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 0x7f0a63ead6c9a0abc0b1e0fd1ac5c3a71b0de9cd2ee2d066810e3ef66618b6ab. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a836e1f-292d-467c-a387-e6fd7e8ac977.json and https://artists.proofprofile.net/proofs/artist/8a836e1f-292d-467c-a387-e6fd7e8ac977.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 0x0c143bf36c91f8cc19ff5d892f87eceef1928098012a2da7c0fbd3ad5203b015. 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/QZWFK2563620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff53a59f7aa05a87e01e8a00f5eece8c3dc0002817fcc54ada9dcaa31c1608d. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:51:56Z), 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/QZWFK2563621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50457904efc1532613f661e75f00961b9655ca9f2276d6bbd39278f3bd293f20. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFK2563622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dc3c1f130ec83fb4e91c26a82c6e6bf66b93d107b0fbb661152d7784bef93b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ762537523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd119750482b8a8f7f05623eb5e898fbf18144b9f21ca7e27d7ce210880fecc38. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ762537524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edf421b43fc356a01f61a3d1a17fd929aa4f432d01922bd6ca5f0ef73c547bb. 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/QZZ762537525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172d49054b2e63acbc36ebbfdd1fc32be7529deaef6e80cf594d8af753396aa0. 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/QZZ762537526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb797ca7d7ca18d6e4ea2ab88535ee080ad17be5847339c53d70baca08b2452. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ762537527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81628ee59cf3d3cf4831d17c423826c8e883ba95efa0dc04e1e9a470dce7ba5. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZZ762537528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eff4a27db870f589e1f8d2fc1166c5d8543a3c0d09c1bb7596881de6f07dc22. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ762537529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc412d81a0fe767939130513008519ba5427e069553c8cceb1cde44fa62f23525. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:03Z), 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/QT3FH2596612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeccfc7ae675d189b6b032b70ed8d9c26caf5dd808770960e8db9491093cc87. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:32Z), 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/QT3FH2596613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff01964e5344b307d4d5a26a77382e5a273b47e2233675bae963aaa96a3df4e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:52:03Z), 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/QT3FH2596614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e58c87198c401647661e3f9f9b1ed7866dc0c6e33e808440e71ba6bac18165a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QT3FH2596615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad3a0886517dfa11f789b43f468c08502d1c2fbec692a0467f36a09a63295a2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QT3FH2596616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098eb9f6b2f12712b47ae76581d92c1360442c45de5bb9cc6b05e870ba0d2906. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:07:39Z), 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/QT3FH2596617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8312c18dd0616046c81cb48d8a14151af8e0bab5cfd0725f09b999ef00394efc. 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/QT3FH2596618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a8a4419cc9be07dcccdca287da2cd86fe43cca6c1f90487d4afa9e2f96f87e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:36:59Z), 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/QT3FH2596619.