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 0x954f26f2cf1069837188840a2ced22b3eaea79c182f432d7ed8c136cc133c253. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5043754-a7e0-4a05-923b-890104378eae.json and https://artists.proofprofile.net/proofs/artist/d5043754-a7e0-4a05-923b-890104378eae.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 0x52590c2b5be46c4b2d27c2679cab6088b192c8f88025b13ff0a1df54e26b08cd. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:41Z), 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/USHM91208888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f82175cfa343c98a365bb4cf22b46c3170612a888caefa8f6e8303ce4eff0f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM91208889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09efabae020b216c849fe1a064a9228c29e61bdb16c41d3b3800030885316de9. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USHM91208890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfa0ad83881f1afd0ae21e730ce518fc9f4b784300c8205c978dcae2572c9a2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM91208891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022eb12d682311c17578f0e6ac378a71742739424926bca0031d23ef6c2f633c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM91208892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a25308ca8abc48d0a3930625726a0547dacbb908db4d332602c993b42e8bab. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USHM91208893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3f5afc6e020958b6a1f668087825f6b6f6a0f68f62c0ee583e869b351625dd. 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/USHM91208894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff4c90f97e46b72093bb61e5dca46196d0ca714e841b21ddc98dd300a939ae8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM91208895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0694074aea44cbb3e58d2af03816d8571e5f091b77a10379c075b211d42d154c. 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/USHM91208896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e65d9ea3fe8413a208cd6c2e27c7015a122eebbbc488c5a2e9de9e777ebc29. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM91208897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60ff7c16adb4d1ae52403e546d1849e2aa9d858790340f057d917ba0feda3c4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:46Z), 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/USHM91208898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cb03ef413e8e9b0297021b8a8e6efc6e9672ff9874841d39b722bfb5e43ec2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM91208899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495093a1fa908d7054eed93eb5117cf34e99fa86f885e690269dd740ce0e2abe. 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/USHM91208900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1564cc0119731fb36bf91a2a5c10bd87a384d695d5ec52e9769e314ea32217c. 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/USHM91208901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b5069e28a90fa587517fb969d798dda593f7a8ee5fe31b6a3dafcc0e9d90a3. 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/USHM91208902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e9d950ce35ec15a0cb91681737938872424d9cc7e025ab19ebef3a02158fd9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM91208903.