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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b098931ba29558d094d0ecdae328d824d1e301343d4582fe2f4b16c7dac9dce. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b541aa3-7d2c-45e7-a287-f9d131254fe4.json and https://artists.proofprofile.net/proofs/artist/3b541aa3-7d2c-45e7-a287-f9d131254fe4.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9bae125d21c7c1907e6e2a076ab88ee6b71bdba411a037e694be3273beca44. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTPX2209091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60369ac2632169b259cdcdcc0274ef8fa63c6259f0d6d73076a2ea2519abce8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTPX2209092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f2b38c709154f257938f2a9d534e4f9f1625f21d4e17b69f8fcbfceb13fd57. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTPX2209094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bba937767d9117c3d8e7198b81f330196a48b5d25a1efda1723435d4482b3e. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZNJZ2288221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17df0ca7ad4e1b6925ae240d772d9e6ebd2557d21a560c86663f08f9b0ed24d3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6SA2437936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fbdabc732d91dc4ed97dde6aec83f421531aee07036793bdcebc72b7ed8be2. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/SE6SA2437937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc9e8c5f3482954dec69af48bdd63460e06325db97661408bd43a9ba518040d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SE6SA2437939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8300017d340fe26f4f837c5d1b5de04d8567c9bebf5e546d418952fa53f74529. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6SA2437940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc66a7a254a2d315cf965322a00e9fd16916e7b1d99888b53684eca4a55b22e8. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/SE6SA2437941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2c190da484ba8b916617da2e2b73b77b871ecb2767a46a4051b2c08087a11b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6SA2437942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fddbc73635992ee75b35c8c84d557ee9ecb260c1f1a2d7e32d51e3e2ea014e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4Q2112930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb433695a156791d2806b84f0bc73642ef78be7240841f3318b67ee6711637f5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZALLV2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d78dc44797b68b9da0d359323fb1b90663f8825293ed7dda246bd924604d9c0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX3Q92308160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9810316cfec6adfe4a265c82171a61a5a48a3bc4b609e5a0db9fbe5b516e93. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GX3Q92308161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f7ffdd277699a72d82b40e4698c9d919fa43fc60c4c2285f4f83e6061e0941. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GX3Q92308169.