thumb|King Edgar seated between St. Æthelwold, Bishop of Winchester, and St. Dunstan, Archbishop of Canterbury. From an eleventh-century manuscript of the Regularis Concordia. British Library MS Cotto
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 0x708097040f1086896b7c984e5050967ff8bcfdb12db52fb845908c7b9eec268a. 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/a011b82c-d019-4681-96ca-a41c463a8c84.json and https://artists.proofprofile.net/proofs/artist/a011b82c-d019-4681-96ca-a41c463a8c84.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 0x2b91ce3fa086644bfebe9f20138936204432e86baff4ba940fe2c801738104c3. 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/BRDEP2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a90aab7af6119f7b9867b66283a4f325e40c615a08b66f028953b5397c27168. 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/BRDEP2400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8058df51ee17de934b20f9f581eb73317b13e961431ab103547a1ce9c43b05f. 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/BRDEP2400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3919e628bd606483af32527b40655336cd557a7b9a736939854f30762f3654. 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/BRDEP2400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1ded9bc1b04c42f3acefa7479af2dcfd8b1da7ad6bf2e57cdc18a07711b88e. 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/BRDEP2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fdac351f64dc84d103beb11c6764a29801af7973d1fc60ea6d6a5e2c3c2bc2. 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/BRDEP2400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd415d08082c339f3f1c769fbaba961f1e16f45c5e93e01de62205f06a40fb32. 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/BRDEP2400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee71a0447f423545cd2508569f9070f1e5de9f261d504f85dc54a4c8443fff21. 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/BRDEP2400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a29a4973c078ccd02c00d98c73f1eb7adadbcd11e17f4b2f9ee8fbd46f2333f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/BRDEP2400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44944445a02394c66faa822077cabebf1c5281439e9fb18d5d9e77529813b30. 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/BRDEP2400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793145250989e5d5c6a663020fa2bac2418d7c2ed469d446cd00a1865ce11df9. 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/BRDEP2000313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96af0805f974a85c57e2602e1d21dc3aaece9952171755cf9de255379740be7. 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/BRDEP2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40fae000f008c9dc76ee42f0a655574067d45361c3362b8f265ca182aa303dc. 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/BRDEP2000318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2ee4547c23ab9ebf4292ff259e809fe68f000b8ae6097e8550830a00f6d9eb. 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/BRDEP2000319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b62cd9462f40d31bd8b46bf66163373d014f0e6b97106786dbe03cae1b63231. 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/BRDEP1800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3887f160923568f388c541bf09c346db2234ea871ab719fd46dec812176b73fe. 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/BRDEP1800139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d853f7fe6b4609688a4e58658bac86e7d3337c033088c9b7d87335598f34597. 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/BRDEP1800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa581a7522980b02bf2582e22885c5d0d6323431cab303dc59cdd73b855d65a. 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/BRDEP1800141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2c0642304fb14a8f487007cfda0ebe248536b8c91c9ff875cc0fda4d107139. 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/BRDEP1800142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e71907c2da29cc68ae72e4427699c2f871a5c274a0467b2292976a8bedd65d. 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/BRDEP1800108.
Antes Que As Libélulas Entrem Em Extinção
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ba10b4fb5a6dcb74f79dc40b241e1753adbdc2f68405e8a55b66f8ae9a44a9. 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/BRDEP1800146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3fef51a2b50355d8306a793d36c04a76f347344b3ea6322cb2fb572404c5d1. 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/BRVK92200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf095a58db6b8a0fedfca0a59d40a36e4389ab9c7a135f79c12cf2234f0f633c. 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/BXH1W2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a07d744fdab07fc7890494b246026bea021f6e0a969e58b4ec37edeb8e79384. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRDEP2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cb1c231a28f90d28207cc183c7a6c590730c2d6cc4ef25cae210dba183e5e5. 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/BRVK92000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f655d225efcc535d17b5ca573bcd03f710a35c9b8789021ca3bd1f291876c3. 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/BXQQ32000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac1ceb57c6ab037cc569f7f5de97cf6df75dd4292ebee72d1efae2ad7709f45. 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/BXBIY1900005.