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 0xdb9cf7b45a6cb9e0ae84b4efe16a83ea5a96cd0f9a29b43296935b1d13aba48a. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62503025-818d-4cac-9d2c-b927c099dc94.json and https://artists.proofprofile.net/proofs/artist/62503025-818d-4cac-9d2c-b927c099dc94.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 0x53e2e7474195518a827a9c20b341f653d2d3b6096163994119b6d406b75e9712. 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/HKC992427802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d90a00a61950fde9225ff2631392bf25f6b172d4ca5f87b26044c6070f838e5. 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/HKC992427803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1822347b8eb604d2d6b19bf21213a94d7708c0dd15b2dc883a21b2a152469276. 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/HKC992427804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85657f80dde0a4d1d78b9360ad2c95bcfb92b1dd4b593e12127d162caec9229b. 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/HKC992427805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e94cbc14e6d1c92f0bd4bed05b7341caeb92e673cff4168bd59c3f1f53c6d6. 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/HKC992427806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43da59d3bb3179931c5ebdc73b6430e3ed3d233d45e84872df126388cc4eab14. 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/HKC992427807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3795f1bcbd3c620546b693f4be934fe0fb1453f3c8365d8dfc8cfef16cb61c. 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/HKC992427808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788720993b23102767090e20fcf5f87e391d650854d5c4cdb62199d714fd5ee4. 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/HKC992427809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947dbcb6a9897d98c2984d4acaa3b0e12d9cf685ab2e64fb4af9fe32d2d778a3. 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/HKC992427810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafdd7bad25f6a7f812103e0c3f8fd0e479eb4702beb75d0b9e3420972b268d4. 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/HKC992427811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c693bec86a8d63fd48abfc2a48d11d8f54fab63b0ac6f670790af77bf361e66. 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/HKC992427812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddd2b3563eb48d0995a6439cbe47edd9bc8b2beb718e0dce82a05e43a53c8d3. 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/HKA412400378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddeb20358cd608c767b2cf7fb2831481905ad44e28abe9e6833e520b3f302c0. 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/HKA412400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed04153ea4436527872482072c39fb5bb5dc83133f36341f7405062456b3dab0. 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/HKA412400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a27cae0ccc40fc05b7a6f246ae46ba081583f88baf7b4b123bec0fbe69347e3. 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/HKA412300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24d2f933125a77454b500f6ba99d0427e8c480810057c814ec2969f43d710f9. 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/HKA412400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb25482b570905614778bbdde8a3366b70e669e64f87036cbd38bcbbb32c1a7. 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/HKA412400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9f67ea128b8030efa4e2d7ad367c4595b0ca26d2cd5ce9dc339d6861d0af5f. 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/HKA412400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1771768e29b07b15112cfbbb87ac80de0ee45dcddc551557a02b770575b97fbd. 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/HKA412400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa6da1328368ac0d5b17befa24b7c9cd99d713978e33d8a143c4d93ab17347b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKA412400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c93f2ada0cbfd487144fc3c4a6e8a5c79c66b3da786e69f7b299232d95624c. 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/HKG482310789.