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 0x25a7c49e1f6cbf21bf67e2b28d15053d089e65a53a9ea1ce460e8b91a6e17d0b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/441a7474-91ff-4f51-bc74-200368e800d0.json and https://artists.proofprofile.net/proofs/artist/441a7474-91ff-4f51-bc74-200368e800d0.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 0x678757d136ae31fec772c5cf426d0e62dbc240560b66224bb3e6152165ba6e81. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAGD2212173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339157163122d41962dddbabe36f659c8d45be760104fb32b2ce7e067a97e349. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAGE2245947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad77d180a325f194313d0dd78d7cc7da6c8b9c4b800eae2bd7285c80b0ddbe7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGN2252964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977cb715c374b7ffa6360da19ba928717ce571c47a01a646f6f3c88c3af5dc3b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAGN2267857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ffd92808a7edce36e5d283343f0ec9d704ffa619a33d4a571cf4e4a0163ee6. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:12Z), 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/TCAGN2267765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f91e37e4109d54b3f57c9e203a47448975b315b2b1ea3c30134f506a546c125. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGN2283079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36cbdbc8cd83a691bca3492e8bf0432bab352e5b9a612929b805354f1194f5c. 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/TCAHP2346724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f7c0a5bdb8eee20f8275c945d4f4362a29ecaea647fe2dc8ec87f8b5714563. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAIJ2457853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdb8c7273b065e75667fee4e87d75101b1fc57185087e3935d3eb37024af9dd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:41:57Z), 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/TCAIQ2443691.
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