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 0x5b979456a7ca49ecbd8c591dfb424038a39d6491fcd432fbe43a156fb2b5a86c. 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/e3399932-11f4-448a-b549-7452918d7b61.json and https://artists.proofprofile.net/proofs/artist/e3399932-11f4-448a-b549-7452918d7b61.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 0x91762f93f05346497e96fe7a18c8a88be446fe15092964a1ef108c8a34c81bef. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR0U91000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0588a3591183a75bd803a60bc211d7e193a4eda6a9545fabcf3588ea11ad5c9e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FR0U91000284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8c3f7705a59dad10e269980467f2dadd177217aba3fa2c69b6672e435b84fa. 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/FR0U91000287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d699b5d5db6ab6065cf8893e6ff96fd0409bcffe0e7350ded7b81e69a5b9f9. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FR0U91000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2142d04a7b812d32e9f3b618930b389cd32fc1cc3236074c6359f34d6b7e0380. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR0U91000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c6a13a2ccaf48d29b281d6a26d90d632f7f30148afaca4ef62783d18a7ee8e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR0U91100449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bffc7e3d9a7dc2dce506bf88ddd1903e5a9ecf8a6a2f2f7fcc12ee28d81791. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/FR0U91100452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b192d5b3b00a9aec3640e8fad81cac1805a7e76f54d75566c9ecf4f12e34cb. 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/FR0U91100453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff0967d9ec7bd87b0069d992fbdbf25f7c17257a91810dd0bff6e8e9f1d9686. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR0U91100456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce0eb5e2c1a6ebc4ff8dd47f5f53e88812ed292fffa79c5663f7b93cdbb4b85. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/FR0U91500888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aaa969db1c3fbd8dc8f1e40664d5f21485f6707bd7d9a1c87988cda5ebad42. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR0U91500889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64073d3d861e74e9b0a186f1e9bc2c8088a34ff896e783b9e15e38adf46f3dc. 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/FR0U91500890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221de4179ad893ffbcf4cfba4795a9a3a6afe385be602326807cf7d1003b9a53. 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/FR0U91500891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9ab83de868fa9d0a703e31211a48cdd59e5138583ddec97e405c9882854599. 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/FR0U91500892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422ddf7c0c42cd772e9b4edf858b059910c4ae7ebd832829f4c8aa681171c1ef. 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/FR0U91500893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e31e1604613526ea00cd9253a72d091153ccd0e9f087d01411f33353cae3fa. 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/FR0U91500894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7519c2a68fcda9e494e6e0fa1f6254eb632d84a70e9fa7b2e996100fb0eaadbf. 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/FR0U91500895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b1d9dbe9045858f96d59d2832d25ecdceded487118b9c521ad4a033272429e. 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/FR0U91500896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea27d5ac062716b37443ad20dd891d5cf48590cb9bcf7ac1dd77b96e7069bea. 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/FR0U91500897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85423fdffecb3f6823f5635a257ca439d33e26ba8ddc7c302c2e8b6742a1bd4. 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/FR0U91500898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01af3dab002cd546210802ae2e3e997fa08ab6a9cb8887792c9c7ef1235e5873. 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/FR0U91500899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb000349cc01e439599ea0ffc3184ff3534de9595e262a992262ea48c5b4ceb3. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/FR0U91500900.
Que reste-t-il de nos amours (Bonus Track)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9f5f4a94689a506dbeeb00f6f1e2eb817e117c9c5df77b6a4043ea9c1c5cbc. 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/FR0U91500901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385b5b1d06c8f873050a78bdf5c1053df441afb687d5bb9cbb3c5d87a2ff2cdd. 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/FR0U91500902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edb21561aac8b19f154494d9dad20ccfa9f74bd606a36398a924bd2f1290420. 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/FR0U91500903.