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 0xf99b6223d1c91ab79db60550bd833ca7b42ec4e9d8f1b59a25e442bd96ee18c0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fddebeb7-9bd6-41ac-b4bf-67fd33710bcc.json and https://artists.proofprofile.net/proofs/artist/fddebeb7-9bd6-41ac-b4bf-67fd33710bcc.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 0x3365ac862ad57cf0daca1a4fa70db5b3f24adc4d8476fb3ca8f1195fde504ba6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:07:38Z), 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/QZFZ32282255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e0299d68aa0ee0bb41197daae92bf813e37125ac485443059af9df97329ec2. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZFZ62259370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2ebe84ad8a5df88af754cedd77eeec85a75a11e9b4fc96ef2d6956bbaf5036. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:20Z), 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/QZFZ62259373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97890d84d93f8a50aa008951facf7b53490ee52d59ebcd16ac70d02c57c902df. 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/QZFZ62259374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f769b1704b7426d664017b3bdd7596273fbc1a39f7f45682229250863fe2ab. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFZ62259377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed866d5c011120239b07146715bb7386894b739899e589b38bffa37310a6810. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZFZ62259379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f46bfe77808c91341c1c8027e30daf3556fdf54bb44fd024631a45a6892776a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ62259380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03694e74c884caaf7b3841a96971fead8f83230065bb706caf19eb1a5ef912b3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA42235734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd651e657ec25423a55e67fc9a2161dc108539d05b64aa85c0f3ff5f3340a1a21. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZDA42235329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c62784363cc8016ebc74222c6e043eadefd5b3dbe7498573deb8e71c01622c9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA62293131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388f8cc889e8853d9b73e2b493522fa81602e88cee843797d5fe872c582ff5f3. 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/QZHNA2272668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c402cccde48418e7a14a03272715ee613c3b76e0f18d0408bc87139ea1e0c8e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZRP42250786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20c00d313c6b84f83543bd2a15dce8f294b4f4722898e590ac0cf5f06432062. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES62389563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f27663de50d99d8c70f35b6ba775f5db64f8d9895a26dffe1fe3d91c0f01fab. 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/QZK6M2392363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d366ffd8189deaeea1b36d45ecb3c18ba8073788fac00c89143d485aa7e86c9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWR2387304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea87f69c6aebb4b642f15cf6d319e443f6951e11fa0d856c944fd1c61f36463. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWR2387306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eebc53be515f09262c64dee880756af4d8bdd3b49b289193360f3ac037e268. 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/QZNWR2387308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5461b33a0f795c3a6d5cee4cc5d421dbbb917fde1829073ffd3b244922170151. 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/QZTB52370487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d59651744fab38e0ca690b394939e69e2c1c4dd270009ebeb912327bb5d3db. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:22:07Z), 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/QZZ7M2473966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981c4ede7e503b26d637544ccd18ea4c8d4aa4bfbc0866703ebce7dd922ebdd8. 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/QZZ7M2473970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883b54296c9fb199bf0ab3cc11ec437624739678746879b7b1f141434223ec12. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZMEM2507825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939a3f8961e659e2deebc3a8a1c66546278ce03d3720731fef9be1a25983236f. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/BC6M22511704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b7a03748fce0e92a377d4d5c7bd52412ce175ab40c82ff2e4a6962beebc806. 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/QZTB62532680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8b54c7a556cbba3f9a1659ac9f7e28a03ca4d2e0c90978db492a46b05bd28b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:24:42Z), 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/QZWFV2570623.