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 0xad905e941550edcaeb13d881ae5b1f07f88f8365a783aa529cc3c1ec6c33e361. 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/8af0aaed-d503-4389-bdd1-9cc05c59e0ec.json and https://artists.proofprofile.net/proofs/artist/8af0aaed-d503-4389-bdd1-9cc05c59e0ec.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 0x9e82ce73d33fc3bdb28ab62a979993807350ae15ebb81e4198ab04906144c66b. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/DGA0S2426150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36396ff5b7070255b43423a2923d2b8453c967cc612c9113315253d6398704e7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:37:16Z), 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/DGA0S2426152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f4c9c5c11bc9e968a355b5963cd04b47e7f14b591586afc4a96aeae8a7df00. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DGA0S2426153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9419947b41481adb769b287f9d36f50884d9eb32482b76d3ff287c03ad05c4b3. 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/DGA0S2426154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e57456bdbd6a63e371c96476d3d8caea0c97a633bb8b0e08bf9c3d39f1a773. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DGA0S2426155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6091d3173045f730f489acff5bae72e09020b32c047a38e4b6ca1f841cf7636b. 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/DGA0S2426156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a69bd5f33be0470fa218e15a2b27ab3e19c6ec246519e3730b13ea6991ff7b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DGA0S2426160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edf0269760dc67fee92aace771cad59f4cd225faabc4c1dcba8903c832d3e07. 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/DGA0R2462943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceacb087098e41ded433604c4ce44514d5ba52e17c3cae04a6961bdf4535f0d6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DGA0S2426162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f7164dbedde5804df3be621326a356bfc2841afb46a2e63e1c5c97be3bd1ff. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR2X42577398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc646c7450b549aeee064087fbcb54d3a15f56c02f34c6f6a96a6cfb23669412a. 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/FRX762563018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63454a60613ca0a7e3c1420f918a3719bc4a7a1be0f46b1f77fb4ee52617902e. 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/FRX762563021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376c574a428418bdd613ed17b3b04690fa95c5446c7cafbce115301640bd81ba. 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/FRX762540216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5769effe86d4198c34edd648415be6943047811b020b6aa608422e3b9a5cad00. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:29:04Z), 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/FRX762563023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b2b7002c9d2af1926aec9c269022e02dd096fbe0339693981b070a81f1d7cb. 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/RUAGT2572380.