thumb|alt=Tom Curtain an Australian singer songwriter, horseman, entrepreneur and family man |Tom Curtain promotional image in support of his sixth album 'Here's To You' due out 22 August 2025 Tom Cu
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 0x4e50cc86e3eff8c236c870c960a7165801b10dcae1c99ebc61db7c01a71bda84. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7826389c-51c9-4b99-bdd1-57f7cb8f3c9a.json and https://artists.proofprofile.net/proofs/artist/7826389c-51c9-4b99-bdd1-57f7cb8f3c9a.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 0x552f62683fb1fe327b913b142807c1b900dd7e908cf46927dd5e22eab68cf872. 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/USHM91700656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b121628dc69ab4b8e6dfd7147ecfa61532419b66e3820456bca6e63d10f0005. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM91700657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfb9084c18409fe9f00168dea59ced543dce22bb1b5d37e3f4f8bc97a69c2af. 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/USHM91700658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb6c3878c95d55a2be418a9b3b08afbcc45e655c1298ab4a49a9f565b2668ea. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM91700659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6ac0a9c067c7f50d24ac77367fe58aea344a914ffc3300eb4fb22bcc7e68fa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM91700660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebea2337e467bcbdeaa1968ec891d6f11f559f6d2a9db95d3252c46b9cc155b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM91700661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e066b04f743beaf315e183cef0349690a30645fcff5f638d0a766baee6e5ffb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM91700662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99916a711c26dca82b92d6a3f2b41ef8101569fdee415980b40be734a9d5751. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM91700663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e1e6a9fcf5a106245deec9c6db403e343a5824b37cdce5bfb184b222f7ba6a. 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/USHM91700664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b1e9ecbb5d8d2530d25661de6fab068fc830c4cd9b072772644657122352f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM91700665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df675153da749e1e44a21d67d7cae65db0deacf9f8827cb0928b27964f2c985. 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/USHM21829782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b4dac014a612cfb350d5ae285e1846972a0ccf4d18d3bb96a2b60ac4e20f50. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUYWK1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe571cf695f9d983cf686c6c3debfc1ecd05c0d3d58fffbedcebb4b8d9e687151. 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/AUYWK1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8710dffc4ac73d911352500cf951b9cfc2e524e954dd308f6745275eee128b3. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/AUYWK1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44acbd261603607124cfbb3c8f1210902c44d52488dfcbb187abf8e26fa8ebb4. 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/AUYWK1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0004913bb547307356feba57f93d52da1d43abbb35ee40dd3d6c8dee2623318. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUBEC2217135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adba72f1e64cbec5af704c2fec57453de7b04167e0aa56307429ec56e457250. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUBEC2217137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a7c6e75b2f69a39ddb0136302571e5008d3183262332ebb8a173f361e77f36. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:30:43Z), 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/AUBEC2217138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d3a5c5aa766be2f45e07943ca423629bdf100089c41250791d6684dd009ea7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUBEC2217139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6299a0a8e2888cd4daff512738c0fa65dad0831fc95574a908c4537e67ff7ecd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/AUBEC2217140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8044e8a2489aad425d14e9378935d5a6f727a67d3006a617f4b891ae9dd2357d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUBEC2217141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd66d6140b0dfb21932f1cccd5db8a919e060ccb51a96e58fd0749531651513. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUBEC2217142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea50cca06125ed43899b2a305041fd22e4606215b3fd44620423c6387c645121. 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/AUYWK2400008.