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 0x9bba3a1bb02bbfe3903e87015927b2c0ef6ec56e4be93c4cb853bd0ced9981ca. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d0ad4cb-daf8-48e5-a71c-7e9ed680ba87.json and https://artists.proofprofile.net/proofs/artist/3d0ad4cb-daf8-48e5-a71c-7e9ed680ba87.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 0xba6db7687f73cd73ae9b877af5cfee7cd5ccd3d4b1cfb1c3562d170f42372d46. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:42:31Z), 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/QZHN32594332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252532ffcfc75dffdb0c2190927b5b4116c2fcfe914e376c214c0c4decfe7fbd. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:50:35Z), 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/QZHN32594331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639cdafdc779a0bcc80b2eb7757bbc48f663378de6f66cb82e8ff5b26b9e25b8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:36:16Z), 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/QZHN32591783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd4c1b55eaa753cd287c4014edd0d19f36a96b1d1ffec6545b150db9ef353e4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:59:41Z), 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/QZHN32589702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9762b472d1dcb4c2d007f47c52fb338c06bd65cb34867df71c4e7c642dd7c031. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:03Z), 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/QZHN32589688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd96b6d101301526afa72e89c24b7f24937d9d18f45ecac2ce595d43a2c1e649. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN42568829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f50480136592e91ec6a26bcaf81b25ec96f7d5e55e32ef6a0ae719fd608a38. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN42568836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242dc52626463f91f60f75a609e9973bfaedd799edd7f659af16bba0d6638680. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN42568827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4836bb810ec177a68b8d202b2b6c6c501385439aa9b6c75ecc2745d84eaa82. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN42568823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee9321bb01b84d071257e3470a00dd5084cc18911703538fefce3baf5ced3c4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN42568899.