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 0x36509b56d7da72c0a399056b9866456335a07cbd20ced282b075f2625cbcf7fd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/437e3c31-357f-4ca7-b1ef-6ad6fb7babdb.json and https://artists.proofprofile.net/proofs/artist/437e3c31-357f-4ca7-b1ef-6ad6fb7babdb.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 0x02bd3823e0b439adf23c2a6dfe64b98126b294a4edf488147de296746cf57e1d. 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/ESA011509664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48220f1e0d64c9e365fa96f13fba918b683592ce31131c6404f205b6222fa3e. 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/ESA011509665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd4ee22314d0e4466b99c2bdf50b6af9fa9c0fed1094c64988a950341c83eaa. 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/ESA011509668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045493be0dc4c4bd58e560318a133e57216a5c9b1d618d8de93e60324c235a73. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:44Z), 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/QM7281761066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e4973ff934a8827ea85b96346f5279b04f7a06e0d4bd330d54119e104a6aea. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:56:29Z), 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/QMFME1915519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aa9196f92614d59f8d1a3765ca535a2b68d8a146a6abd3a8f43786e0044321. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMFME1915520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6eec577896445e2ef0059c7e0a5072d3e9e5952b345cc92fe73107cd5952730. 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/ES31E2200346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f57b4300a0122f2eb8a01d7e2d47581c9a967449ea0089e33fce4bf7130d2c3. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/ES31E2102735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8980eebe7e3f154f737c242c8d971919cab7d13d2355d16315b30ff7df46af. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:14Z), 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/ES31E2202598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1229a9e2c5e86c48a82af37f250181f475e13b3f6814933f7bf0bb1fa23711a0. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ES31E2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35dac42ab05abe9b830cad4d6816b1c9df5558dbb441302150ea26710998dab. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/ES31E2400774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b252fe797eb884ec5dac95f001e47f6549423708cc0beefa6bd98ecf2bff8e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES31E2415133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089abf5975906f088d10b9de187b11313fe0c5dd93af934ca7f59fecaffa6364. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/ES31E2415136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25711fe901f3e3bb822b087f552d6fd8f67bca9455f3eaeec85b48cac9316fd. 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/ES8242544911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0940d3480ca0208f5a2f32fe208939b33ddd27466ddee1a15f3c579c1a70e3. 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/ES8242544902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6323fba434c2634d3d54fcca9c374ac4503146cdb72c9986fab50e1a23ab2703. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5151901607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2107faf74a3a7dceaeefe1d53d54e346169d904e0bb5bd83831d29c09ee3f45f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5151500127.