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 0x2c4397d65ac68044047e6706932a5ecac1629654c8d7fb0c3ff9d265bc271f0b. 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/6bcf4208-3595-4f16-8fe5-064e4617596b.json and https://artists.proofprofile.net/proofs/artist/6bcf4208-3595-4f16-8fe5-064e4617596b.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 0x52fd33c565680e4824bb8957aeb3df4826e0032f81cc911f2229c88f5394a4d6. 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/CAORN2215007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89402e71b858c368eb5b5143157458d97805cd76ea0da8b73747f6bf2a004ace. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/CAORN2415017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f027d79cb21b660ace6ee8bc8ad9e8f46ccfd954e58bec88a84eba0b7740339. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:51:01Z), 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/CAORN2415503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20825e30cc55d7ae71eca7f67b4d6bfa840609b77e183d7caed06b33f43e8ea. 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/CAORN2415018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeb345469b5ff5f4927300029f093e09336a61990b1cab047211652a8ae00b9. 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/CAORN2415020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bd043bbfadd3d454434b9223559caf82c411d18e8f31ca7a7dce6c87440026. 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/CAORN2415019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486f0ea261e58c8189db60ad6c5c6a9ff750fe6d925cb4c54b84a880641b9731. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QT3AJ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f88ab7f5763fd52f0e263fde529f8468495f886a845cac486ef94bef23d99b. 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/CAORN2415022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf079ef28d7b5010c67e3917bea9eb1bc185b614f169f0de0cd831297dc14a752. 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/QZZ7P2400680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63502e04c57f5b1028cde1ace61b94a0ef373a71a2b0c7b29f775012331d32ff. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USA2P2475782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf28b6fe45593ffe37150de077f5d3f0287295269763d1732d0aef0f91f94ce. 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/CAORN2515000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5faa8c650a5e6e6b1f691d235c1ae17c359a693d2553f60721dd7297b9ade70. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTB72580840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebca1ee2c6b054d1e8d1c4c5e2e5137a93453da8803880e5c2e85c3a93f33a4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFR2516621.