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 0xc5682a7bff43a9b80df90fe710dc24b3fbf37ac8e3c9fdba8e0ba1454d86a461. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69ebbbef-c84f-4176-9d2d-4ca8cdbba25a.json and https://artists.proofprofile.net/proofs/artist/69ebbbef-c84f-4176-9d2d-4ca8cdbba25a.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 0xaccb6b5ce889253447becf7f1842cc879e2aabb1823519ddccddb1cd114f9eea. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEZC62573527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e802745f9373cc0e981e911636dbe5ec88c85db331927ca2e3ff7417a54157. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEZC62582999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec3bee7d172b13c2b12dee9496f16212146a02b300a90d265b1e194994a4bd8. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/DEZC62584257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a6c2aadcc9951fe211353ef1c27f155155acb9a11393e4cb2a77f39aa72769. 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/DEZC62584258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b297bac2e7e4187ab21eb5494885e43bb23fac9f3d218c8b62160274358752. 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/DEZC62584259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccc32eab7c3a3b633e77ef9e4b255f98a6ba4d64e39d9c7b96798bae9707768. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEZC62584260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31988421b85408d75a81176994a00fe1e1a7df9103ad4c38fe0649941b5c45a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEZC62584261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b875f2faf092a522867ef5ef02140a4e4d70ca547fac22275d791f817a9343. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZC62584263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68a2704786d8ceffb4a9c971f3da33618108680aa857fa40aa011126c0db1ea. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:28:41Z), 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/DEZC62584264.