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 0x35c73e661c8a7e88857e0717da2ff82c504b516ceb12c725ec6f1ee001865f4e. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e2c3e00-c6da-4a9a-be56-482005d5c02f.json and https://artists.proofprofile.net/proofs/artist/3e2c3e00-c6da-4a9a-be56-482005d5c02f.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 0x2f38982e6f037afb4b867a9f6dc207faee0cf8a4cc530ab35a6144a6c089f233. 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/FIMTA1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c67aaaf9f73ed126cc8197055f1f78a2cc3e443a1db526f2a38c960c42650f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/FIMTA1100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926524bcbc29d50b539cf9cea1374d24e77794d15f9d9234c9d7cb9acbe07bbe. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/FIMTA1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa658e9027f737f5925166a8574c8a49d7dadbacf50d49f129cda08586cff4bd. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/FIMTA1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e308c75fa5b24a545bd67aa399e0e76039609c04cf76a7546f22522ea689d6. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/FIMTA1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091236528edef4cf09d2083b61b6b9d3c95dce39b60bf60fb6fd06070427da7e. 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/FIWMA1400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b341582d417c70e587cfd8dd79bd4e107386ccf6692a013634fb02e4f0a82e. 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/FIWMA1400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa5ccc8e5a8d65cb42ae17b8a2bb31f7558bf454202e21d4fd52a7adb7d45e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FIGRF1800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64674ac5495dd318757c1601a44df3f17aa4ec81a088de6f43b84bfb4afa989f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FIGRF1800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa967e3bafc7fb28433e118c5aee99d86fc1dd28cf6b7f975be3aa4918e398511. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIGRF1800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c2acc1e75385edd30da78706c6d501d33c3be91efad9e6601cc7a5879dfcc4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FIGRF1800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333967fe0268b4cc68b38184deef00675f9bb3e7931b73eeb09204bfc95f6128. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FIGRF1800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90ad972216ce60a47e4a65e5e1de86e74758451a01a8ec6d0f876bca7d22477. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIGRF1800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6d3676c81493ca05ae06d0d5c9647e8682c24225d8fbe9398d44fa18efdb92. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIGRF1800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56926fa57439ca2d320e09f3d6d01cff7f3eaf1e70868ec30775f2dc0245c8a0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIGRF1700038.