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 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 0xfd2ce99f2da0b520f517741dce09db7fc664504065d4e971af745dc315ed3cfe. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41cf3aaf-7b83-49fa-9571-d2219a71dd33.json and https://artists.proofprofile.net/proofs/artist/41cf3aaf-7b83-49fa-9571-d2219a71dd33.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 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 0x7dc667e001ff613fd196b48787ac1779a1d05ac48d8298acb7ee1af1aa33a38f. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZHN32154335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7586adae34ae72590f231dd224aed6a073a260e1721b164348d4c86502d252c8. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZHN32154338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8cfe6b832fe541310572ceefe1e59c43a114522038daea2be2ea8c759d028c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZHN32154340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d5a5a52e633625c3aa495ae0d1b39a9daed332b50dd9820396cacb775d113f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN32154341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6901d1d2fbaffd7a6e84031e7746be78c8f79881358c019159d99254fb558174. 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/QZGLM2286509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4def8e32a70a14f7186ded7d13ff1587bb73dee2e827174e9e99dcde2f5b5b26. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USJE61002355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbed92ee2aef4dfda60994178429fc32a80f67bb0f754d3c0ad177771f2c9284. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USJE61002356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe3d51e5acb082b21243cdc5867e608ee28504e59f2804068f21796b6b1f72b. 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/USJE61002359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e023bce517f21e907533ef1b57f3567f2a7c1e99f1838e1fc79f48fad210be. 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/USJE61002360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9720d26829ee77a5c1b8968ae032980b9be8c2ba4e577e659d4743717b6a25. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZMZ92253425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3424f2f09b1eb896f8bcd663032b5d225322126d1d231ecd6e1c1105cc1ccd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNJW2211395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0233250bc96701b6727e07b98fac266fcc192b7c16cf654ba1e6933afdc628c5. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNJW2211396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c8e97b241a839777d0537dba029a86f231a32f504777df2e3bbe9a82b19f8b. 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/QZNJW2211394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417e385f9a8850b3aaf4f557e16cde9facd208197e70fcaba9ec022a9a2c44e7. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZNJZ2219064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4312b844ad167a6eb4bf9298978451d38dff9942dd4938e0e00cbf1bd9aeadb4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZNJZ2219067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4da98ba632f6b7bb03d8006f6ba7d270ff8fd29681c818f468c4556c4e572b. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZNJZ2219070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c5ff780f480034bc26a632d3849dfa32de633394237091c6919e4f5ae40967. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZNJZ2265804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504173f1e284bfff697207cc27be8118e5b1dcb0581088feaa4114be04da1ad4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USHM92077136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921819073230eb652f7f769555bf6e8d7a916eb4107051b4783d6e40c430b183. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNJZ2265808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6295bfde72bc361f29a06dab19915b70c2308a6dc4160c3f94430018724797a. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QZW9M2223362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3511cc34dc1722a61c6fdaf1a22837a57b2308c893498cb4ebfad2051cfdd165. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZW9M2223364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae6b1be1c72dbec6c9334ed434d2502cf7fb9efb9ae202a45d31209c22e0d17. 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/QZW9M2223369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45028480e92e68bfc9ac74b0d8ed96c6fdfe06acace44c4c4c2d96f3412f32d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZW9L2249925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d85faa7092f86c2baa61f8b26aabf705f4370f03f81c12288a2bd93043f3fd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCADQ1895883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabadde6d77340d0b78a9f82113be360dc4b34c1e149770a109864cb31aea8a76. 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/QZNJW2348145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1db520c4be40aabf050e7b76fa32240de79b8cd06cb3073d1f78b5f053ce8c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZW9K2397414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcbf26245c478b5f9ad5eeec738789965e8212da70e217b4d1dd25f0d462e87. 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/QZGLM2524090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3083e79ad57c5c1eea74c60ff446be8c47d30779dacd9150af663510064c298a. 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/QZGLS2441543.