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 0xf3a6e108b176f38cbc46993b0750a2bcc0e643aa515c5cd902a99446bb4f90f3. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ce8afe5-4781-436f-982c-ab011ec7149d.json and https://artists.proofprofile.net/proofs/artist/0ce8afe5-4781-436f-982c-ab011ec7149d.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 0x53165cebe9ed0ff91ee8aa3e2879b19900475071171ecadcdcdfec4b61a416ef. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USDY42431354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a03bd970720efee7df2cecd19068a1d90aaebe17f65f980515099bd26a12187. 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/USHM21922995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a06891acc384f21b29192e30c05ede83b503bc946943f2220bc2248a424adb0. 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/USHM21922996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf12ca75623a6c654b9c94c982775d38be272faf633dce0dea7f2ee32718546. 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/USHM21922998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a38984f3fa1b9ac903344ceba97fd322596b084628a0413910650765c12a6c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USHM21922999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cfed3f2cea9755b5ed61518c704622663c062490753f921212381e5f0e7b6c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM21923000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43000910fa7884a5e6b86520cee24637c35c60a3460344359a7d5b43dfee5565. 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/USHM21923001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3fc506ffa523b1a04bdd42260fb7f2d4de69105d67e231857ba4fc85b6195b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USHM21923002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66357a5110b5b74aa92886257efe3f2b7a3ed51d1706bda95fa18834f086efc1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM21923003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687c7e5d5c0bedffae7d2c26deb5bd0ec0183c1cae2e2ed77466b5affbb25aca. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM21923004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfd7543d929cff392d233482acc5af44ae1cee8fe3294b3075887330f6e4cfc. 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/USHM82446235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a882dce15b370dd058fb8979f39db815f3a6365cfdf63b0b5de63b569e5c22. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZZ8B2389046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69695e16addbd7331d2dfe1ab8176fdefdb7f75f7652512e6a76b3d8a86d433. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USHM92144341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e3b33ef8d4b493f999f67601a5910a91652e886494c1aea61ae0eb0f3a1de8. 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/USHM92041582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ab56f91c0a81b0c6cdc6de0cde63f6367af9e570e54bb57de731bb8773ad72. 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/USHM92041583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cda49fd66c0cab2f9d9c9bb0b186c9c708f3c02242c930bcdbe05f21d56023b. 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/USHM92041584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe097da375701ca5e8d5a7e19196f603794d10b33580ab27c1979026f92f3ac. 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/USHM22011384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f8aa0f163701eeae90df65bd0b913dc2aa30b2eb217d351bbc6f4f15e791c3. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USCGJ2059759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb2e4b4c64e92cbd2e13233069a7fbe4ab22d9b1728485d0a8fd76e5b7d211c. 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/USCGH2021690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a69d5d0094ddd98cdc6120c1bb264f4add8691269b7d0132222119d8f0a261. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM91980404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd20e4c89becf9dc0d148622aea69985ff9d24f27b4745f462de1d736cb7cde. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USHM81886476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db017daaefb4b7a6351930f3ab299d91bbeb31bdb9c9894e4a182cec0c51b00. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USCGH1888391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a4119423c3de552e294c9133543a4b8a5a06cbdf962a101c578e4299874c69. 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/NLQ8D1700235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c8742f6205f1f8d95fdc75cad4c16146e141b48a8b8f641bc9af1f6935f773. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USCGJ1794205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48709efb37887c4467bda930803f54989d15825b0500ec1f1adc47add48d6dad. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USCGH1768772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a45b5b93bffb370bb3a831e96a2ba66da4faa4d445f3d10a44e42fb2a51e71a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USHM81662858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31070b451611b4d391374b3bed552123395209646fbae945a4988afeaf202208. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM81662860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40f0487a3749b2fcf7b002da6e21dff00dba82963e6e9503d7354fe8844a552. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USE831587476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1f784b2290cde408396784b1ad15118e6de899ac3f17af03b1dfa3e96ba62a. 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/USDY41608371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f111e5e88dd83819193f6eca0f62450d9cc8472a8ed988770d40949944aa4e. 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/NLS241502328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9e7cd2d55d4a1c1fd811cd5c0ec0915c369eae200a384f1ecaddee462e73c3. 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/GBKQU1391078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad70e366b8d741a3539390221f185f48865caeec62fb545bb6b4c15aa8e5c6ba. 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/USHM22286362.