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 0x923ba8171754a29fcb1b62c6d4bc67dcfdbb4104272424bc1dc7142c9929326f. 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/e688b9f6-ae85-4c40-8237-d69c0889ca2a.json and https://artists.proofprofile.net/proofs/artist/e688b9f6-ae85-4c40-8237-d69c0889ca2a.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 0xfd97f8a253b14b6a1c5b8ebc9a1f85b4c7291ee2e091f27fca2d80c19154dbf6. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/SE5841900702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda58854333475d768278b9b27cbbba54637da4923a7f602ab00c45ad8d2d579a. 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/SE5842000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189bb2a83b7da02e84d9095ec96ac1ae796b6da1751a802c80b73bcfcdf28b0f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SE5842000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175ae2963e2e70fbfdabfb92ced77685b5507ad2fb97e5a27a8f2d8cd62042a1. 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/SE5842000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895f3740c007b9597110c4bf190290ae5ba0a8325d94d19b7b82241b6859d95b. 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/SE5842000901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a12e5fad92161b80bb722924ea3f6c08a4a76126469e98dbf0a169478022c4. 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/SE5842200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f4925f31fbf319f05530c8559222e0596ce0d68b83d9248c378a5790a1624a. 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/SE5842201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148f49cb8d4775e938e080da351deef168766ae1ebf7bc7cdce7b0b3e8229c4d. 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/SE5842300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd59cb4eb5eb28ccbe4ebdeae0668ccec24928cf280ecf8a712a8045bc679284. 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/SE5842300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298b9c4e28e3ca31b228e93b12062ea298b930fefad62cd63e7cd8ce99dae0c3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/SE5842300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2601d8867203b749443d7c057fed66ed01ae8d29d65c17ca0abb4ef169a18c2b. 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/SE5842300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135f5b4ce7e845aae82a394d0c6d41af4d55dce8727de782c74eaf8b1c706701. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE5842300801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6af56feb7b6be6372981c2bce2c730ee27b5f849ca75c058911157b06a199f. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/SE5842300901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2931df336f9d8586f937c00f9ffe1719c7224dfe0434a164184540f55f6dc3d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/SE5842400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb75790fd90becdab10eebdeec80d55240e031bc692025c1482f965488d6b28. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/SE5842400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd8b9d07ce742841eaf1fdb27e64168f9357e4607363f62901f3a05355416c3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/SE5842400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97431e1c7f2fa09556659a8c78ecce9d14fb3eea30f5c87a46557cd03ee72aed. 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/SE5842400701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ae84addb6b816815da32262a559701f5fae82cffe80cfe83954f2335c9c050. 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/SE5842400702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dcded5aa3b57b22dda468fbd8dc9193261b96aabee4ff6e386c64d45b56999. 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/SE5842400703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8721ae3690579d5a6d8a5eb931d95dcc20ad8497490e51472ff509c2d50842d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SE5842400704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49b82e215187408d507bcef957605262c41b8e0fa61e957cc30b049006b3565. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5842400801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc72d9d8eea1bdc1193b0e3152cfd43a8ec0ab50e95c97c26f1ca04a6cf6c4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/SE5842400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40b778b051bb795b17c9b1e23676d21169a6c5a5c9d91240b586af845c67574. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/SE5842401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac11bddb6304c73344f64f61bf02b584e417c302cf5e7dc7e81e6856a406ee5c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE5842500701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3c0c960d8dd65c3d013101e100c1e96483f222ffb19d9015b6471e6fd19c0a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE3AA2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cffc2f540031f8ac31f75a681354674d12b8030c812be91e10ff71f838eba8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59759bfe85aaa725e325b22fe0cf4c74e178967b3cb1d02046dfa14d1129a8d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2401157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9e6845e8cf243df2d1f090ac368e836bd83381735e109393260c2d98232a89. 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/GX8KD2384630.