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 0x1c2c24f07a9603b042b0309a0047bea7a4227a5811e5e08b40df43da565abd89. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a73ab555-cc93-4d25-8485-5019e3240c42.json and https://artists.proofprofile.net/proofs/artist/a73ab555-cc93-4d25-8485-5019e3240c42.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 0x7a95139b0f46c3d61fbe18dfb521f88577ac9076edfc816080f4c9e8987be26b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZZ7X2409616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a72ce6bc0ebe4524c9f1fea76ab6be65df88426fe0b222967ccaa87c8ae20e. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QT3F32438662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e14cd8d51f70c5d314637b3120a7c091f2c33ddd07a62faa8a74c34acce4e1f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QT3F32438663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95909394592084786d8795017ddee7b817cb38d77191174640feb11ab7ba2fbd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ62597877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa09781289dd5d34a344803551fd62fdfb949c6a5154ce2f7e0f372f9f96fc5f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZDA82512184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05b4558d672ad27350c233afd0e98720d46e2a07653f2ee82d66f0d06418eff. 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/QZHN82512437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5694a22af60d9effd64c9dcdc583f2ae81e5933a6936e2d2f9fc662bd911e986. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZK6K2593131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a1a4f6d6aaf8d64955802e461be4328ea180c070e0c31e99a9b7f2bed9677a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZRP42504880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c1ef04a2e987fb2e34d8ea3758863dbb5d4cf7f0ca360a5092192b14e96493. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTAZ2567591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33c17dfcaa29339c99252c6d52221c89d00eb9a99d5dbb3198ecd0b59d74514. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:57:46Z), 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/QZTB72595860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90508019083dae4b5b8b99115e2a3653988ba048270fcd8aa303c6cae3feadd5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTBD2578000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcc4c0c6e5672f30cc2f2fefd0c5ca983a173c038f8c8a85a2741203627e523. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFR2559949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ebfc806fa9971c19b8c120527a528de2f1464b59489afbd263059933afbfac. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:46:41Z), 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/QZZ762503457.