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 0x1bb7470bc399651499934391547a19e9aa3e3d4f1825760e493e28d34c59f590. 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/1119e8b9-569d-4193-8cdf-8f28b966dc08.json and https://artists.proofprofile.net/proofs/artist/1119e8b9-569d-4193-8cdf-8f28b966dc08.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 0xa9f3c566a8c249dcbba1201208dd10a7a8dcd1b51c4bea67c86da0b3815f271e. 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/TWDL72306217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fc1e193bec221d91e1e46b054b471b1ea16085ed3416c15ee6c2f7a5fda182. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZZ972479515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3a398b86237b0c933c059fc343c7c672947987519afe92afb9b71a12def617. 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/QZZ972478900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2a5a7895547a40e6d2d837c0e16a29402676f1dc6956232b10b1e5ce2533eb. 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/TWDL72308297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9b39f52f44fa2106742eef0c2df549d4369315ce6171fcba29352224131055. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DGA0Q2315149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719df5d960fc7dfd6d91e0dcb4a415ab350b5e15e4e3c7482ad9ec33303fd8bb. 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/FRX872439078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e50ada1f9a55bb5035be16f249a0033eff05fd44e1dd4a8e9998ff5cff57d2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CNZ632400703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61febbcfac15230089dadd3ae3a5c6904c66d121c67dfa8d4eed1f6f4e99b14a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CNZ632400921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a24f31a055b056c95823ec03090a51db3901fa2a0df3d88917cf2984afdc427. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZJPM2480298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148f961f8c2751dd8523f32e7743040d9a7d54b15b35de62a4d311188b16fba5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/HKD012413105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4dc71a5444f9446bc59ac356b9605306229b9f5044fd7334898ede51e1a35e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:27:45Z), 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/QNSM12401177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080fb445119cfc4c1c5dd32d9b124a72764bc912c88da015c0dbbc066b83c873. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TWDL72500450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea854cfab751975a233ca8b8f1cc041a52a18b24c58b0ee8b4dd864e431be23. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/HKG732541739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd16708edf29fe951188a4581606d8673822c4c4cbc09c451b9cceea06891d57. 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/TWV812468701.