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 0x2d13b32a25f57db813b2d9e589313d9b4f8325763cae269127a5f2fc28b65c27. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aff6c2f5-7208-423c-8aee-5e2a8aade6d3.json and https://artists.proofprofile.net/proofs/artist/aff6c2f5-7208-423c-8aee-5e2a8aade6d3.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 0x601732a7a3d4277d0c0257a4e3dc6f45f63a8c7ce5133723a6c2ce66c42535d8. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZHN32599861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5f061ef9a2316895d207ad90b46e09be659aedd0617b655df6167bd99e2fdd. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZZ7S2472438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a7a28ecfe96095f2db489379c13aa9fe0f1a9c73727784bb931b8ca6b140f5. 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/QZZ782420895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a56c4f04cd9b0aa12b585f650b0b882ca324810f44526504868300da83106e. 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/QZZ7M2409920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce032feba4adcc56b2ee08e6f08639c6e99373e71fc208bc3b269d497996b181. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZTB72468388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc5d1fb2163066ead1dbcfc5e2f837aeeee27642b71c27e6d3c42583037c2ed. 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/QZTB72468402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3911fa55f457514dca382f767e819d1610a1b5de3b2b5948055fafb73e1286e3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB32494488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74147ce0cae92f5581e5565c3cb498a047048339e495feff33939054b208144. 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/QZWFR2414023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa254d8733b229b9cc46868ae44fe9bb1bdeec670af2da285ef14d7e4a99b68fa. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZWFF2455955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5f061ef9a2316895d207ad90b46e09be659aedd0617b655df6167bd99e2fdd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:20:13Z), 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/QZZ7S2472438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd064bec6ee8874968a78e385e785ed2f4e9192cabcf16d887600084c71184a35. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:27:38Z), 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/QZTB22432472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3911fa55f457514dca382f767e819d1610a1b5de3b2b5948055fafb73e1286e3. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZTB32494488.