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 0xb77755c705feae08423ca2311f3c627e2f1f036027d6dc1b67aee97c7395c7ee. 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/f261c2a9-f067-46f6-9959-66998522f3a8.json and https://artists.proofprofile.net/proofs/artist/f261c2a9-f067-46f6-9959-66998522f3a8.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 0x1bf6b1462d77ff7db9936d7579db7bc2a292317fd93985ab73ac845f8d13875b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:46:14Z), 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/QZFZ52038135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdd0c81982af60495050de851ca96095e3cc2ce1832c0e0a4826c2792997599. 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/QZDA52071603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47bd0b7113fd0cf1f1590f560d5cd23dfc2edbb011cb7f91322233122132f53. 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/QZDA52071027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef282ffe4ee0635aaabf428a48a1e0f8e5e5e2a1ad0248fb809a00d08306899. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZES52078196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460c418ea3cda5420323bc4d2bec6521b1da6c408f2a2df935a151758d77f93e. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZHN92012784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10b1e48ce747403773e74629fcca8da1f75107043ae4d8d15366679992bb913. 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/QZNWW2085995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cae9b344950b6435b43da65c35d53e91963dc8419a3db2228453ef2a4688702. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZDA82197019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5311843e9e751b12bb98a74cb652a2c7ff3cad48b63120eb6010c4781aa7a051. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZNWW2385793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6446c3ab13f374f9a2ce3cf0e0c72d10284b44eced54cb452f012abd8229bb. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZTAY2330740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5df251d89962792453932775e5dadf686869c94a60d9cf4bedf7e6d698a667a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZFYX2486732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1971abc2e045c64c9f3a20485a8c2c463f52946cfffedd6ba3a00f4403cd0849. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZFYX2486736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d97191f8e214e896d318111f5c7a9465c6d80d67f39c3401d701f8762c5387. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFYX2486737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7641abefd1fc05f0a9e6247641fa327b9225ca349c1da5e12caddb4c8ea83ef6. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZK6N2418579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eac642a858e9b032b8e644da561bee04377e34ef813fde669e7cd884e71bfe6. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:22Z), 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/QZMEN2458887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9779ce763606f474c4b81478d0a55f73e68ca0fd7426d4615c89fb70aed201d. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:18:58Z), 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/QZTB72464832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176ecc2ce7fca4bcf0ea9d5d126357b93725a831072451295c28503f0bd99e7f. 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/QZTBA2478662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72130d654d15ace260b30e47ac30279833b846fa47ed39630935a4b30ba24df8. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZZ7X2416194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0795561ffb84a4cb23a931c1367e89a636e383faa4fa466012c4cf212e3cae20. 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/QZMER2543612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2bccdd2bd8d53f38bc90081ac5ecc1f268c91f8a240539c3459f7d1cc25fa3. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FG2598946.