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 0xda440684bbc026fb5839478ee4085899b24561d5a6c18026eb1af95e6cb5b6eb. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7d0b918-b217-4771-8b65-dc65fa2ef9c7.json and https://artists.proofprofile.net/proofs/artist/f7d0b918-b217-4771-8b65-dc65fa2ef9c7.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 0x8f9b7e7250398d1b40f40b24c72c7920a29db08b9fdca18a4d7779d18e024b46. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZNWX2173068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793e018b326af815ca2500fa52d6b4aad703780cb7ac906ed303216b1e03b55c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZFZ72235148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb824d4d37993906016bc9eb699b0d1f346253cff140b654e82e7d7c33bda779. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZES52232211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece35a825d1d65d852f572fdd32f585e2d1a4ced690680310ce2abac8660e61a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWX2296327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e3c4ed109f9b3d99a4aed86667e47ee058a3df09ac1d7b1b7d429f7ac02fa7. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZTAT2204048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c14f184e6903c3a5642b91325b86b4a2f4a48a1e2e8394ff487679a9127da99. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFYZ2369830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaba412d2d2e8406fb5eaa3d1c93e5cc3d646ea37697b130efb3d4ab0a8b6025. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMEM2319034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8bce7646284567972a1e04817d8e19ffb0dd484e9f14d5ba9a95a8797a9c77. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZRP52315429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f7229fc2b68f27a542414a1f352211b276db768ea2663a5a16044213505580. 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/FRX282432432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4f81416034c8f1fc2f2e85e09c49e1a484efc54081c1a74bd2c2e804220e75. 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/FRX282432433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2a1d188301772346f1ebfc4324564a537ba58ca7e6533bb40a343aadecf656. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FRX282432435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca04c28365d50a0040d68aead66b72271b94f3fd45d3919483a1cf1d37826294. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHN92539794.
CACHEZ-VOUS ON SORT (NOUVEL EP DISPONIBLE EN SEPTEMBRE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4724972ae55b2283f36d18188f4c64d4d57bfe3106552cb1899f1f49101cfa9. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZWFJ2590940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ebcab1bd3263747e5aea81437a8b54a517b4d0e410deb58345d4b5790a52dd. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/CIA2K2500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2cb4af998537d42431b16f1a633735b22072f724f49083845886ff8bc2890f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CIA2K2500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f63c8513177482d216a8ce3d29218cfc509ec616392d088d4b047407213b600. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GNAOF2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87c2e432a34318e1933d7b06c92249ec635c0f3b197efe7b08fe67f06592187. 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/GNAOF2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd743f39b52471188bba2f66ec75f7fcd3cf9dfa1bd8c5fd96da8e5ee93c728b1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GNAOF2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fdf8bbd4d6e9af4f7d3cbdc92f8e4a84fb61458b801c33e4d9edebeceff94c. 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/GNAOF2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4971a931aaaa77230bf4086bc4aeab70c54e8e978f2ad2d1e91114edb97def70. 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/GNAOF2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810ddfdbdb6b6204d6560af220e37ba15256140f769afabdca0ede7ca2412c3f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GNAOF2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0f1d398ff0f4e6ef5a2f490308f309fd55629f46c2f44546309e56706dfcae. 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/GNA0F2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf30fdd795eb894fd0e0d78bfb59997cc9eeea07f8cf293803399fe140400aff. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GNAOF2500008.