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 0x22aba178375649ed8841729bddb3cd831130ad9eb694ccd81a8b7be44fb24ceb. 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/5ecd1c6a-8b49-4c36-993c-5cdc9db3eb18.json and https://artists.proofprofile.net/proofs/artist/5ecd1c6a-8b49-4c36-993c-5cdc9db3eb18.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 0xa4d5d521fb96efcb2828c89050056861a6541f1de66e6ae7a483a68617756627. 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/INV440500182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1694ea85e99225544728c907399de5975b5a6dc15a5ab34a11dadc05aab48f33. 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/INV440500193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c223a2e18817ad03f3aad80d472f4e0d8613364e40bb98dae741ea35e03562. 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/INV440500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b17f378fa0353350ab20490cbbc77859146064d6173a22b804b8d4a8f5b906. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/INH100513866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a818487dbd22bc76e738f3e590dce8eef5bf2ea3c2be2bb1ee8831a61b5bec. 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/INV440500185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c571d601a513d81f7b175c62af9d0788fe697dbc7e2d98cc504938d2e5edc2. 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/INV440500187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdbc568c6b72bb28ea27d7fd1befc685e7ebfdd40b4b3115203660e8d868a4f. 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/INV440500188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a4fcdb73c2e1056ed1e96f1d1b6ac19298e81cdeae26d12f632d683e5c6c3b. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/INV440500189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2f90ffb9d4d7849e91eeb3100ccb0e9a60e63dbc353c390a2366017ca57828. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/INV440500192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14eb8ce0ae8f19c598a84ee6ca7505ed6ebae9525a5b54c6f12fc5a9d30437c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/INV440800155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa0e6ea9091ae0ebae3e8d25bccfd31cb9e726901c7bdaf1abe62d2f0bd736c. 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/INV440800130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322197b8f0177598f07ac4b06affe0f7315575094a1dbdb6aef490e6c7371b38. 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/INV440900217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e24d03b15c47a438c238c2cff843e859bd5ce96a5304b83d4686d3668772b53. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/INV440900369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a514852a692780a760bf7e442025834b8324cc2a2f123b180b77df64fb2a97. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/INA5F2201721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef5dae1de8efef19a78cc28869b054d4995c7c313eb9eb48cfd404369bae5f3. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/INH412501547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a3f5d85bd6cbfe3242411d91f38ce753195c0ebe57ad57848e7515f8907c50. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR59R2450992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e826eaf855d31b767a566b47e9d5d3c591ccb5965b672f876d305caabb5418b. 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/FR96X2453994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3b83217705e916a23075a6d78d254c2bfe45a651e8d7db889f4ad3e20f703d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FR59R2432593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483168177b83f2eed39373fc6953edc9950762324543821536681f0b5ad89db2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/DGA072424713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0655fc04473de43b34351d1184d7d9026d7740a13e6f56bc0c92c76a460069d9. 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/DGA072487225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ab2e534194ea52215c643a8c635867ef0a0e83005a33fbeec2d8c264fa66bd. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DGA082476260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d7f711ca7984b33fc81e7b1cf23a2080912759307359de250775c2ef39d850. 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/INT982402329.