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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 0x5613363095e8bfac5666c48df83f459d66d08709367f4ef842b7125d52721c50. 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/16f94519-dc93-4b6b-9e8a-192f21a0bf6e.json and https://artists.proofprofile.net/proofs/artist/16f94519-dc93-4b6b-9e8a-192f21a0bf6e.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 0x205ad377ab1caf9e66a5204039ac6fb8b6c19f4445acc9b7558e2423f95dd053. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2040581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776a66443368aa19cc9f70b596780af4718db11a851d82c616b988da763112c0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFME2331218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc68e0348a823582771d1bca57329de45f37f496e924f190ea7e0dffad9b4e9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBCFB2400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f1138677f54fbcbe23e52b1a6ea18b7171a11af52ead02fda7f0a067999e6f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBCFB2300507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb01b1245c16074b47beffde67f1e14d10cfe31b819f3b565ac85d527520eca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBCFB2300508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187765f0943a959bf27be2ce2461dc6946f124c5ec66a906659953520aac622b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBCFB2300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feeb6bc1bb47ef7e5c232bd629a0c51d34681d78a6b25d1d47ccbe356d610d4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBCFB2300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecc31ba224fbbc4a96a6b4f769d244f053760ba9ace88f192133ea72b33bef1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBUM72207201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf516910141ef42678638278f5da03f57ecb58dab3e3779960b4c34b71b31bb0d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USZXT2250222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd277bfbe2e6800356effa154fb622f58e19a1daaa32cd2ae178ce2149ad800. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USZXT2250221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d490a741244c4f8fc7acc9266f7dbe63a7aee8fbb912e9d4510ae397f08160. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAHS2200475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99be4cb2c5e8e4da3d698be1d81b396a619ad398892c65da481dc6b36df1f6ba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAHS2101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76891fb706dba08aacc34b7b44c3c86135e262b79de7c1248864b2b58ec83988. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAHS2100828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1c0a907f5f70f79dbf4a54810c937c741efc1fb2570c20d26cf5816902a4df. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBX722100180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f16a37fa772d7a8ea5fc7e5df8b586a9d9c07c888c2b918861d2109bbbd0f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBX722000602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823b065140ff5795fd71f9adf72301e8af53b3dd6b93c9cf4ce1171ef403fb3f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHN92073070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fdd8e5a80b8ee8d34ca009475931ebfaf85fda140b8bebcd7430c3a877eb8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKQNV2000043.