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 0x1dd70e51356e5e0a08e0fdc8525508d4c282a6d0d587b4e25f6d7311b72be965. 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/e6541f27-86d2-488f-aaca-5927e85f4884.json and https://artists.proofprofile.net/proofs/artist/e6541f27-86d2-488f-aaca-5927e85f4884.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 0x91e1f34639ae70a020c0a82ea68d76e4af45ed560338e5f70be185c8c758fe42. 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/TCAGT2389904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c63d6d90353839fa9250ef29d6eb67bf30ebb8d251e3e69abfe80d4460aace. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:41Z), 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/QZHN52308865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fda817b170b9705db69999a357d6ee7b5b56bd33bb2ed79f82bce2ef19aefa6. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZHN92335589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa056944d02639228083545797e72466bfa522ee75f66fd6c57e42294bd164c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:51Z), 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/QZMER2301820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c5fd9b079c230b55c3acabb158167afc76ed591ea41f06b53fcd9a65c8d97d. 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/QZTB92310177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bf8b81248988bf99792f50951222a3fe405f1d435c1e16e9998cbaf7a13c6a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ762447065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c5363cff5038bf6332b8799ab0fb7ddece5cce3104ec2b7c4aa6260a42b1dc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7V2423668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b587f4e646ddb20161319081d9ec28f5e33ad5e39e8d5bbb719989d70b0830. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:30:53Z), 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/QZFZ62571768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3d0bf1c40a4a75a13a5dd69d9997728106e6697dbe0907df0fd7f1accc3df9. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZHN82592993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb067550e34ee53b5002386fe05e5e67bd17add7acd4bf3a7d21ebc7b905b4fd9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN92528417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d57c47529441359a00e04251412cb19a8033b51b3269d4f932af3bf78a6430. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZMEP2527455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9aaa7122f3ed285e125db2846726a2430b8fadb7a9f6214fd27549d99531e8. 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/QZNWU2519127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69679dbd7aff6fe3b8b34fba1e4552dc28c95f9d25ce3b2edf1ae03ce64bc3b0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAZ2567801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ada091eff3abc12faeb6c059787e47a0488db6541225253c1433e2ba73ae8df. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:35:19Z), 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/QZTBA2567520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe9dbab70e9514610431adba3d7320434335699aee3e85f0cd734968da2d8a9. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZZ7Q2592574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb168351a612eaba20a317e7c949b5fff302e2f8e592493ef2bd67cdd0e7c5483. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT3F52545533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649acb69a1b879c55fe644e8cb415eb028ea4c16dc0558b1e44aed224685b42b. 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/QT3FC2568824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f6208b1ec24253a8f30b5a81bb7443ebfd321943f4eeabf12357eb4314feb1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT6EG2574526.