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 0x38e5d864b981b97f04f8a60e6f3c6d5627b2150f323b8925ea385b4ff012ba60. 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/b7314e7e-5c1a-49f5-938f-a559263cf8fe.json and https://artists.proofprofile.net/proofs/artist/b7314e7e-5c1a-49f5-938f-a559263cf8fe.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 0x14be06c9b6d7ed5190cf186a30ee57801e487c4fb9878ad83d12d453e37f0d34. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWDD2448168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782c0e02fa5272cc142d5653b212e66c9ab6775932e95bdad711a9838b3946f9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:42Z), 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/QZWDD2448171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c5f7b457e482c41e8fcb6b4c00fd8bcb5d975a8fb8e5b057cb377ab9da544f. 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/AUBEC2463056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd331d3b91dd1b830c2c66b7a0307a8a5cb6f4da27db9514db2aad0a570dd312. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:02:41Z), 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/DGA0H2402238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787329f73aa441c0b71428292704c258dbec53bfa9645bec921ef98f7052118b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0P2442048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c0a09d6ea80e7cd86844aa920b247c07a1c1214415dbc33b126f03c4c8d47e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:48:59Z), 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/DGA0S2499510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bf8b12f2a4a43b34e38a6ad11dea6c5946f81bd728d76bc3fc12c393f7e405. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR2X42516346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab91adf41ddcec8b7595abb4eb7c71fdeae008f5cdb1edbc6d189f3b03fd7870. 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/FR2X42569316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1217f0c3dd9a82682f3344226f2a9ce57607e31b0437f2cb0c214a1edad4c239. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/FR59R2516331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135b9ce0d64a6a5e4acf4b5c2ec9f6b6a34440c54b83a85fe9fbbd85a5a11aea. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/FR59R2577231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c92ecb10d045717ae3d839c7cab7a906db8f2e2f8ed37f1431b8484069e657. 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/FR96X2549322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd952e105d9ee6f4150840dfe3eb453a0dda0a3d51ee2bfa292b20593e2856d. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:39:58Z), 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/FR96X2599841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff9f16b3ae3624512df3f5be1de14bf789b333f37c99a46dd11b3119616a234. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:50:17Z), 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/FR96X2599842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9bccad5b868a4316ee009d69ff056ac28bbc9c8ae651c9572e0c12190662df. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:05:24Z), 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/FRX762533262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe02c4b2223b9a81f91b83e291f3db4e3d9bb206ab47366fd90e8bc1e82b5ac1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ8A2530112.