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 0x680ec9fa0cf300a5bc5e05cc8b8f6ce19fe5504df639fb97206bb059d26cd72b. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52dae9b1-a0ee-44df-9e85-cbe11968b9a0.json and https://artists.proofprofile.net/proofs/artist/52dae9b1-a0ee-44df-9e85-cbe11968b9a0.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 0x9d3b3b4019fb13590241024ee1218f769259f5b56ff308be461dfa65e9e5f7b4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMZ92048652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a96fd5ca1b145dfe61f4a9023ac8c2d46d39fbc915001f6548acb277f483b7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:43:59Z), 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/QZMZ92048651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057683141df88616816fd136ab455d3d5d9f46b72b9800e7299ed526ff187595. 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/QZMZ92048650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd712bc219c3e9ea2ec29dce4aee17cd8e52076ef4d0218842263e35e924fe545. 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/QZMZ92048654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78af360aa4a453b5d6f9e1f9707874415ffd7b6e2a34c4a31be3cdb9a345e8ef. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMZ92171474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e9133d662c004c50ca50887f95b57732bfbe5d59ee487c53b8fb0e093c87a3. 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/QZNJW2162333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748fe5f6a0c936cca3ba1ef9e27dae6f1d1426fcf8b467cdd7b5a43bc1ef4e05. 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/SGB502365303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe702f1509d73953289e7dcd81b954356a27443dc7b28f2c3c1993ed0af4e38d4. 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/SGB502365304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be31c3464e302802deb7b0c215a62edf9f41cefb5d97c9aec8a6301adbf23f7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SGB502365305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3807637607eeb510fe19a82477a247af716aa002653b309e5bbaa734c96700d2. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/SGW502307636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab3190f517db947187fbeb555d83dbe066d0eb73d8430681385032bcd38cfb4. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:28:59Z), 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/SGW502307638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad28fa3e6cc3e5a63650896be848fe009bd9e01478322831780c11e4877a4fea. 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/SGW502307639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef17204dc8fda33bb8401ea1db071ae4900927aed57cb63ebcacb3ed8d0ab3e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SGW502307637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6843679cdca93c0d19720af8089bf5c9f6b65f2eacee237dc0d877e9599d3e83. 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/GXBAV2350141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac15f9c99d1d80ec463bab611974b959f96b6928601c171983539c87de1d65e. 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/GXBAV2350140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e57fa91abe0ac5f1a29bafad0c958546acda07a60aa4b7e2029dbe7b985632. 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/GXBAV2350142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906c66532dc8fd2fee73ee254030706270fb98425a64b7cb02a2182349063fca. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXBAV2570391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfc9661e53c74c0f8cfc68e339b55b00f80905d73c54ef0e48add4beecf34da. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GXBAV2596140.