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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5483b92fc3f3c7f902b5dee286c020aa3d4d04ba13ece6f2e7d6688b7eae89f7. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b38f41b8-56b4-443e-be80-f8cb7dad87af.json and https://artists.proofprofile.net/proofs/artist/b38f41b8-56b4-443e-be80-f8cb7dad87af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Now - Tube & Berger, Modul Kollektiv Remix
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d2844ee65de40355c56ad2d62cbda18db8aee704e1a71d46889b682d26c733. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEW872204007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7862d888d4e8ab0ebe53231f657198a36965da697c3d0ce1682d5e2c69a4681e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEW872301798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539ab26975953edcf77ca74834473cfd5f250be4c4ae96ea70bbfc03935c96b0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEW872301802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7387eb9dfe8fc16a664872ed8bfcdd78878fd76fc61576ae4252345d913147. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEW872301176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05fb585c97b5e4bcd5f3ca7783905c3fc3d4e06c55e5de54502c7cdbe0b6f76. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEW872301178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb7f39de190bb11d28543c976fcdc482a63b72715b646eed0126664c0349c03. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEW872301174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac7607fbd256ce2b26e6d599b8a8a2034c745236d2120bc898847a22164bad1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEW872301173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadb749a671bc79ea89697b9d712699fa32bb10fb1ad64325509a52b147e070c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEW872301177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d10b8edea9a16332ec99c8d4ff4479d1f48d849ed3df59c84d834673b0455a4. 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/DEW872301175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a165e43a40fe270f84807734cb29642dc86c501cd0e2015ca1c222d61908dae. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DEW872301172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce9b09fa179e988a7bc1207602ffcdd945f73b812cbda31fe8b308c2f783139. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEQ722100029.