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 0x9915ad90f06cb958dce8cd8852fed2d2d81c9b0b352b56504f8dca8babed49d8. 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/6e4c0762-afda-4886-bcdb-cae12678a2be.json and https://artists.proofprofile.net/proofs/artist/6e4c0762-afda-4886-bcdb-cae12678a2be.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 0x31f5059911f5ed6c6d6dd926317063a14c34f6486a3ce4b4057beb2eee6295e9. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DETQ11400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb736a0578da7dc6273ec00ae3f8be3404baa83911fba1f4f752628c69155308a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DETQ11400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e895012d91b611512494556ad6fc404201b5bdf191c2cb23e5b42459e8258e4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:43Z), 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/CH7811713822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b61f033adad14f731ff8487f7a1a2400a66c23290498efdc67c18004b7eacfe. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:11:55Z), 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/CH7811713833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49bc2fba2a0ddec70c9d300c6655fe07e7e7bb908d17a7b0ce03bf30e6d32e4. 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/CH7811713839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bb74690e734978d1055b9d6b3f2434ac351c54884a4470f1822e493b019866. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CH7811818097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa123ec81c797bc943f58ff6884067969f02f5d191d795d3f5a4157a921f314bf. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:19:32Z), 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/DEUM71901664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c15865ef8d53fd119d6f8400231acc73f087973e453e9c4bcdd5eba0085079. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:02:03Z), 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/DEUM71900618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44795749e1f49f415de2af7e196c89dcaf6ea7a24d06034bf240fe104e4416a8. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/DEUM71900620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf7a4d5b2b130511c5f8e47be1e67c0ea61a9d3daba03bea878971337afa659. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:05:56Z), 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/DECE72000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c457e435d2d9a308dddda5bebf9914e5dc0660b5eb564d19c471bf4281f2cc. 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/DECE72000345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfc136f4634d558a593ef750d1361b3ff10778d85844e0efdbd76552cf1dbad. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:03:20Z), 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/DECE72003563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae32df9abd3fcc9f2e1ee028c86dd8d039f40d6bd275c6df3e992cad82683ea. 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/CH7812074456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c884cddd148898a1423ee4a42d362d547a273b19f85ec37fe60af4257a4d10. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:09:31Z), 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/CH7812195737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc010ce7343333d41005deaf04a9766d1784ed50ba6a514bc3ff0bbedc7b45cae. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH7812196988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097c1e52d891b067fcd6888ba9f9d82f9b183f6685abf9c6c1df8099dfb960f4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:34:55Z), 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/CH7812198490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd609b0d2bb58decb566bf48af6dc0509a73e1277ead5646858c3a2c6d51cbb. 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/CH7812100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d935b02ca114365e4259385ac9ed191b96c9515e58667352a88d25059dee52. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CH7812103838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f43eb0f8375fc69a85b1d089d58b9d50932510a46715e6ac521a1325b82035b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:45:33Z), 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/CH7812213610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6053c0b951dcd1ecbe5a951b5e3b68a812747ff3e69c9df0acc1e6aae2d52ae4. 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/CH7812233186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9e2e52130b29b87d953c3b939d78133bf277589069a901e1e7784c7d43b9c7. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CH7812238710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6477112891f66985755032138ba2002273c29da480f7d0b55a51b9617bcc8e. 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/DETQ11400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7a305aa9298f7bf53b9e38df5a57a328ec0d7807f8c8e577dcfcf3eb2360e9. 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/CH7811710385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9140ed693f3bab44f82386e0bd3380401c572acaa51d2b33bf6b4c6bf78d225c. 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/DEE861901645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f99a5c90238d9a7e2bb44dccd9697d24ba010f510d6ed4a4ca4ba2997d674a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEE861807453.
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 0x7a95da49515b89bf55a80228ce7675fa3b2ece911ef3b8ddd70c381958bf3ae7. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEVY81700601.