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 0xf31463be95f03dcbe8d11c9ee6948a775dfb70255b0e5b56db668d9f3e08d43f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d1d9bf1-83bf-4b56-9adb-850f8df206c1.json and https://artists.proofprofile.net/proofs/artist/8d1d9bf1-83bf-4b56-9adb-850f8df206c1.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 0x75d29761a57622ab7b36a6c0e9e747c260e3d090eaf5788623d8c6304b1a2dc4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:56:37Z), 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/GBKQU2413357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02add0b289704be9b8ffe569c51b79a065c593d812c570040f53a411e9e28eaf. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZES82433149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea9eceb4707431baf94caf983a39b7488e1aa085365a5c5e37b86a18ca6f355. 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/QZHN82462569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9691bb7e8f510a78e8b92eda744572175b9c78deaba8779066255887a0178f9d. 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/QZK6H2425168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc639c8593a71752159e3df05c2c30dc9ba5d25f370d13f050dbe8014583ba862. 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/QZK6H2427130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b42bbf84636dbe826772b0977abb4e6c961429748a305d956411b42f28c313. 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/QZTB52424318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0944f6704a359439eecdfcd00c7c9897b140d83553b3bfa564d1f1182691774. 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/QZWFU2440957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55292c56bfcf578554075479381ecec1f459fb42c294aef674f07aa38578f2e2. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHNA2521043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a7389c296fe4ba3fd8fb02a044719d3ea100df994af46957fabb86dde59591. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6K2594191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a773de0f7ea5a9a982a97f95053838c7b11c785744aeb89402262735c83134. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTBF2595906.