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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466a27c6057e64cdcfc885ac406847845df4304627284867f5a4aa598dc6b62f. 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/cac89265-c0bc-4606-a79d-595958ffc90f.json and https://artists.proofprofile.net/proofs/artist/cac89265-c0bc-4606-a79d-595958ffc90f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tous Carbo (Extrait du projet Carbozo Vol. 1)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ea4b4497b97feac40fde487840c2f30402db70b79a5474349981495fea5b44. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR10S2159546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33df6cc4c896e91d99679f8fad1e1f15db84a9ed13983c6619eea0d18b0907d. 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/TCAHM2375589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e6c2f4f9fa2165519bfe6d724dc0d0376c5773e0b6befcdce4804d2560d651. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAHQ2312552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac670f168581a17ad26d6f6372cf0ab074ebabf0efa398827872478d706301e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAIN2408669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26a760bfe8ee5a92fc83a152d8123900c1e462e4bbd32380e8b732795c48852. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJH2568276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe129e193bc0f2a98f98cb55c3f795fc4610d870a3cde97018c1419b14b481f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJS2525032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343a988eb080ce7f1dbee60ec90abb460fa25ee5527ab3b50c5a60ee74681dcb. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/FR8Y72100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0a50b1713d0af6242dfe340b241671e450c95e34459bd1da6026ecddb9fb47. 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/FRX282197074.
Les Prédateurs (feat. Naps, Hollis L’Infâme & Solda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa48d430c97697e40b0b4c74bdeb1a6c022b3c94952887289451eb53f8d0337. 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/FR8Y72300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb52fd05d174ecc7f1e1a6a8fc3a6ecb0077937e5c10883cba05217d65195b3c. 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/DGA072469540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62de2fdb0bd5d305ef6e3c59e6d7676f14b83c6a2efe0add9658356d8e04184. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR9W12428326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd053730497dbe97546fb25b92fcc02ac365a54c2fb0f50ff70a02b4a26c32200. 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/FRX762125237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2195bc267eeb54ebc508194bfa0b3b52874fcf68f4d5ecdd5f4318d8a7e5351. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX762125248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86244c805ab6359cd03f7084e286a4530f732af97fa111ca4aecc28997863444. 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/FRX762125252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e784889df5fc1f5212a3fcf0a47fe490398155c0b8ea81153b4ee3d07dc542. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX762125261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c157e8504304a0d9485caba4340d05ebd03f90167a940e34ba8f17bb54e1a4. 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/FR8Y72100453.
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