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 0xc7317e8ce0d988fcefd4b4de47fc68277c4084d203b8db3ce6fee95216de96ba. 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/45341b45-5adf-411e-9e13-e742e4cf20d4.json and https://artists.proofprofile.net/proofs/artist/45341b45-5adf-411e-9e13-e742e4cf20d4.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 0xa8ac8a9e93ad32e93699f609a21ba8548a3ca98d02081ce8c8bc96b2730c6988. 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/QZWDD2446579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106208f73da064a026c9f5bdba5a56dd8f55144fc00871bdf8d47e1a3d810dc7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWDD2446578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd32325984d76832e7c3cd2c81bea56cb7b3bbc5c9a1d7f6e03ed2bbbbb7cb5c. 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/QZS7J2443285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3673159ea6d57582795109e1876468c76a73cf5f11f5a41ee348d14fd14f65. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZS7J2465949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03a654639e8336aee764bb7dc5753910793d4208b829c83025b185a260d9685. 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/QZS7J2411891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffb895b17652bfd6394e91608c5bf5d413cd9b98f369b7bd71c0099894b4dc2. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAIV2454272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bbf712f3f88062b3012ca579fbe0a48845ad8f52099d80bac57f0644946ac5. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/TCAIW2464050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a131f6e74e5f996cd5ca8a23b3c2ab6d656c14db8738fc4f79b8aa4ff32e4a. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAIX2464177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ca03eaba0bb0f21aec83a4ae4ac0043ab1ce0a474da2607ed792c5135a3771. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAIW2463780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf512c6a02569c5c080389c62f656432fe2d860f1545735e76eda0af5a9fe963. 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/TCAIW2464115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0136ac38d2d071b6d27cb6fd1f947de89ff781d09077d0597a700b27d4d3a2. 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/TCAIW2464136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dc65ffc6689641a0e8a0d7bab7cb21e640b73008ccd5967c288ae19f2ae726. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZQAY2561674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830c7c14b1775f6fa9e5457490dfb59b44af517d623828141973e61969d07d51. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZQAY2581495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc7b30a3dbcdfd03cbf079cffcfa7e1d9ba9742b24d64f26d99438e837b5b79. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZS7J2595379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c298c2f0066fe12a4d5cab2898ca7dc0c26b2ef8e4062f894054055469e631. 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/QZS7J2542087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc655bb0419c09f393479f03633c6a677b5eafdb276fa0a8c3dba908b92a643aa. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QM4TX2568563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc593fd6c085ca19a2848499134a542538073d14fadc59ed9f8b269de621d9692. 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/QM4TX2568430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b10616292edad5308a2add1258406e93c25423133a82d061a4c3916a7e5cc8. 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/QM4TX2568545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f2c1c506921adbc91a4fa429967198e616a3a1d5bd5db242f37a291a59d460. 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/QM4TX2568517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2684a1dbb05997f459a4d1758e2aa6cbbe8e20a09377a28129031873f570b84f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:26Z), 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/GX3Q92507407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f88dac36b25a47a0058c428b34f10047f19e6f5eafd5a1e5952a031ada4fd0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM6MZ2598766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6295076cc151a4e0f913abe92aaa49da957d0fbc0133c4d5c7068fc4827d2f3. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCAJU2583776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c04f76c26726a8c82511d0343f4cfb81a5c3740a109e671e0c22a461ebb434b. 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/TCAJV2583780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e4c9a91e2d3404e2f786bab8c8ce6380a932bb24c8d0f52efad1319ee7bba9. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAJV2583786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2840f7ae1e94e07c7cdc9c6d5cebfcc3a94d7bcae91ace050c38579f4948a13. 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/TCAJU2583788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2debdc40e264c640ff0c134d93bc38bde4a25d1acaeddd2e646f5bf8eda5a391. 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/TCAJU2583796.