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 0x567c616b6ba983a8df07378608889941b7ed74f889ebcf0a6557d7b211f3e94e. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99a1bfbf-0590-418a-b223-5d41c9ad24cc.json and https://artists.proofprofile.net/proofs/artist/99a1bfbf-0590-418a-b223-5d41c9ad24cc.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 0xf1728862215cd53a20a12870697d47d233ed9279ed4896516e25a6723983ff21. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR9W11730478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35fc3287357cfca13f157a6704b0ae8acc361c64ec74ef6656aa136812b46bf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W11730479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53290f4426cc599b9234258c692867d4b54550091179b89aeba9b1e1c6518d4. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FR9W11730480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc44a4facf84085cd9224333d15fdc27ec7f80b0a9280adb8616add110f9e8a. 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/FR9W11730481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9a0da36cf4a7639b3f6dc9594704b43c9457e4e7b50fd3f57032487de9f982. 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/FR9W11730482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99de71e6422975fb7bf323c666b3458b115d99df40a5a5d0bbaa538c7655b66a. 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/FR9W11730486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f8e2e0f997aa8f222271102a43787a32aed6df29301dfe0e0933a7daa8a112. 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/FR9W11730484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f74f85da0443a8c93d94ed45cf16247d7aac67fa0178b7e63a3afb6e9168d7. 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/FR9W11730485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849309d4c7cb87d427f3d70d9be3406acfd559210a45b4df20979ab4fd5b7ce5. 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/FR12Q1200662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eeae888fc05039534b7d187f37aa3c629f1f83453ba2bde955ae14ac849b50a. 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/ITO0P0601313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef797092c2720548b89e3ee8fca88c63cec3fa560b803743add91b50b9f83087. 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/ITO0P0300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1e82f3b3e83f125677d601470326ac1dcd20d29e4d0369913e208b82cc41f3. 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/FR12Q1200666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444ed41d63fa65f06d7041a8e71009bf6c02b7100a4d3dd13b39297be5c40e64. 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/ITO0P0601147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d07c5b326b172d544808322ad1daac1e9982f05b9af0d62408927b438a6900. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITO0P0401103.
Gérard Pierron chante Gaston Couté (Rétrospective 1977-2008)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5049b41105cadf00581193785eaa920bc4b64fca380db24eece71f4f857d028. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRX191601748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544de68387d3fd3a4dd2491e7f9db1ec1440959a9c8a4a2c75dfd511e6136a43. 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/FRX191601732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464b23b38d9e0e1904e234fe836243d8ead4bb52931c344ee4901629d4c06f28. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR12Q0900351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce112ed8946abda505cd5575d4fbcdccdb471355d7b884a22746cf5b3529260. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/FR12Q0800342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469f28daaef67d783277c16a69863c468989ccf6a1ba85103469c4e336776c4c. 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/FR12Q1500840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25271a97d33ec66283b5db9bbe74e72adc9ed8d6afd3ea8e39215c55fe4e769e. 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/NOFHH2259614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb996a1adc8d65e1fb531562f66e747d33d7c8f87e5b748ef3535dbf68a97fd83. 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/FR8E71604820.
Tribute to Hammond Made In France (Vol. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30afd38f0ffa22c4cd2920563c90e86ec3335364208deeda4558319351a25b15. 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/FRE7Y2400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f35180e66d280a5905715c6a597efc77824ddeb127eec99d214c6a5f7e3bf1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FRE7Y2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa2ecaee547d8d891e1b6fcf3c1bca0443116ba75cc233da42b141cdfe372ce. 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/FRE7Y2400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d08ee82f9062c996e20587b61448a8a2f82a2c8ba4825e4c80d13f62e48284. 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/FRE7Y2400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0529f4950f02593d608da5b7975bf767edd1a62dd31badf2b03a0768854ccee. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRE7Y2400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c67f0eb6d765c39e1398270dcc14cd26cf46ec597018e0d9ef986a5d19c1da. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRE7Y2400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917019472457d6a75e5f2060a94fe9317d694a1a45cc348355f475c8a06a2231. 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/FRE7Y2400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781019fcca49ca5124f1c8daca07bb332bf1e5e3b6538863f8dee085e013277b. 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/FRE7Y2400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20a93635f96f40208e16e3dfd8a6e593d04bfcfdc272c5364983332096db30c. 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/FRE7Y2400280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913d47f304f9c93a451bd6678c7934ea740e1f464f7b7fa769639a5f8bb82937. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRE7Y2400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f3b8ea192bddc119f1330b046f0f6cf3659f12a6f7a52f19bdf73b6df5507e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRE7Y2400300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9d2d943d73af8eed0f70c6261015e0d1ea91dbab7228477ff8967565a4a31b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRE7Y2400310.