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 0x2059d75ca90b8acc856aff021ce15c31391fdb9d463bd06601895781290c9577. 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/1a43f1b3-5551-4832-84b7-7103f01ca649.json and https://artists.proofprofile.net/proofs/artist/1a43f1b3-5551-4832-84b7-7103f01ca649.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 0x81c53f29885d009db9c1dcfe5d12c81737107b60ad213cd5dbbf4d5a10b47ee3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:32:38Z), 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/TCJPX2377719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffc1573db27ca77eba699064407264949cc1a35626108f3f472513a074542bb. 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/TCJPY2310975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4453e43e17c01a590ef7557b7f3a086c04528158c9dd410ce76a6c251bea5f2. 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/TCJPY2343126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec053e3a2bd53940b917d0b68a5264a0f51bbf0011b3fd532c0ceb845fb59f5. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/JPU452410008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a04f42b270c31a60d1a683a6e95023d66298e60b7ed54620eabe58e4fb87881. 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/JPU452410013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506b6b9e3671d654047c9ee5aef2328bf7cb3915a06edfb8c919bf5def3ea716. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPU452410018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79aaec199508fded4f0851c5308aac87e56181bf91248a52f044f1283bdac36. 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/JPU452410014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7554553bbd6f84387156c3b2904bd35a16de41a701c24617cc3837fede970482. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/JPU452410040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096d1af90ed175ce31b97e84a43436499f6230ee33a5d667877a3687eeb61574. 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/JPU452410044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fa60dcbbdcf01f49089adc7c8b110120988cfda8e6c592fdea233d392b8b4b. 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/JPU452410054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3060e767ecbb3180beffbe495982f3c464465269fe4963d0e6b7a1aa250fc8c. 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/JPU452410062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096d1af90ed175ce31b97e84a43436499f6230ee33a5d667877a3687eeb61574. 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/JPU452410044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fa60dcbbdcf01f49089adc7c8b110120988cfda8e6c592fdea233d392b8b4b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/JPU452410054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3060e767ecbb3180beffbe495982f3c464465269fe4963d0e6b7a1aa250fc8c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPU452410062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13ace3fe78b6eef6c93cb08dda975af3d35c0245eb67e09a9d54aebd54f74a3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCJPI2538595.