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 0x76523811cdebce3e3999a26d568fdc1b9110d6a8a52589b8c18fcae0bf37f165. 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/9f8fb2a1-fda3-4904-8acb-6c3276dce637.json and https://artists.proofprofile.net/proofs/artist/9f8fb2a1-fda3-4904-8acb-6c3276dce637.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pourquoi certains arbres sont si grands ?
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 0x5783324bcfb56112024c3ab077b13cb90d84df09cb5cc8bf0235eb416adbd008. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR9W12327202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb1ccb54ad256e33ddc52da39068feae2fe2014d28a8a00851dff3ef8992b03. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR9W12327203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f902c0f61f15e4e932606406627bd6fedb963e98d9bb1d316760989b3f0edb. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR9W12327204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f7543a545e4ac9cd577c5eee06bd56e6510d7546961d22ae129cdbe9cbfed5. 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/FR9W12327205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ae2d1a1c9a7f825a37f71d6a42f591b8ad35ffdac25fa93b8e583fffdfe9d9. 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/FR9W12327206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb8e259edfb148dd23d056b1d03b9a12131a5a1c59a1f68b67338f34b3f5e5d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12327207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150148c61d861c0b40e4891663b6ab7923c541bbd5261461be9a5864d471567e. 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/FR9W12327208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4373c244aac6b5a6c3a79bdb1af75172a83b22a2184c19cb95f7231c87618e. 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/FR9W12327209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d1f9c9dc3bf2fc0b82d5e5fd3552005a4a5fd9845f9f4b827358ab3039e6f2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR9W12327210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea12c0d49f1c124dbbf149bebc3a89efd60bddbc0e1e22ba4cd92d648ac0239. 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/FR9W11920697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747341fd8192da2a157aa69fe0a0d82ea863963e1026a53b6783730c715d54c6. 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/FR9W11920698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7075ecf6da29db876fc49abb81afd766434c9662ccf03faa6700396e7f2c22b. 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/FR9W11920699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f1446babb1fb2e238b48d50c04f4bab8ec284a1f14e54651a3a9022471214c. 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/FR9W11920700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c034b41e9f60cb39776401c4dce263e4eaefb0d2e54683672542a2ba1e47fb1. 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/FR9W11920701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639d9f822d4da48aafbadb897496e7a74d5959797376f40a3d69060d1af8032e. 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/FR9W11920703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa559795a171ceee64cf49b4f9f77e584c7a03d6d453bddb43ee06e986c1c182c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR9W11920705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92de26df43b4d4c53132874f0e2c9c5a7b571ba4d60950d5ade04ac4830fa29. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FRDX62201210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1d2df1bc39c344763f82119a0f6856709a903455719a43f43eb45a5c4ad589. 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/FRDX62201220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419a6042af9ca4f6378395fca7d8e18368771ff2b5c2b9efc51b2d02490d66a3. 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/FRDX62201230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d08c8d642f1997daea1d00486425b1ea1fc7927ebada87ec26487ac5ae2a8a. 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/FRDX62201240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7070bf8030b0f823df8c375ef3770dc48fdec2e5601318de2c5884e15d5eed23. 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/FRDX62201250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d95b66ae1890d241f739959648fbbaaff64a287345cf42e8c74b99db950e0b5. 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/FRDX62201260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5643beb53a2dc65780e100cdd867e012990b695534fe49c23022d69f5fbe93b7. 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/FRDX62201270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53da8705965086a414752995602ede1aec51788fc52656a9790fb3aaf60b231e. 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/BE0491500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f7543a545e4ac9cd577c5eee06bd56e6510d7546961d22ae129cdbe9cbfed5. 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/FR9W12327205.
Il y a des choses qu'on oublie pas / Che voce misteriosa sembra venire dalle viscere