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 0x08cc98815f91ea5506fed54208b4e44d157c46af9ce8709852af0faf57ec0aca. 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/293bca5c-5410-46cc-a34b-751a8cdd5e03.json and https://artists.proofprofile.net/proofs/artist/293bca5c-5410-46cc-a34b-751a8cdd5e03.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 0xbc2a3251daca31bc8069201379dd7925ddc039a560dc0b8c871cb365cece4f41. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/DELJ82000845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf05393501cd5fe93f5b3d56f788da0c59d877a7c460aa9bf6faed93ec524d06. 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/DELJ82079652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bcb5c4e6aa44919783d0b405def53c8f721e4a8a0bde52a9feabda97449ab5. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DEZC62334929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8979c0dd2d9c2615b57b005778719f63b3219a3d9f453f17bfbdd50e94a47031. 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/DEZC62334931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472734da07002bd31f47468831a56ace0f681a597f9c35ab1e31b1e65a9bc51a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEZC62334934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03831640045430bd627c30803b4883fd6b195a3961c97015432289906e15dea0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZC62334936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a717011d0e8d740e0b297e694bffecc08a1c26698572e3cf32f3113a18b72df. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEZC62334938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf659b422721edff6cfe8aebb54c74edbb383d52bfc0487d439009108594eeb52. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZC62390033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7932a0ff362ab3e1481f3fd69c5ef6b1459630c3d92b10c0b2c4ae5c952404b1. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/DEZC62411867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bbeca369a6f2fcdd6665e6b2ee5508312c04f8e3c8b4fcda21f912663c4f39. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEZC62411870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454ee38f55eeffd6d086971959694fd8f8dab74809fa23f4094f86be2b38aa2b. 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/DEZC62411880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b398502608a8a18a8ac3d7d5e429250e64aad2f167da73ff6ce696d30a9b98. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEZC62436225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f98e085a3a71591359820f3974c98fe38277d4f55b3dca8d72c7eb3b5f6176. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DEZC62470341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7dd879bb43b209a531c6f76119023fc938fb4de89e9aaae4b8923edeb3b262. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEZC62470342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c127e27fd75b1d078bf77e2ba55bfc949cbe1148c895750dba80e999eab3bbf. 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/DEZC62470343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99a324a0a8a8d49844426a623781132768acbc5ec447fb8d7c2f0af5d2afe8c. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DEZC62576974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191a454300bcba04e37138110315cf2c7fb8069a936cc087763e9b4fa44b9e7c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DEZC62576975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29d2578c41fd1c832965161403d21fec6875e77f425ae221719fc292560934f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZC62576976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6d75be19e8b9f69cf600e14c94569bfdd8396e8a7df5b3b4914e8f825350c2. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/DEZC62576977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3e1df73e06b0d949f98da481d8bbcdd1634f16dea15d8369292e51d424b48b. 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/DEZC62576978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ca9461a0c85b37457611edf9e5a596f5b999b69f4df1ce4755e9481af23cad. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEZC62576979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8513cf47107c7926b7aba07d9a00c70b4bbe18f3718869aafb15e71a492265. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DEZC62576980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cbde50f9a55b061696997d57687e3909396fb273788504c80e429735022639. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DEZC62576981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fcedec9c5a8f831247d7de79b061d5e1658a91d41ce7b1467a83c2df856fe8. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/DEZC62576982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761aa320360fac2eb401cd784a545d2c8136f69924677f27470284f0697392a1. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DEZC62576983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cfd77cc30b10e0e58e463b72c6c5c733d1ab0e213120de12429cd3c02c3ba0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZC62512357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cdd44985fdc235f2bbcd49724799cc5407667b039c4951663b3ba19f0f88d2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEZC62512358.