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 0x9cd6c78ee4bb5195bb5ed53b27995371be4e15a3f10618b60477bc7a34bfea7d. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6df620e-b2a8-4621-9f34-3144fbc3feb8.json and https://artists.proofprofile.net/proofs/artist/c6df620e-b2a8-4621-9f34-3144fbc3feb8.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 0x311970f6325bd819c87e7cff63b30b76d5a1048e0b6d364dc7240cc741989fb9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CACWV2552507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fb602a626d4705e38fd17128bcee5abf17b70345ff3a8dfad79bd46ca6fc91. 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/CAGOO2519671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61080e4cdd690049332d5377f44b772a07bc80e5b7300d89d1124d17a5d980f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAGOO2519678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3199fe096a919a4820fbe371a73cead3fd2c9ba0c6a4c766c46bb8966ad77a64. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CAGOO2519679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ea88af7ca854c192db907b8c139a0671449403f2cb5a0e53a963c9b29ba3ee. 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/CAGOO2519675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0062f2eab7dc577a0883d658b10b97d843bf5fa5a8d19f27d3a76ffcf9ce0f. 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/CAGOO2519672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23378eab32fdb2e932830d3f3f5186d124985519b3f33747079c2f46104512e4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CAGOO2519676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe561b69d038d4480edcc2f34c97e7932090f669a995df0cb86aac5862fea73ee. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CAGOO2519673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39c210342904cb4d3e7146afe21af7d12470fdc71fcfe571de48711e10e2ccf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAGOO2519680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68cec010e7048ecce41419afaf044f7073c9968a14fa833e4e8679d385bafe6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CAGOO2519674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023449aa86ee624b75ec34feac84f1371bbb96e0c8896f209f67a3fd00310252. 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/CAGOO2519677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002049020220ea6a9388a664fa4160d009211dc7c47bb62f56fbefb6459ce0a0. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/CAGOO2519681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9ca3e62fd4b02a4d41f81c5acdd8190a47eb299fc4d3c3eb2d8adbfea1964a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAGOO2519682.