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 0xd340e9dd4050c2ddeabf525b54440963742dc8357136d880d6156dc2362324ad. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11887465-b65e-445b-ad97-a82d8a81e86b.json and https://artists.proofprofile.net/proofs/artist/11887465-b65e-445b-ad97-a82d8a81e86b.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 0x13fd6855df3fc15e3ad9afde00f38eac3a5623e817377fbf3348e3d138f95f8a. 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/QMEZE1814942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d38a422c047402c91874ed27a07479f3dd02fb8c4a0c2d1d07b9407324c05f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBLFP1887130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8117852c4e9cc70426e7e2169c4c8cc095e4b19db376448f198b275957998f. 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/GBMA21827738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7510fb06b025003a863b40f3c68b5a4da3be39e0a5098312249104cebc462f0. 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/QZHNC1917741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc05cd9bbd20f4f94560d54d5bd6f20a7ab64bd95248ef0ef5c9e9d35c547494. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:26:46Z), 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/QZAKB2012404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f9e2b66bd9838e09b996ad7116ebbf66c14be34ebcdc692e22692bfb6c4e63. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZA41S2102332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4153759255d80c3d93e522bcaed723b0c184d4ad9926ce818294c3f4bd2ee9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:34Z), 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/AUGBT2344353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a042c724933a4546a55ad42aa3d2f30656c46f5c670ca51132eccf2abae78c9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:44:18Z), 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/AUGBT2459391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b4e1815d03d6aceed5775ee7b73b22890c16543ffd0d18542583f92e28012d. 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/FR2X42089568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8d2461f1ce7ba62c508a9adaffccc45bd4a8bc85ea4e98ef5cd9200a9c9954. 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/QMGR32040021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dd1806406b91fc8a336be83d24b78b77bac78787b1b760da44560fbf240aea. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/ZAA6R1900215.
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