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 0x5e8e248b7adb81d8a79d47574eae6b6261b40cc7356325ebb260688af7febc79. 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/6095d318-7994-43be-a8d8-167c0a66bd49.json and https://artists.proofprofile.net/proofs/artist/6095d318-7994-43be-a8d8-167c0a66bd49.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42985c53a91aa5713be65d83a55ee7e7687cf73dbc7bcc13ac4f0222d42b35ab. 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/CA9L62200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d2e00b2f02a4aacfbf55e4e29e9770b9fa001db4b8b0f2b46508fa6b8cef41. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA9L62200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdf8d05bbef9b72e20cd5856eee22b35b3b0818a5b90b61ea74adddaeb69448. 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/CA9L62200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc93d9f8b13a596457fb896e22b585599a6009687e6f7c601c360ead9fd2c0a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA9L62200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48caf636aef809bdbad0efaec4d6f99140130f35677f0b9e6839682ffd1435d5. 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/CA9L62200305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2c4b45c842bc47ccaf8eda00b94055c106f06635838e6263cea858b7fdc90e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA9L62200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0053b6d1cb1a935a3c98ac83e7e17bac176ed89c17ba343295a2ac1d69f3f2. 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/CA9L62200309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4676091d7986239c1aa64e81c4b4d1ae0d56fd6c23ceb74d9a6efb0b8ef895da. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA9L62200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ae95c1026ca57871901bcba2da60c68aab898525789d2be8de7523046c6826. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA9L62200311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d79f6d6ee8d72644482abe3d1697800454de91238910b1224fa6758f83acd8. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:31:56Z), 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/CA9L62200306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2954f52c10fe6616eecb7d4aa30b74ab896c7554dd035291bf37ac2808430fd4. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/CA9L62200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42985c53a91aa5713be65d83a55ee7e7687cf73dbc7bcc13ac4f0222d42b35ab. 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/CA9L62200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a4910fffb0278e77245e1da18cf10563ab9ffcbbb84d78c86814b001d4e01b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CAD980831402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9213b59f306bacd27d2f13cddd5a9e1f33cb5ef91b86d762fdced45d2ea09423. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CAD980831403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f83cc13aece6dff66eb98b1ad7e65032dc4744ce3012eb9ad6f11a6bad09f6a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAD980831401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f5ab7092ff71f5f3aca88f5ccdea69929cfa5b5277c4a6324f52f45abdc5ed. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CAD980831404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d2b7f00796e2f44888f66b4ca83e22b83d6f4f203d55d2af9c1ca9e81d48d0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA9L61600202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d56bd58afb3be3a40ee9d241f8eda08ee82c2dce70e6cef2745237fabb5470. 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/CA9L61600204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5089f50996de8b73e10baa610b2b633a43f849dea9984bd6bdb5ac66c6ba794. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA9L61600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544304d848435e0426312ccc13ebbffc764f84ebf2ce7067f61634403f687fd8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA9L61600209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862c43718314856974907d39f18d6d657aa20ba8a7f6f8070a10914d0e657ef9. 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/CA9L61600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99bc4bb70ff82e197f32e09bd1ad89cebcb41ba6205422e497ca1afde6702ac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA9L61600211.
Six perroquets séchés dans un tiroir en bois
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30dea750dd6d859b8ec888d99a29125af6be464ad72390c7df1f41acbd48a52. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CA9L61600212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8261ffe56211bd52f4502a59f23ef5272c4c46b5e911e308696d9156da3454. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:49:55Z), 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/CA9L61600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1be8572ce765a8c2b63531b44c1d51263b65630384fba7ccac9210d1c422a58. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA9L61200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63cf6cc31e830f8a5f8d90ccc047db425db25e96bd780bf9b3c108735fcbded. 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/CA9L61200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8c3a8d9e0b2f6b2c43961c047fc69f58ea0f41737c0e3ddd8214c42fc2f801. 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/CA9L61200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000fe5740a4002392b5d42b97436c67ac7adac49365aca6016eb56cad0d52313. 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/CA9L61200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d19f2a7002781953240848e41c8f455f18bc80adc94e41cb5e8861910b3f42f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA9L61200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81be45b1409e7669a274bb56461bb0b4d4e40a6e4dcdba9e4a3f0ffc91ef272. 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/CA9L61200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758f8b9b468dfd53e4d400a81a734a7f336909da93adb2215692af1831d855c4. 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/CA9L61200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8c9d745ce604fd2304811b9843ec43596e133c6b900bf11939130f5fbf64c9. 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/CA9L61200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7152fc7aadfc48c819b521c60de1059db7c5c6f31c87168155d9171b108419e7. 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/CA9L61200112.
Jeffrey Dahmer au musée d'art contemporain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fab782319bed999bf15a3858ce4b4cede76c23fed688c64f34a81761fdf1968. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:59:10Z), 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/CA9L61200103.