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 0x2088ea672c1f503d464ac74e5daf98095feaf5af37de624aa020d80e2dcac50b. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8110cdc-86b2-4922-a536-db07a3eecaf5.json and https://artists.proofprofile.net/proofs/artist/a8110cdc-86b2-4922-a536-db07a3eecaf5.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 0xfdeb730c5bbbf453f186a07ebc9131a7647a766ab0780cac2898d81ef99b3347. 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/DKUM72100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2694963a4947a5d1149bd006e9bd2c46f7a01442318692df8657e3cc59c84f. 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/DKFD53092020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6f6e5698c9d295429d9f21827a340f3f937d857337f2b24fadded87b887541. 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/DKUM72100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd4723909794e181fb63bb6c93dc23deccb3058a6a683516db1fd24595dde2a. 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/DKUM72100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0195978aff43745192943ca77499be99478ab694cdde845ba5535b2b1f3e89. 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/DKUM72100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8a446a0db9a51643a9cebc27c4fa542ffaff1a55db6b127f8eac34437dc0f1. 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/DKUM72100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6e380141fe7a2a809cbb0207191c3f91daa3f2e65248493cf0c689b9aeafda. 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/DKUM72100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdeb730c5bbbf453f186a07ebc9131a7647a766ab0780cac2898d81ef99b3347. 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/DKUM72100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f25e60645e799c78d9437a74548c0aed51716ed54a5308e351eb069e2ef606. 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/DKUM72100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcb04194c56047003e1ce4c8771d20d926920690b31b7cde992330c7667ea39. 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/DKADG2100248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0affe2042201b11c89aeb32e1788a4624a1a8f5691be6a5c04b7b6a7e2ebfc8. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DKADG2000526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99880eb85fbdf4a3023cce5635a9db1850069546ab2c2c473d73450fddedeb4d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DKADG2000393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676cacb1e1e1633f3a9318173c786ed12fe4c575a5e6da6ee0382bf8ea337689. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DKADG2000241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31171eb0727d189ff08c5452ee97e55dd88088135bb75fd5bf5da1e2b81f91d0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DKFD53092019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef33ed6d4a83a6652a339ad08343d89418bec46865dbdef78737b8658f0d7d13. 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/DKFD53092014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781abe0460eacf13288504796e90f6fdf05304811fbf715e56350e80f7764dd3. 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/DKFD53092005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b076ea96cd505974824e8e60b353aa454046b5eee46621d86c429809dec86c. 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/DKFD53092003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0286752b0ddd2b5b884ab5e0b6061ef0ca020e1ccf0286d219a96bc4588de6ed. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DKFD53092002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb12ce28802f6fa3bea0593db0a3891415288c5558d6e8466c3f1a3c712bbbce. 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/DKFD53092001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650f5ec86412a2ca3050bbadd915bf5a887d2c23a478c1d15f781e33b37e30b4. 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/FRX762333820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa56018bd3cfb34a38cf13cb998e8a88543f7f15ae10d4158a28061cd22d92f5. 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/FRX762333821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2b0c7ee80650193f40cfd6868dec11cc7bddadd9000a84d852c94e24ab2861. 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/FRX762333822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2281c271fabc2ab1342e319ba816c3ac75cd2b516a496c0efe7a81c73a70d18b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX762333823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a5256c1cb783b47988a0cd4956da278bb1a053cf2c90fd3b1c56d87dce9f72. 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/FRX762333824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7f56236f26a8b1b18d6197fedc57fdc87b467eec1f2cee0db89fde47276b96. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRX762333825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7d9f35ee8d473e24c14f93b0f7bfbcd6471c9621efd52a01f3098828870f1e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/FRX762333826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8264b259277ea7ec17b285dbf200f8c5fe72b788a5dd42785e9cbe5c5338ad. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FRX762333827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2589f3fa739ad7b2cc7b1cfa46f0e7521faf649ade5125d6bd63eebabd67bc87. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FRX762333828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4ec5017c5ae127e16aa7f880ad544868f33e80cb9f589601be735732f4a9dd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DKFD53092007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5343f8cc98d4d391967aba100fb9304220ff90f5240c3f7549fb7cd8d609ebb. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/NLHR21107531.