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 0x893a22afc2e5d7625d45d449685296424459710e88b586aa3f43456779336958. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf25a7ca-8fb3-4518-b94b-845cac723854.json and https://artists.proofprofile.net/proofs/artist/bf25a7ca-8fb3-4518-b94b-845cac723854.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 0x3146a1fc72c609fb3b96d0e7e4c122815c67339ec940ca1ef616b04610bc1736. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:28Z), 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/QZTAU2495154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0b2b91900de4f0a5a4214b0c0d646e2a32b59e5d30ca0ba739adb470f378cd. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:40:08Z), 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/QZTBE2493885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89db6f04ee6ef923a28e13e0d58af21fe260062e987119cc37e8ff0ae6e8ad75. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFQ2410540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9dd60772b9080deb51df776ae68e49ce51f96563ae6f1930a4efd5c8dc0110. 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/QZWFQ2410541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d0f1b4da19c279dae59e3092fb16b94688b82dec2804c517a803f9e5832dc8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:41Z), 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/QZNWS2562263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eda7cadc234df73441577a1df1811643fc991405a3a4d99e8f9807665c9ea4. 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/QZNWS2562264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37449c4b0aaad1a45365846c88ce552ad1d9e09954cbc34d902a385f32d06d5. 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/QZNWS2562265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be5f6876b00891a0c27f007acd904ba8b2e4e1c75ed09caeea98e917cf93cf0. 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/QZNWS2562267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2f5d664ff3a62a2deead9400041773435afe5c1d900b6c709324bb55adc7e0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNWS2562271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773430cecf599a76205d3ecef283b8920220b955119271955d2f30667866d217. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:40:44Z), 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/QZZ7P2489684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf204c0504f03865fd73ab8b07f6aa5eb2ed08c2aca58626ce0aaad4383b6fc35. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QT3F42404880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031f5ec5ecfbc24b6781a218114b3c8ea44c7e6c3a0df0291c3717daad16427f. 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/QZDA72593947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3aebd0c1def7197c1363d54f844e982b3b48fd956ffda561e0616731a49f57. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES82512800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a310baef24858bbfeb543af7c393ab759481d7a7d435080f877afa0a8f22bb. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWW2539685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415b3aae23b96f23268835b4ed93d09794138d13a648dafe42922c6b7efbbeea. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:21:28Z), 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/QZTB22567208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c504c2ea0d393261395ef2115088f34a06e3e9a43d0c2330c77a747e524dc50. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFT2599632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5c58d4bcfde572a25f3978906348ce819cd5c6471d925822aeb6a480201868. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:31:33Z), 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/QZZ762520150.