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 0xce514419c1c910b0621c3ac8af671c3384a0736f5d47314a4628aea7ac0674f5. 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/ebf7574a-ad96-4b83-944b-4040cd37493d.json and https://artists.proofprofile.net/proofs/artist/ebf7574a-ad96-4b83-944b-4040cd37493d.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 0xc2ab27b0d38cfd2ae4621f9b0e8dd1a8cb04944dc9ab34832a6d38ef1971b138. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR96X1949005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8e9462c19a2a794eacdb5b089444556a27faeded360e1ff7e390c59d09d4f0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR96X1949011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab104d9d8b7008f5e02dad447330a05c8995597e22c50cfb4ca3c7069d937bbf. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/FR96X1807002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e4a2b9b5da8ed09befb114cdaefaec91cf2beebe342998fbbf013f3c9aaebd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR96X1807003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3677dd9846ca2157d317fe80f99b602c7d0e1f83164af79a5570e37e84364a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/FR96X1807004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae27bd332965803236a356b428d9b29bd3d9186b08dc7ecb33328be9bb1b5657. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X1807007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74351504f367b554086d4385e63aa056f813aa535b46b42eb1eaacc3bd95c9b7. 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/FR96X1807010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbaba0409c79d33bb5befe31a17f1becdf4631cafb6d1c390a9360795e79a66. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR96X1807012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55d54e4047e01e1c185a23f5806df2a97389cee44797c99d0b8ce140d8aa8ba. 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/FR59R1895568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de8ee70c045dc61a866123908fa6173517e64acad6e4e7f2eadc60176e2368c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FR59R1895572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d745fa7726f0a93dbb87c75aa0bc2e9a7a2ca0908da83666fe1d42ed0cb3d67. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR59R1895576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cd3008a5f65bb85b4d82a7b8f68a2942f75675c6346bd49a9b0fa6dab68b04. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR96X1988511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2d1440a3a64c047f4442b90191abd5192d1ca4c2bf6207f47bbe07bba2e167. 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/FR96X1988512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021f5b6504333abeb5c0e68368a915be9c693ebf95d8d4f049f4dc82ab6d5e79. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR96X1988515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9757c48166c475bcada9c456a688c8eef26f9d26a33674c717dd6d9bd739eb7f. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/FR96X1988517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bdeaa9c361c3e44a5c9bc74a25dccb8f0d5546cb713e512f72e4a48852917e. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/FR96X1988518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4ef2fb451779b4c7fe48246381c6a0ab83e801bbe8b86dbfa58083a8dd0744. 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/FR96X1988519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc46feb2336d70758f0d24a80e4689b1036797c92a87405053a9deec8c9456b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR96X1988521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd5b24b5e5af9ba934f8c6b463e290cab6a76521545d1038cf5153c7d07e5b9. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR96X1988529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6720957c8a46ab6df184ac1ee5e57376a2fbb9fda5d6ad884b0e7cfbde0f49. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR96X1988537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67314fe104bd4c2697803c9c4e76219ea33eecd1a794c2a2703be8f75edece17. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRX201841866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0246a17faa20977eda06aacbd2fb3907ce5a3b0b79753f5cbcbe2d5114688ea7. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/FRX201841870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaae1f61ff8ea9d4be34177f7a9fa1ad33db0017f28d223373b7a2e4bb2dd27. 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/FRX201841876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0cc8e116dc40846ce5ecd368b2e7b65d3e2e240aade0f02ab91db848736efd. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/AEA2Z2447293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831f08797650fe736b1aaffa61bc14f89665967462a8dab9d0f71f2abae58fb1. 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/FRX201841054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3fbbb64a7c58e0713a9eed4de2da5cebdf8bd78553d7ce31624f8895d11cf3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/RUA012200023.