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 0x7fb73bbcdb6884215d4eac3aa38a6a10c5253fbbc9fb2776bb7317cef4b85dcd. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/528fd4a0-e80c-4184-aade-bf6aeb5637cf.json and https://artists.proofprofile.net/proofs/artist/528fd4a0-e80c-4184-aade-bf6aeb5637cf.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 0xfa4a0eaecbdadc3781b82bea044bb097707e0ebb6349c93ddb1a90e15f191b37. 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/FRX202086663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d40ff38942dbb0c882832bd14ab985bb40889dc93119dd9261f19cf0940c517. 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/FRX282033111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2a662e5ce148b6479afa2ef427efb7689b72a4582773f48b727f948a37b29d. 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/FRX282033112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b009376fbe8c33d96ef3882ff9c9eb97b89e3a1a198fdf5755cdcd68d8bf221. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FRX282033113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e08b0cdc822f87bb2bf6d4f4ab246bb3c8e872d7b14959977b71ea6e0ea3be. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FRX282033114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2654cbdf51ad13b6bf115588647629e5fd3618b011bafbb2b6b3efc619d6e1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRX282033115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a939cd6288290ae2293ecc688c0db6386b07b99da3ddfd3153cb4f187b444e. 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/FRX282033116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef84a6a3c762e071300eaa9420181a548b17ce6bd1d6adb2253e01b37afbc9f. 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/FRX282033117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeddfe20f7e04c534b8f3a18baa3a331bb8e92e6e6b3610589fbd82ae55646d1. 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/FRX282033118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16af5f993de99fd0d44388b987c4c3f829d47c417aa05fae206534f6db69aa2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CH7812363046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6410688e6c9e2bfa479df5223784343c8bbed25b91f39c13e587192fa5375de. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7811503987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88533e5219bd310e5f407e458dec8c22fd6316b8ed9c8c94df75f877ff042a78. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CH7811819934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaa71cc9efd13868065058afeec73cd19c4ce788435d076c90bf6020001c5eb. 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/CH7811819935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420ce6dcc16db2d82022b48d823f4b1cb598c6bd08d67f3558d0e9eb8a0d6519. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH7811819936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c11397a3fd8c4ccc8ed39e86baa570d354daa1d041970640bf2e2f8fcd7f8fd. 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/CH7811819937.
In Züri gahts ab (feat. Ruff, Limmitt & Jordan Parat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fa41c2a08d269d5f52bb6d11b0153a182ccbfa935d55f749ebba50dd3b78cb. 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/CH7811819938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700d4d175a61bdf37bb5394d527967de4edca982d88fb2ab2a3969399a506ae8. 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/CH7811819939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bed0a420afeb1d589b0cc84860ca4c4a58b082d1eb4f0db1e3ec93bd8615e9f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH7811819940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048efedb2848f814b6ea66dfd5ca23dad069947a2a3a162984303a51522b889e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/CH7811819942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9e262f252cf44e89244491327fc6dc630274568d1ba41953dd6abfbf586fee. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZDA71941236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a5ec52a8ae38909d891577622ddbc1af0f4ce4a39c419835673177355796a2. 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/QZDA71941237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61a7294f8bbe9e3f04d6e3f7bccb9f3a77f1f8cce7beeed147f4256c60115c9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZDA71941240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3764516abbd7ceb83a2cdfec0cf0cb2b76cff15a2820784584f04acfac42c34b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZDA71941247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb67e73e50dc7f986d73515ed7b9415242f45157dc2ec2f0755a9c98c4773e4d. 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/QZDA71941250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4178dc87c85c43451c37f957f51d1005039f153bf7cc3deb2013558fedc3062e. 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/QZFYX2072711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80643b7599bfb3b1d007b6e7e71520be5856eb626ccae1ae0b5ec728635137f. 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/QZFYX2072715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1b86f0cd8aa67507e9d79b076d298687c8e97a8e79ddb2b2164035d897264c. 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/QZFYX2072716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82ed81c4f77faea5d414bcac52114b1a8f9ce09d82d9fb4396cd7315c97bede. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CH7812412554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10c871f81cfdc47234e094f9ad13f88371cd952aa6cfe4a23f90229f53f62dd. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZES81951067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8950ee8d306c6f244504f94495519e638c655d6780242ecbdd0520007ef4d5d2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH6540879733.