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 0x431dcf2edbf1f352a4773471c8e93f9f264490315d5e448e0c0d8c734f0e6263. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79900245-6abf-4223-96da-8d159b245e0a.json and https://artists.proofprofile.net/proofs/artist/79900245-6abf-4223-96da-8d159b245e0a.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 0x915974519e6a109a35e042eda3d2b02d9a51a320b44527abc4cfb3ec92a574ac. 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/NO21A1701026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bf6a8e58d821a34fdca197a50d0cf6d499a2fb28111e2114f8faf641794a5a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM6N22432856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6504bd0c9c402214ca157ba947b3623e4424f8c5aefc4994a528b6c3a6dd057. 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/NOUM71700122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc7e67b5a103d7b2ca7432b0d540c15a8de4c8a4b16456d2d811874d9f3c5fe. 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/TCACY1756633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d5ed53a21eb24eb26aa8ddda54e62c567cfe1529ed9de5447f4c3af2a1b161. 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/TCACY1756698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df1f3136da36ee4360998345a66e98a83ef5fa10c4e11f2d00562716dfccd51. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCABY1448932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0281f8d8aaa0ab749e20b4941830674489636066e242d980038bcf3506f2158. 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/QM7282470731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bf6a8e58d821a34fdca197a50d0cf6d499a2fb28111e2114f8faf641794a5a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6N22432856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7a2e905f774933c7d723d2eaa750a3bd3635e91f9ccf5919c3e12ed48dfb01. 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/QMBZ92420058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0281f8d8aaa0ab749e20b4941830674489636066e242d980038bcf3506f2158. 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/QM7282470731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a9cc0c89ff141b24081bc0cd50c67e73160293369ce86a4e01419e357316a2. 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/QZK6G2305084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06070d4bc38f2f39555a8731a02e769a811bd51c97df47f9bc9328287abf34b6. 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/QZMEN2493172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3066e9cb4ba5ede2450329de9d197dad27ae94a5d6c8790ef1849ea4110c54e9. 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/QZMEN2493173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d360723813584b4d4d94639ffb9d85adfe2bbc6f9b1e6333c4dddf52eb708f6. 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/QZMEN2493175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c464ffc56af40f69fa3de52af5ac45f3940191192fceabf030c51a903cbe68. 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/QZK6F2423646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31c532c0ecbb834959c83d79cca8f2c4d9c10313ef3c387fbb2e70f44bbc765. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZMEN2493179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c464ffc56af40f69fa3de52af5ac45f3940191192fceabf030c51a903cbe68. 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/QZK6F2423646.