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 0x5a580b97756a3528c76e68c5ad805a1b4a80de1298291a788b0138ad5ea8339b. 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/df543b2c-ccb3-4907-ac5f-e2a65fc747e8.json and https://artists.proofprofile.net/proofs/artist/df543b2c-ccb3-4907-ac5f-e2a65fc747e8.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 0xe6de9dcbc8d4f72600a4b313b511e3ed8ec6e15dbd2dcaef1516d6cfa79104c2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PYC842502311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0e8581ce327b3e0ca1a4173c51b02ba815fa6ab2cc0c7fe612d987c916b0d1. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/PYC842502312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59df4274d6cd2d20b0576a03afc3b0b53f69c93f0db8d88a55526c87d09854c6. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/PYC842502313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c3306c86328d700aa11ded917c91f791716d8636aaf30852ed459bbf04f1bb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PYC842502315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bb0c3be7fa84153990da64ec8ccc93213cdb17cc67b3bbd209763dde80449f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:25:39Z), 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/PYC842502316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc569377dd747adcf0a043ff86237b632620445ec11842b3fdcafff087220475. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:06:02Z), 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/PYC842502319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60b53d61f025bc9a56ec6c68bf1c473aedfdf398bf0e62b7ae8190ff5dd6ef9. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:57:49Z), 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/ES18B1600707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d3666aedee26d582304af1af24a7ded880e7c1378541bf285adcc7f52d0b5c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:35:09Z), 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/ES18B1600708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3542dc63ed3de19e3ac18bb044e4e8f9d6f1419c3259da0d93719efe6a11fbc2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES18B1600709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9502ee746a49d6c923b155436cc46952dd130a0eb6c7259c8a048b3983f04ab0. 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/ES18B1600714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6717b8bfcd03b31d60264ce71944c4075fa7880564e2a1f9dfbe1ed7bb159a. 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/ES18B1600715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a1f136806e007bbbda8001cdcee69a4cd604abf03acc350c4d98aa1ebaab30. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES18B1600716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c1314094c2fb5c1ebd6e9a736323e332887b44f00fbe069dae640882176783. 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/ES18B1702951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f30e55c44313a248217bab20cb72d7c4b1560732082b076fdc0ecb1a6eb0a4d. 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/ES18B1600680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938541d8626fd0345c5a354f8a45ce604c1b1ea6dd0c8863df4c39e76bb5bdb9. 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/ES18B1600681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a83b68a856ae0f31f7c826422406bcdb9e9d6c12d1d78ae0c30939f53d1ed7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES18B1600683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09f60cb025b62e591fa9ea880c7442f14dd7b9ce556da74c96c03a74c580976. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES18B1600682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fbd1987fb1a598b16088fd59631f455dd9ab0d68f8d2fe5d966677cd9df287. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCADR1851736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5d6d822cf3b0ee039374926200c8a6e2d81ae4b9159873f85445307652b896. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES18B2301375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ea3edbf6f3e836302cead2e3c22bf7e11e7ffbfd5bcda027e6930344879609. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PYC842406041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2b80820ffd5051077faa95f7a7247d19d905c65be313ec363f930a2b36d3da. 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/QZGLS2542761.