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 0x6d1bea7ac1c79c76f23dd481253a5a1f08bd7782a994427e2a05f675a6998370. 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/ba2e8e14-0634-464b-8e95-18070d35a0aa.json and https://artists.proofprofile.net/proofs/artist/ba2e8e14-0634-464b-8e95-18070d35a0aa.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 0x39491759adf7da9ffeaa8cdc6dfec1b6d0ac8fc804614a71f47c1de4b16acd79. 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/QZHN92215377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b2d25ced8b64e3f264fdb80fb394e9c406af2ac65fbe0059012921d2948a5b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHN92215379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e48f5a9874501cd66c4703118b499b77065d8ebf6b02ac269af41870e96bcc7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN92215381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e3b6a7d471db4e0609e211f8d95bad9d60826667abd885d8ba99a5d09526b1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPLS2394965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2b9c022591a9276c37c4365f85a08aee23d1fcf6a6d5964b5784f64e8ea960. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFF2327281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf173e20f2a2fa7a19f605ff86cc04a4df39471d47d012408ad062e88358b861f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFF2327282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbd45c8a3ea300fa46121ca5941e4fbd3212df32cc9981c0149d8a99ef327d3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFF2327283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14a6914fbdb617063e2c7810dcadf600c44f83ae368a4eed22a0c8f6daef2c9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFF2327285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b0c435b79601e40acc221fe6922dedfc13564cddb60000b4ec5608dec3510c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFF2327286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1611150646e587455542f016aeb2ad8164d401cdfc0f53cca8edba576c846a. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:01:35Z), 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/QZWFF2327289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfefa0878d768b3bb54ee4ee77e15f0cb9a875e36dce04cd2e56f9e23d78fa9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFF2327291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1047f312e1a1c42775690fe36c36ae6266ecf84d4b7ef72e7dbe2593e212359. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:11:48Z), 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/QZWFF2327292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67993835dd18f29284d1f661ecf20be651b7595742b6fa66fff75a719ec3a401. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZTB42459580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b0a52f5f42693e86bd82fde09835ea61edbc04b0f3e8cc19eb28ed411e09a5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN72572372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720f9adac5cd5fd07da4768f0807966a57d4f86427a024670a95912da08e3146. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN72572374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13763e3d5b772465cfae00fae568f813c4a09962e013fbb4cead4bf7d8cd7b11. 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/QZTB62356382.