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 0xdcd2c0cade34beb8c8b46f4caa5838a4432c2a20a691de5aa550ffde42afbde9. 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/27e8a909-662a-4445-b026-04bf537234af.json and https://artists.proofprofile.net/proofs/artist/27e8a909-662a-4445-b026-04bf537234af.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 0xe9c75336ac8dfb4604a7ea05252ed07833945c87b03e129f9f4d5ea17b4be4db. 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/FR9W12115124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f83c0bad8adcb1e109410bf751459f55fd42a36c26441fcd1db13c6a1671606. 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/FR9W12133800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ef81661cada500e4e7f2348e9b5e77554d2cb545aeee5dc31680a9f88071c5. 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/FR9W12132957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4176e832dbd9019ca710873554a53ec37bf0454c2e3bf55096aa593f3206f24. 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/FR9W12132958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166a81d90827cc4e9cf31a8aed7d6c541245e544362cb1fa4e01bab76d10515a. 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/FR9W12132959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ea76feff1b1523c281dc6e33460ccaeef7aeed877beac36c04531bcbaa68c6. 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/FR9W12120067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984552c72a9d64cad89c814efacf80bb3f45be9dda07d5eab92183f659b0ec96. 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/FR9W12129248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5721d25ba094ac37ae962367d7dab335c2be0082413729ba0e373530ca96a0. 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/FR9W12132960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30788dcbea76692761f66f63790c741c1c94e247e486b25f026eb36ad272565. 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/FR9W12132961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fd2fa246f84f8a94eba260404bb0638251d55999b422192a296ef283e20d63. 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/FR9W12132962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a859325553a3e06a49d81743b3bd48a47b1967b64a3a8ba177305bbeacc11d. 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/FR9W12132963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaceab7f3b1fcae37e50ffac5808232298626e973b069d1a2ca481fd294577ee. 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/FR9W12132964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edbd7eba8570d5d09157ec7d1405887388cf8cc8e2358171ee2d2b5e7b0e6ee. 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/FR9W12132965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b5c72f534c9567c3bd10a0f7a2d3289ae725b2826cf1b107c53e52d81e5a1f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR9W12133801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec30e10e034a66a775e50bb0a67db14db12838d3f0f365b061146842b0a3481. 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/FR9W12016702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca74855779980b04c6d7201b9779bcdbcd6b94e2d91d0f07a317417e3b24bdb7. 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/CH6541968771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a901265e9a247901c83a69a4c3d95c2ee1b0bc0389d68a30810c4a9a93d8d16. 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/CH6541771801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c367dd5b35fe43fcad8e21faea2f8ca6ddf9ce505441e5cdd6e32e11b4d213. 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/CH6541786903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d0bde7c09fc482f8b71a07c8ad39822a7b4de4df0cb118f89a887454481a4d. 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/FRX281977813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb55731ab7ab6dbfaa5a4c2fe2ec792bcfe5d151be27e3460e22463eb448aff4. 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/FR10S2042916.