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 0x2f6fc39070c348a20f596f68127c3f3e31f74863c6dba3d70445978543ba8abe. 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/bfa1081c-280b-4f35-9b16-24621e9f3ceb.json and https://artists.proofprofile.net/proofs/artist/bfa1081c-280b-4f35-9b16-24621e9f3ceb.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 0xd3a2ebf65de3ddddc41babb5edc57645be76917eb29a91e74c4277e9e50d1500. 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/FRPI62300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43315ad26d79b7a03e6aa470316616cd0f956be656bd5a77cc09742229183eb. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FRPI62300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11fdbe4ebd221e17980f0461abfb83b6fa5627d51ecd47f57e300410b7ec5ce. 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/FRPI62300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6437a6048204e05ba81581854b3b30d32e5d52c6d7317778dd39981ab6dc519. 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/FRPI62300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d1a17c1e6ccad40db5356039c35bd738c4b7f078df194984c5e3abd0596a2d. 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/FRPI62300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd82999c6364dfe0d532a32c197e5b5771194561f87444060a7ba81c1ad6d69. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FRPI62300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01668024fad8635fee84d83e9f3bb8bc8bfd276a0c9419dc3c996a30a57966f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRPI62300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d1a17c1e6ccad40db5356039c35bd738c4b7f078df194984c5e3abd0596a2d. 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/FRPI62300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6437a6048204e05ba81581854b3b30d32e5d52c6d7317778dd39981ab6dc519. 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/FRPI62300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e90ff62609fcb4e89f754b8e99b1e04babbf8cf6a4c1f0e61505781882faec0. 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/QZDA62294840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cd0cc548f47ea8b5a9c69bc638556039aa1c41b94a41a61a969408c47601fa. 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/FRPI62300380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc128f088488964518a8c2021c526e903acd98d55bd6b8ecb549a83bd8e603150. 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/FRPI62300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0457e7ec57bafc80775d65394d849e595fe819643e37d59fccdcc00dd7b40aef. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRPI62300630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2c48f801d9d68486a27cc36e47685f1fc5beca88e6fa02834b7f0e8009a0a6. 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/FRPI62300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb465d09c12b927f3aa4a01152f3d42b1c0a7fb7872451aae41ac4519330203ab. 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/FRPI62300470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91301737da537fd6ac06ed6dca12284ad032e2044f7c3e9c5bd3e781b698f8fa. 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/FRPI62300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9250ff27e724a067115c935949edb4bfbff79e62eb9168a0d6f6d516d57698. 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/FRPI62300460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542c5918b7385fe6cf1f18a6a1f26e69f4e0209ebbac82e8185493eaa9447fc5. 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/FRPI62300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f67ac1ebee04ab333783b5a9a35acb09317036850ad959f76c01ff1e8d74841. 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/FRPI62300400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba82b505969ebf241cd69c3627aa680a4c8ecb4e1651104cbc828436f8831a8. 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/FRPI62300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f2e5f03c447dbaab37b8f28255e28a4508630b905c6c4eed1b83d254cf5007. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRPI62300490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a454ae1130a9203f191d62504c48c3d499befd76485dc242ff302ef604fb047. 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/FRPI62300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d376a302886c22be8d07b65bf7a4fac424bddbe17657c7e87ca33a468631b4. 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/FRPI62300420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30c5b8e9a9b05282d85323fdc7682eb6d4b57750b47ce7a9556bce228d74c08. 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/FRPI62300500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0ae7bb01d0e7bf3dc74136d91a8e593e39b9b100bc7e7ccd159c0a07eba56a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12115641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a6f7793405f5e029fc65444c01db362b8076957f979d7a48805e710bfbd457. 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/FR9W12115642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1f83cec8e43acfaa6bb6194344158a19b8a1ae276ccdec9193292315f347eb. 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/FR9W12115643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635ef4eba722e9862fa5b8dd1a0c50118e2d3806b66a850edfe7a5660ddf4a43. 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/FR9W12115644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c16088de59db3f007f142259c8f422fa7bd09017532ba5c450e2963d1120dcf. 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/FR9W12115645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e65ae9812ff3b6e5f065ec029f0d935f587287bf6129f9c8a49308f7c875cf. 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/FR9W12115646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a03e775cf7043416ae9c0896e92417522e303bcd0537588da5f0d9d398d40ee. 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/FR9W12115647.
une histoire de persil (bande originale du film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58e300197de207f8304c421d718fd4d942205ed7c6ef6e2c4b4909959350e67. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZK6Q2320075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c3812404340b4b27f2cb0a55370558205a3d0c7d0c7e4df139db0eca980fba. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZHN52213788.