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 0xbecf837b1d1ca61da17a283242e0c013f5100b82439a8d75062963213af0cf86. 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/e169d7b0-d0df-40ad-b2f7-cceee8133a22.json and https://artists.proofprofile.net/proofs/artist/e169d7b0-d0df-40ad-b2f7-cceee8133a22.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 0xb24f1c1ac1a4f08f7a189193649ca23b933a372ce6197884f57b0da49f650f19. 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/USDXS2008537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc12e970da777ba9d81989e6548b08c5e4ca0723e684d858fd85d7f90fbb797a. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZNJV2188485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719913f747f9cf3fafb30e6cde6ebc22568dc2082afb47f09964893adefe066a. 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/QZNJV2188405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90094ccbc01698bfc2c7478a05266b20380df0cf054b245e1db8ab6af070ffed. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZNJY2163547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744a866f93e35d6caff98d7743ad864e885515359d8a27270cc96b82fdbb6054. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US7VG2340791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ae8a00420169722a5aa3e6102638773efd339e71e738e14ba81d559b0a78ea. 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/QZW9L2394920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55031fcdf0fdbb2722c4f0d4d6a0423ee6f6a894a88c433dd3ffaf8eeeb318da. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/US7VG2422716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee699e26e3ebccb8dd71b2220fbe66f8f134bf77193477c418dc2b67088bb665. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US7VG2425677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959c03658a1d6e405d14f466f066e77a4d0ced3d76f90aad18c5f1ae4c380d7b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZGLS2424343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f85f9e48acd67e2292abee58c8ffbef610070b4ca2e8e601b53b2e33571718e. 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/QZGLS2419345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f18e11d56224085b4c16425e318bf46073ec2d0cb836ee8cde401bcb8dcb9d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZGLS2424308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf863d18ccb1e0398797397c5f305fd356be3534d3d9726cbe9b9254097f2a871. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZNJX2473303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b172f6b9861dfaaafd054af02850c55193cbec82b134611eb1eefadb295098. 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/FR59R2543584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe145bdb234c934b5593647eba818991816b00959b73d439c8d35ee39484fba4c. 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/FR59R2543585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946dc34f079965ef1168549672784d2eb7df55709a73e4959c97282998c58a56. 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/FR59R2543586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06385b34b5b3da8ff49c03a37ece41d6419facca46be7121d9ffd48d8c22f702. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR59R2543587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f63795ad4504be18878f9990f8a5cdd2340b0f8c3c1790cec89a1dd626d9eb9. 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/FR59R2543588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2a5a238221cf919324a2545b90b0ee9c26b363cd683bc247fc8aa792e921b6. 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/FR59R2543589.