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 0xc7264d86883fc08582cea0b4b3108a71a9c5c0c3744379d8cd91064a85a57aeb. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63f8980f-6b0d-44f3-96a7-7a76c02eb29e.json and https://artists.proofprofile.net/proofs/artist/63f8980f-6b0d-44f3-96a7-7a76c02eb29e.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 0xbf92b1a2f3ee62f0ff2f3f8227cc216af0e631361b3ecb3c28f1aaab0592f7c6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZ651009374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b895818602b2a96f56ebca078bea25577c6e41c7f1d2e360cad7467dcab4fa. 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/DEZ651009376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c24877aaf44dd8a874eaaf518de94096dea94ac7fbeb805b594d9b3213c9689. 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/DEZ651009378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ee5b9d2d3b9512da1ea427855bdb18dd563305903316647fea1673ec17b497. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEZ651009373.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9311709a975eb8c5332c5e09ae89c94da324d48ea0692ad4b6785c5c3bdfc0e3. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEZ651009375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adbe076f16a608c0d04f2a4c79afbdc9e2034988c70426512ba7d162fc30a72. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEZ651009377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6248dd0a6dc1084a8c842bea742245edd8cddcea42d5de88402c4ee9b720960. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEZ651009380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc876c8501ff5868a4ec2847938ff489e916f2837b97c8ae1bdfa6f98b57efbca. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEZ651000520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1007c88c36b73562406e40069ab06b4a28f4b2366b63be8c9f6f43925279a9. 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/DEZ651000524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3de32a1e85e7dd1015c5bb707a5ed1e5c090a516c9e07891898c07a71fd0984. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEZ651000525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb59b18745864de33a24b286cfbf72b66b1fb587e67a2b1f30f1c26f063cc89d. 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/DEZ651000526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681bbe8f67b850be19039f8cab62ca3bce2d553dbe040d745d9ab1135a65fc38. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DEZ651000521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b0f357909000a2b8c4fc27720e55512b03d862c4667c3d43ceac745074a16d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEZ651000522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7157f0980414d91b5c821bc0f1935a6a74002ec38f98729aeb8aef86acc2d0. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEZ651000523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9331cce12d99c919e0805bee469f052664bb9bf47f4eaa3d4ebb46d143837e5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEZ651000527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09edd525519e94acde29404304b86ff6b168a70d1c71018a05b0c7b9dc70cab. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEZ651000528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0080811c0647ad1e485e3e625c566a97cd829a4728794ec44a9f05ba30846c2a. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEZ651000529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09f51a53560764da1ff109f6051acb8f1f8af5a11c7ded28a281c1026824f7c. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEZ651000530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb42137cb78a1df77d580431017595f1cb17926b8e2bbb5d6d3e9768bee8488a. 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/DEFC10600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1268106910803eaa2036769da83220877a5909fc44a05a26fb5096c6e9805606. 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/DEFC10600141.