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 0x67e563d053bf8d64fb47568f4823bab933377cae290a04767c1761181405fea9. 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/d34e3fb4-70c4-42bc-9367-d1aa67e8693c.json and https://artists.proofprofile.net/proofs/artist/d34e3fb4-70c4-42bc-9367-d1aa67e8693c.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 0xe7bfda2e2f51f445422d5b0dd4723fc4fa45fbbfce171b689b9a86ff0bab9ace. 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/SE5BU1968995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d5d2b976d01f660d0f34d0a73ead9dbc3d76f3fb742a020ed0474d8715c81c. 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/SE6QE2091674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe6fc2d84a442ec1b88d8956e4a91f297832006fdcdf43a2534982f887a0805. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6HN2146626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f1baf421dfc246c868101e60105c452be3e8a3da5fe3ad9ffa2097b78cf83c. 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/SE6HN2146625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954ca6157f52978e5d707fc1839c39911793bb9271a388727210979a64fe8321. 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/SE6HN2146623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ca8f18dcda7a4bb0684700a16e2aa6dd0f0eb451dc83235c694a30516148a2. 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/SE6HN2146622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da130c2af77652428c73516d8da93d355d019b5478a6b013718a3d1557e937f. 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/SE6HN2146624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb213444c0d56680aec5c2f1b20dab2a18263f422ed3352f937f96b96aa4d05cd. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/SE5752200778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171e60557fdc5fc3b37168b02ab1104fb74e7bbd26f576dd66d66554fbc99d26. 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/SE6HN2222485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cce353607156369c88650aea2170187aaf30660ee66441965c11c7de039d62a. 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/SE6TI2399573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1bb62d344d490c8b0d91c61178e0c545bea9725006327394c40cbc5d901249. 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/TCAHX2469765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c43017c27220933e1aeaf3ea9e26a1b37a486572c4a7d559b1a4319e2ff2ea. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTAW2484897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc9d3e5476e73470ee36d1fbcb448f7b01a09d9ed2e792780c966ed759ff2a7. 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/QZNWQ2409796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d04b975effd941d62380c723a6b8cec497af6546b2524f59cb6704d6cf8e478. 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/QZNWQ2409797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b2e4d23591adb01ef14de79d80dd77b37f0620824c4f1df667c7cf0c8f5d35. 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/QZNWQ2409798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632029da03e3a2e1f71fbf71c00dd7195e816eb9062ba97549a8597ef0f05e3c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWQ2409799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e4fb0fc6ee13d935ac9e0d876f6e83b6f19df06a6c1fd2f1b304fb59985a1c. 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/QZMEP2478848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e4fb0fc6ee13d935ac9e0d876f6e83b6f19df06a6c1fd2f1b304fb59985a1c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEP2478848.