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 0x634b4ad174996990a4b9dc161c91294a05f2c01de532f96721e03e3a549f04ab. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c78c919a-94c9-4cde-a00b-437c46ca17b0.json and https://artists.proofprofile.net/proofs/artist/c78c919a-94c9-4cde-a00b-437c46ca17b0.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 0x433ccbaca5063370d7590fd6e4552c5010a5fadd4dadb166a6a9f6419738b0f6. 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/FR59R2394193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216665e17f7e9e33808230356d5fa8cfa65869ece7f93b3af9fa996ecd3ee711. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:10Z), 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/FRX872376116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e19ddd1bc7b0b8b947dfa191b8b8661897236cd882ad27bb585a9268d91f2e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA072332800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a367ae4f2eb50e22aba7128f71d5590ef04ec0c93e40403bc510abe8dd54d21. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/DGA0Q2312007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d2ce79344fec452138425038e1b5fed2844348fe9e6f336085f9b79cd65d36. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:34Z), 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/FR59R2456625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0003ab8d0593cc2ad24b2b82788617ae02d7467850bfcb6f4515c37ab0a27a9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:33Z), 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/FRX282406634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdf74d56df433b8cc348d23fc7629eff1a349d8a34aef2ff1b29ee13cccb32a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:24:12Z), 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/FRX452429398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b66cd8e9cc93e4939985562d559b98aaf797789e54ff2d00600dc0dc79e4e78. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:16:09Z), 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/DGA062457585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b2cf095c3e6eb3a6df927d1ad05b340f25146f6d68f41e99d8b47ec76657a1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DGA072491037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a5cfa45fa54a9bc2ed0e59945e7e9d1fe9d8eef617204e90a11cf988fd38b3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR10S2480625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece937f85ca2eb95c4bbbded8a1c63caf15b98e53bc9980017811e7d644ddbbd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR10S2480634.