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 0x2dd9599df64465670489b89603627d01dfc2512a273dda5183aa4ae76f92f0b7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40174206-2b65-4e01-bc45-a2a372d80325.json and https://artists.proofprofile.net/proofs/artist/40174206-2b65-4e01-bc45-a2a372d80325.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 0x1059171272b047661b6b9d44e091cdca38f1fe301dbaf292f7b826cd01688c59. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS2168498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042f0e1e5c81d050f28c854f55a46ad8a756efd9e4bbd5de6ae5436208195568. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:29Z), 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/QZMZ92061822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ac8dd55d3ecbcf7aae4f1f89480882f3f61bdc458618c76a0e845dd3ca516d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:24Z), 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/FRX282169592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3a1cec97ae25f068255398dbe64f786191e9c3e6b490744c47a36dd40e3a9f. 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/FRX452167468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aaf218ddcc252b9c3a062d980ad8016f50aef6ef5bdb51f0d3d3391edc524e. 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/RUB422301479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b0ffd1e609edcd551a3253a4a391be36877f1ee3dac03211bc0cd85e4beca5. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:57:08Z), 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/RUB422301480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49b53cf8b1726b76408528712647b9c06e4d04b76644b9136644ddd40f41a5d. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/RUB422301481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c42784e31623105728cf713619aade3ea8f7bc578833a82ab4251bd88ffc28. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RUB422404189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6050d5e33083f0b3f81256cb79880a943556f23ae6884087aab37c7dd27e3c0. 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/RUB422203391.