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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd773b919ed226146e2cdd27e12fbfdcb9da4aeca663e37bba6daca1513a82b1f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/419f8d60-2d45-47aa-b6cf-6dfff4c18e33.json and https://artists.proofprofile.net/proofs/artist/419f8d60-2d45-47aa-b6cf-6dfff4c18e33.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2af01e460371bf134f1a4b4b7f6dfae942996573254becfdbf8c8acbbb01cc0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:28:17Z), 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/QZFZ62539661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c6cdbe9c652d2a40b0699757dfcb9a4657e26b3bbf507fa973f024384fdc44. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFZ62539662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a24e889148a30574b48c9f6cee482aeebb06bb12f7fbd6f38f4e1e9c3d3aff. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ62539663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f213201f36c3a387c61b819983f3d49d5f77f8b613cc647185286f54e1c960. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ62539664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc7c1f3ae7db276c287892a72d84b80fca347c5cbbfb8b048c19fba7e72ef35. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ62539669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb999c367bdb3cef18a2da62b36ca672c19d383bdddf2d841051273dc932b4314. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:32Z), 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/QZDA82529791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e83bab6648e67364fd414ea1921f70542ad3a5c5b3df2964260a43506865aa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDA82529792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b2716e8b7c23dca1af01453f46a975902e1a39cc122cefb88986d11d6a3726. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA82529793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d23f6a5f0fdee72eee8814f774fad38d4cb41a9a53f6c9a7ed65ba0e0c6b656. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZDA82529794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ef8c0e814270bc90637667b868d3d0852bb163055841d4f0680ac1061243a9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA82529795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fee27683032bed903378661d6a5290d949e92b0ceeaf5896b186a87fb316d6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:11:57Z), 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/QZDA82529796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb311cad54cd883635263ba15db6f151e75c2147a49ced34037e4087ac08ab5dc. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:28:19Z), 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/QZDA82529798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fc1cb5fd92650e552b0202edcd78505634b1109e88696cc171026f0d35d595. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:03:01Z), 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/QZDA82529799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9804ec0bf4e1a7175687e37dcce06368c0f57de1432fc205c6ff9daeb62ed7eb. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZES92597115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfa09f993d2ad42575501c67b3b90d501a6ad8ca43b1e16a8dcb07ab86a17fe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES92597116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a91f4d54f588fb9ceee72484dd698057c6cd5e0ffc0b6b61213eee350c90ee. 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/QZES92597121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6c348abdcda8c6fc121059a9dab2da79f7ffb86abc4f582bab99ee90135b61. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:59:55Z), 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/QZRP42564000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bf4a8b5d391e0fdc4833afe9cf76062205987460e0464f6919b8390b2b5c38. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:29:24Z), 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/QZTAZ2595303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9325d4cab200c4bbdbcb0048a6073ded8cff8ce1b51947dec1852582a1fe33. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:32:37Z), 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/QZZ7T2588761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d17bf2555676f445699f314ed25d0def164bb7957eab3b1f6afbac41f741c5c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3FG2527834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de1d6bcc1dc8fadbdde1403da6fae0cd4f8ef25743847b75a15177c5c819f12. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3FG2527836.