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 0x93291b445f43e4691b6f8b1f403fe872f223f75910132b1091fe9ea92cca5723. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/988d903b-11cc-416c-acaa-278422da2100.json and https://artists.proofprofile.net/proofs/artist/988d903b-11cc-416c-acaa-278422da2100.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 0xa8782e7f8d25042e0fece379db277356d158eac7e4fdb5b484ca6d469669a331. 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/HKG732256945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e33377c654fe6b98589b909b65216c6ca1eb66a5bee65478e501a149f1ff3e. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/HKG732256948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ab02c442f43356e6a2adf845422021f1b9b8e35fc5ca1110465b2c5af0d303. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKG732256950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7995924b4f25db387bc7353daccd577218f9caa0bb92160a066e04155554462f. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/HKG732256951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d407d14fbda6e8fdc22ab8a90c2d4c60d5c6d848ef19b6c6495c6a874b5d34f. 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/HKG732256952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b87a1ea7f9a317eced36817cc00287c52dbbe5561ee59bf1d410bb5f1c03c. 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/HKG732256953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ce7c3c4553fb5c2440979f130e8e34b9c6a3cabd5f34e57534ce9424f2340f. 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/HKG732258045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaf8d05e7fe8705369414a91dc493192b100ab4f1e91b4eeaa9288942952122. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/MYUS12223194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4bd8d2e0e38cb6e6315bc1202311a73eb2c863a89d8ce006504b5375574caa. 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/MYUS12223196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b167dbb1f032636319f5dd1180103f55bca4eafe66e0da42f5c5c55773a3237. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/MYUS12223070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bd0260bb3cbdb1516925416ae8f529b0e687d0897517f517a0b2648b3081bd. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/MYUS12223072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0d4c771e6779171ca567a4eab345c8ad3db3e0a6cf3a3cb41be81f894431f5. 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/MYUS12223073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cf14bcfc1af9acc284d81497415e61cfe0a6d53a73ae06f8164b0c96d8e3f8. 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/MYUS12223158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d9321f0c3e3dc4ba06c1aaf82f11130081d5f4a777925b85228398a9979f44. 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/MYUS12223161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d14d064984623db12fb93fdf7da2a4a3baab882f04cf757d5e7e5b2fff2d43. 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/MYUS12223188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40036fa99754545bb62b4947c80322008742dbff29df00f9a0facb745afe8bc7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX201966296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19218635991890a432bf71d439fa3e87909d067d6ab51a4f8c4e40fe8a06dab6. 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/FRX201955343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc254c079de401998ed96a6c356ecf954724631ba107880c160e4e43f56eb21e. 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/FRX201950401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549feba94c2d5ebe545475be01c52c52d8218689bfb1ff80a8c63c253898213b. 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/FRX201950402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97cebf841dd741158500622caf3bda434b502263d83795e5a1cae8640571a76. 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/FRX201955342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aa45971b05d9374f43eb27201498203fb5264185731d0c131a222d9c1f091f. 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/FRX201940508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47244f3ab11375c7996ac26ba6f150c3899eb7270752f24dad237a09a41fdaba. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZZ972321672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8008712c080a6cdee47aaf8e32f41e688901d5ff9137bb62a5719dca864dd793. 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/MYUS12223146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae4333eb6c602ecdd25feb3591c59e7ccd34842ca1791bd3e04729d44e65e2b. 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/MYUS12223154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b167dbb1f032636319f5dd1180103f55bca4eafe66e0da42f5c5c55773a3237. 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/MYUS12223070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812a9458de0db9bf308aaab9ef4e115dd088b5d12e1e202dc92b11cc76d52ffe. 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/MYUS12223082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e428d7992354dc8d4146140a7a8eadeb101aec4f19f9e1147d180e27f3c2c3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MYUS12223083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846c1a54d15e965a5e3b66497c472ca8f12f91f57a026b1b50ff5023545dd79a. 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/MYUS12223084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73324d7b2aa8d768c339f1df9376a2779cc05c9c9e7ab1920f2eccf873f8abbf. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/MYUS12223085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb695294fa3dffa793822ac31607c1521d2d8b447c7b8868ced8a2294ef294677. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/MYUS12223091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81762f963d37af3709d9f07174f1a57b36f0a33fdc603b76315fcff3c0764edc. 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/MYUS12223134.