24c24d1a017cd074ec7ae6880b32763ae0733eb9f7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEM2569422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b27be26a57213b8becbb3b856122bc9d3a1d9a14d8c8aafa633399f2f453d03. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEM2569423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4725407f8b61843483e146908bc2d3d3dcdbb46bcf6749f30e570651d4d83498. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMEM2569424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8be7ad542f2e6e17dbfb31fbf63b8f967c7f974076d54531d275de788b030ff. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEM2569426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6322f21e60b6315119998978ccb7842afd3923ee7d9dcdb2cc8c87bd08577c9e. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZMEM2569427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cb768907a88edd2aff75017f277d93a1d4ee00501a91d3f1d88c9c6f62a1d7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEM2569428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9424b26319f54acb14c471528f09c5c19ff4c189f86c1e5dec584cda22f1e09e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZMEM2569429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd2c1e451cf7721a8a4fbb1cdc8cf482fdb0e3e4f3c35e4b37aa80938e08645. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZMEM2569430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ec5056c3a0112a4d72b3d69d3911d92bd527e9b70c57c831cd78be62575d43. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZRP52574643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fce2bfca3632d50e773149cc83f50a2cba46b3c0eeb364e276948b109a10f4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZRP52574644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342a1d6088fce875f253b855a8f4b32153a67060f94177265b110d96bd4b49f2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZRP52574645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c1828ad21b7106d33caff05d4c80e784b62e67544055b19ff6c64feb3f5cdb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZRP52574646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6aa2981b76b7c3aa60e5675aa9ff29939f4e2415cae3ec04e67f00a7c1be42. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZRP52574647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc095ff69ee49e9fcab88654662152a1051801c877796021e84931e34011bf5df. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QT6EF2579451.