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 0xc5166b6cd070b6b7b8a1545f8dcedb471459161207481c7002158c6519ca213a. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3fc4830-00b3-470f-bc9d-a94be954499a.json and https://artists.proofprofile.net/proofs/artist/b3fc4830-00b3-470f-bc9d-a94be954499a.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 0x254227803d8ee3256b97e084ca9115eff7e1bb10736ad57e1a263a9b7bd732ce. 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/FR2X41457475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280c854aab2fd2f2d3574d3086c505ca8bf1ad2a8e735dcd5a226bd6a0f3a0a7. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TR2180602028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b58874100d7ec27e559d733478b89d28aa28e3a775576b41a43f3498599113. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TR2180601402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a1f1301c249c1d5702d98353fdf2c08c5dd47e01cb9991bb8070e0ff014f84. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:58:31Z), 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/TR2180601405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b8c911634c4ebd093eb9a5729cafae839718f94d19ff50507d76f452e093b4. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/TR7251200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b5630fa114d8834c61619c0a9601003c967c652c04302c6e6c70076709a58c. 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/TR7251600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a47dc44ca9892a99b9cb3ae923dc544d2fef8d40c36b5ef8ea92699cc7acba. 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/TR7251600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657604532f45ce4144beb261786a5b4af3241892c8ebc62d91541a747e977966. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:12:39Z), 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/TR7251600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95871e39617593e7974217494ce79e3fdf207e13caa661d73a99e8c9c6757a42. 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/TR7251600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf970317a84366654f790b0832fd9fc2564193d077422eeaf2c5171b04e2e188a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:22:54Z), 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/TR7251600020.