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 0x79b7338bd37b00aacec6e7cf4d708dc8a62c1b87686a76a66fbe624baac167cb. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcde2225-fce5-4783-b6a0-dc12c1062813.json and https://artists.proofprofile.net/proofs/artist/dcde2225-fce5-4783-b6a0-dc12c1062813.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 0x031301ae2699d23f1df2894c3eb826a26762b0fec4d75cf9b81a872036ddd900. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMHP2309938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057d857f096f5ae347044c67871c70584fdb15cb74ceec6a543096e5d8e5df46. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMHN2327450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f6b72542d6c1aa1a80fbb698427adc8ce5b581dd38d6f07389fca878cfaafd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYZ2431250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1d87b6019463ef5b6295126a3166c86d2f9d7b25649b79172282ec72dae639. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFYZ2431255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa92dea5a067e9d3675f3ab062912cf158c13144e097c8efb8584e198ef9b0eb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4Q2435646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a26e2afe4590c74ea7285b1fe3de48ea7e72cd76d231db3dd5121fe6d722e47. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:02:29Z), 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/USL4R2455492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa92dea5a067e9d3675f3ab062912cf158c13144e097c8efb8584e198ef9b0eb. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USL4Q2435646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f1ad20c361393837b96c2f3b201cf5fec3b7d7bc286ed1d021db15aefe91f7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USY242432192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e5c579c827712ddb58519f279e1c05a761e3e05d4e883b0ecb1b93b9433bd1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USY242432195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df0f2d76adf83f9b78b90a8a0dfcfe9c43ea6f2ff516b9b7a77306b0e972772. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USY242432197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7f82190aa490f71ad9414eaab9b61a04c04dafd133031f9484c2553ba61688. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:30Z), 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/USCGJ2529716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c34b11ab5bcc0c1af05265c7e05e622be0be93915550f91b7eb485f7e1dafe. 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/CACWV2584575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea68a9b021cdc40f9bbf53d8510f2eeb57194b7bb983fab7d1c8c4d6e820e84. 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/USCGJ2598103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fbd59ffaf62275797a3c3e1fb9295979dfec9dfff2231bfccecb36c2a2df74. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:38:35Z), 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/CACWV2595409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75189d3061efffb31748871c87a85d647f4909dacb7b4ea0f74b956d76c5b42. 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/USHM82510753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a60abf9edb356903254cf27077c2d0799847489c7920681facc398db4acb38d. 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/QZPJ32500608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3acf6939b0f7ad6d0f6d217e59596bbb216967534531f2a4a2531fa83e194dc. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZS7J2508218.