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 0x797d8d8d91d29d9abf768af50f56cbd877ccb3ad7f5c23798feeebcdd83a0383. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1519f48c-e3d7-4c81-a4e6-2abbde95e298.json and https://artists.proofprofile.net/proofs/artist/1519f48c-e3d7-4c81-a4e6-2abbde95e298.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 0xe8102ca5abcaef5e7df9c1f4fef5fbcc9309bcc6c50cf0d537fa70de0f7aa948. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFP2497892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de4867de2d22d58351742cde8fb081f1e5c9ec8e10605fb62e119bc60d091bc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFP2497894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9e01e385979242c5d9d413e7a089a45e3a149af542c3743bed5bf494bf5d82. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFP2497895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29c32787eda063b5215c0b0ed9a1a781c33aece47ee3bafbf3e5c6449a88d2b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ792448192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89352d8b6237dced131a0048dec4e3dddd68583fb7c392026a0af24a28732977. 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/QZZ7K2460573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f601984c6db7d22924f41051104f77d77ef83e1654ae9fbf4f0fe697f1e4b27. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3F22412673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca3e2f06a9461eafb7c7470f9a1be249271b839e9d32a32aff8dd4b2b89c038. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QT3F22412674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba10dd4370cc42f931dd36b14438d0f45f5b5ba51d44284b546db9a0b7ca5284. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QT3F22412672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97eb0268ecc85f001a104f43da43e0c80925ec1ffe92cf062c05f80173fed79. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:52Z), 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/QZDA82594379.