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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606725a6a806fb0ae2d41cd5c6c475549d18ad9bba004b50059f78791c581f3c. 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/1a4c7c4b-2b9f-42e6-9d99-d8e1092acb90.json and https://artists.proofprofile.net/proofs/artist/1a4c7c4b-2b9f-42e6-9d99-d8e1092acb90.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5e3a5e4602253d5f44178d51d9abdac85bb650488f3efdeb189079fcab4d3a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:08:58Z), 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/USSNN0910102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a376c4f4443fde32934715f9b4fec81a7c2931b0732a67c3ca9aff0eff9a97. 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/USSNN0910104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f3d7f0d4004c13115f30578662a704ecce6e4044a7ba1a87e372d6ba74c4c4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USSNN0910105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8795fb73c4e002d90055171a93b1c11246d41957f4dd78de9f475ea3197031ad. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USSNN0910106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0240f77aec30e536713bdc57204111d14820fbee36c9affee0ab52ec415b03b. 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/USSNN0910108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf5bf9b55e43c888ef10935940784625cebab4a81c39f1178b50e675439dc61. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USSNN0910109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a5ab558035294a2105fdfac43b44189ba407966c0dee36d273f6e174e75417. 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/USSNN0910110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74c302047b39dfba2eaa371832e3c5919bb71e819034aa658a7c2a3520157d2. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NLUL62000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e88ada6a09abc2afc5e711e064f160cbde4ca44973809c4117767771f98bc6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLUL62000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbe553dcbae1837fca676d678922c8caea2801196c395549a4da3f8a9d0a61d. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/NLUL62000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3ce4403afefe2bab8f4d16d7d4aeb4f621dd5dde77955d8b4e6a84a494d69c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLUL62000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2efdd54e8d3820f0cb675fb526609801703d5b450a54de690e74a8d074e52b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NLUL62000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed1e0787cdb68cd84e87f7129b1a27dc6c66ba65124121215f0991a62bd2cd2. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:11:15Z), 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/NLUL62000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce91ab720f35629d814e53a4c19f3aa119f134372ab7b4505f2f62bdccec2c5. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/NLUL62000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa4fd1a8b1e47283196ec2782eff74b7ce39e22e03cbf0539b1ae7e76f73530. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA2P0823647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d396b3110571197ba394d0fafd0716dc9286d2c47d20f1476cf1a542e679071. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P0823649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ca7c418d2c06cbe3d73c8013849ad88e92d0047020d8e1cd577e5a55107706. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR59R1711855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678a62dae3c9a4d6ea623c820d85806b38345be0ccc96cccf04d3e19b636ffcf. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/FR59R1711856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee3645006d4afdc1ccf64b8c1f998617655b50314e59c406ebcc9507acbf097. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:00Z), 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/FR59R1711857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebea909aec7158fac4f7d12a1acf900c632355535280c2a2331afff3328929fe. 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/FR59R1711858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e69bfabebc2e31cd4254ac25674486a552fae14f3bc79e4d0cca1d21dd213f8. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:26:22Z), 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/FR59R1711862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49f352298ca243ab99357c9a13b7c22c862acfff75b53b07464234ade23fd50. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:07:15Z), 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/FR59R1711864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91755a83373112ce1015035bd67d969856c8ab58e212fbd0feb32bbad61b0566. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/GB5KW1901701.