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 0x08e98f3b73417a2273df46a5dd90dbfe75ec97e66483c27402ebf1b74a6482b0. 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/562020c4-fc14-4a31-9c93-845ede6090d6.json and https://artists.proofprofile.net/proofs/artist/562020c4-fc14-4a31-9c93-845ede6090d6.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 0x4027d2fa847069ec2ff0a0035e9e2d47fb065d38b123e60de45a1a6046e2d480. 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/QZFZ32446874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd62c3841ad4763513cb86a1904ed276d271a5958edf25a6d586cda2bbfabf34. 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/QZFZ32446877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e86a88e5136a2ff5e6f430f1534492039598c6649806cd75d8559ef1979e48. 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/QZFZ32446878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc872c9f11099303e734fb717e0cfa2f5af8bdc2c982518bb6a865f38c3328c6. 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/QZFZ32446879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bb99602baafdfaa9c98a9d0199dcfaabdd1ae6a433b3019eaa6d5b172ef3c0. 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/QZFZ32446880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dc2436581c0664aff9bb553c2c5e96abb99050d85aa3789be4cb5af75b767e. 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/QZFZ32446876.
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 0xe7d11574b37a2cd2a4eb97841ebcb54909ea83fc7c4e6e2e87e17134571ff4dd. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QZFZ32446881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d7bd0d9b3969f20d3dc88cf87a2082d0e3f023022ab008cf7ae55852a09403. 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/QZTBB2406179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68106dd9796294155c5c02e4d52c40cb2678e6b1e5a4480ec240a3b5619fedcd. 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/QZTAT2472568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13268cb2a4f324dc7e68094eed36a133fb371f8bdaf7f9bd7306fc239e8f47e2. 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/QZPLS2475150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3987ab00372fb1a5a2d2416dce9af49bc498960ed3986a7c1ee0776e14d814. 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/QZNWZ2433313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282a31184c490a9674e75d54997258985ffc0f8b0b679d249f304653a43f548e. 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/QZNWV2400369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b45abcf88c249ed39915decc92643eae3d633787ac65cfc6d08601f23de4db1. 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/QZK6K2443463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a82d11db98da6d11b2aa3a71e69a0ece8c6dff09b882d2648329f36048b4175. 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/QZK6M2432727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc037ebad6c778d5e028d9de690ccc446b6df31b88abf4f9bb69bea89a1dbc2. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZK6M2432726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11172987b1233301339f768554fdb4d7d3de0bbf9f179321575cf546cc7f6cde. 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/QZHN62413094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d724293ec7ea288c46e45a206fd8b41026e817c11aad1eb77598ea700f840a8. 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/QZHN42408409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b64c9879b4571ccd47916668bd48ac63a004b11b9335ade28a992cf68662285. 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/QZES92451643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6be7484a3bc68baef73571309998f2ad50a10c58bb2bceff0d04684520a2c3d. 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/QZDA72428622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46e4b389fc6d5612094dc2d0438c975b48d5f1d26449ac292cc3326af6b26c3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDA62406201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecce5de6ea8f66383bae2778b44c9fc4db09ec96a55366729a15efa0b5a89d37. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFL2331013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ea2e51ccc24af1235b80dabb7f8ef7ed109aecc3b2e84b3fea76390efebbaf. 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/QZTAY2378101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad68a25a212792c55c95454baafc4cd434e89a6bbc4055047eb757fba357a7fa. 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/QZRP42364192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748b2aefc0a761e792c1c31acce3c873106403f39a6b0114bfefdd14b143daf9. 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/QZRP42341002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed1179d7d83839c2997c4ca3892d28bae3de4022630c5a4d56a825bfd9ba58e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6F2358970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56819b75c676adc8873a8bc7b6382fd0ddbba458693f908decd4e4de408f6e6e. 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/QZK6L2357555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4a2dadd0d3f13ea61d7ad00bc1ca665f941b4c9d5ef75f52971ccc882f81a7. 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/QZHN72354952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe100c3e93adc98addb6d6e1283aee566304665d5d5cbbe44af845a62e4b8ae14. 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/QZHN52336202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66733861e29701a868705a589f487a056d565f87642bc23bed5a75902d8dad37. 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/QZHN42317824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde9c879673d5236ae87fe0a9f0d5558c2a8d72c153f65ba53d7da1199c84acb. 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/QZES62316122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866859e531f8faf09344f4c57df248cd47905574b717430dc0127c687a462bd3. 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/QZTB52272972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20447fecdb97bcdaa2ffc036bd9a29d7dd2752776088f0295bffb4c5ea34d8d7. 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/QZTB22223333.