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 0x11f96dcea07acd7b3d3863e0fb773e153fb05602dfc5d0e5d5cdba2327afc9b5. 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/e8ba2108-63b8-4ab2-872a-61c6385450dc.json and https://artists.proofprofile.net/proofs/artist/e8ba2108-63b8-4ab2-872a-61c6385450dc.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 0xc0f9158edcae141bdbff3858cc4bc9d31d461af58646d1c0d91f9868ba7234aa. 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/USLS52107001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70aac1dea7dc0a471b262b654c4bc8949d3858b7d5d3a59cd83320e9173e8776. 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/USLS52107002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f16225353d77c1663b2dd876bd69032c62b8013226962c223a19b58736cb31b. 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/USLS52107003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4505c85ccf308bad1b19f19a305efaf8bb61221d24ad209d64580565a2ce8fd9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USLS52107004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d35bbb2b3358fd13f6118d688b7f38367db6196249ac25a16e761f5ff0c67d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USLS52107005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf1f571202e8015038a21c434525785f290e3d85775bedd5e54122651536ec7. 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/USLS52107006.
When does a country stop being a country?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814c86dd63d575119f705928f6058a0712ee83ae185ecf6fc065474e63bab7d5. 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/USLS52107007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c163592c6b7c47f10c194aee5f896a7b1a0bdd634462ea3ebf93eeba2d3789f. 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/USLS52107008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847408c3733144451ece06a12da586ebcd8dddefab3ca51c01f30ac65e434012. 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/USLS52107009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18484944a07317a8f24279f87ed308d610b37812c4da561a987100a6a5c50b25. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/USLS52107010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435473b070702087ed444b0f0dc82291eda11aeea570d7f9bfc4b64e84220716. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USLS52107011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e2b7919d8e37fd39f72ba399f60b0c715891a34c1ccb1c21bb32ef8fd79fe6. 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/USLS52107012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe115593ccee769e274f41534147d9478c58b9022b389ce439f170987f0b7b8. 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/USLS52107013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe633fa84a961ecdd2dd0eb3e25ceee7f6faec11e725fd8d2154ff7b15a386599. 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/USLS52107014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e4706fc10b6549e90e4f51b9233884bbe4e618cf4b131813d47db449c69b6c. 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/DEN961803530.
I filled my Lungs with the Necessary Air, and yelled! - Ben Lukas Boysen Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a616916bbffe09c90cb6745ed5f5e269e6a29f414be842374065f420cc22c1. 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/DEG932104609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf408277d18eb0e26c06c4704e50814891f786e758821c87852b3bea4a49cded1. 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/DEG932104034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5402dbb353a0b680bf36bfd16c38cb3e53fe92f597c46dea89781ed1f95df823. 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/DEG932104497.