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 0xdfbb9d59e9bcbab0f9cbb0741f927dfc821b17338b4b50fd152023606c07386a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12a39221-3e49-443e-b8c8-175d4d0d9056.json and https://artists.proofprofile.net/proofs/artist/12a39221-3e49-443e-b8c8-175d4d0d9056.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 0x90c7261d562c5a70f359963a4a120c16086f67fd3287ce52864c46c6d9f9718d. 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/USDY42144250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f6186af89af41e2bbbc8da5cb92ad478e45633a41283b6cccb80cf35ab6898. 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/USCGJ2069241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7d4e831739803ebd33aad69fab4bb31121a8876b86f6d47afc3c81a5d4b146. 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/USCGH2119856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c753f0783d7704c135d98a510f2a4dcb8f920977fbac746642df066dc84cacf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGJ2161203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0097a6325d11a9bca33e214dc56cf1058079193e662e31f57e4abafcf20c4279. 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/FRX282123257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0b83ab2009f09675593dadb3a949f36b8b722e4e4225db2282821d1cdef81d. 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/FRX282123258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdf17f8c07a940fbae01cc83edea743b821109a4e78076d878ad9c16a0213f1. 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/FRX282123259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73607afc598c7b53c86e455f48c11bb7a8da791d51169058d0b16609b3e3cf4f. 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/FRX282123260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80380b70f9e3265a236cc89aca5a25649ea78320eade6219a6d8fcd8c52aeaa. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX282295527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7d4e831739803ebd33aad69fab4bb31121a8876b86f6d47afc3c81a5d4b146. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGH2119856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb15ea560009831fadf2fc7d9eee254347c8d96a157a3ed58e215683e8575fed. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR59R2147865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f6186af89af41e2bbbc8da5cb92ad478e45633a41283b6cccb80cf35ab6898. 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/USCGJ2069241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c7261d562c5a70f359963a4a120c16086f67fd3287ce52864c46c6d9f9718d. 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/USDY42144250.