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 0x28003e515ff724d2a389c751deef80dc6df61d286b18918bb610c5e993e07d44. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bad4278-fa39-4227-9ad7-451a305fb41a.json and https://artists.proofprofile.net/proofs/artist/6bad4278-fa39-4227-9ad7-451a305fb41a.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 0x9717996638e256fa8ce486182c985668c3877b8118b5f2d9e329ea3b3247ecc5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:41Z), 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/QZK6M2433493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4e069fb965dd20b1817cb4c4994e817887d19f22628abfb274cff4ed56af1e. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:43:30Z), 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/QZNWW2496045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286f86c4ec5af0e1662448004bab2178273098af21afe07f9d8fbe34c9049e0f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAW2443642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a441599bd5a080de14ab36afb7dccf06956ea83e43876edde3bb9e64169074. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTBF2414977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefde8d51331acd15bf7e09b191121c3bb7d0e5c21c3e45ce47c840cc102e9b9. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZWFL2499302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3eaffd53423cb427bce83f555f3363ad31e2cb86fe480bb834433cb98a9536. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ792473309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43406a6bdad30388a59c27d53cd1fe318784d34e25b6517c564b130a1462dd45. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F22486682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43406a6bdad30388a59c27d53cd1fe318784d34e25b6517c564b130a1462dd45. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3F22486682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43406a6bdad30388a59c27d53cd1fe318784d34e25b6517c564b130a1462dd45. 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/QT3F22486682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e34fe61a48e1fb5b2d685c57f5246911df2842e838dd4c622cd6d63e8dc2c38. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:31:45Z), 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/QZFYY2536534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b990dc7e93a1b293aadd24ee570ce702afd40fedb95ecd9ca6d6bebcda450e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA72536954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025234c8fd0eb3f768c3ab801fffb58967a47ae51cfc68cacc9b99b7a69d5043. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:45:17Z), 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/QZHN82523310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f63ef7bad5306cd3a3dc5bde66ac20e9b8beb2df9fdfe0556308d85f8d4fec. 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/QZHNA2589832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361ba46ea1b44943bcc5db750f66852d5107add02c16d971cca4e7a80558eeaf. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHNA2589850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91652a9ca25ec62f3fb0230d3b3e74d6c8275812cf1a094827f5827b5e633a8f. 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/QZK6J2565590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8100c46e5de54491e5766c7f295b291ac352537f401c04cc468b12d45062b792. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:53:19Z), 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/QT4K52510080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c690aa030ba1bfb48b118169a6fcc05bd0fe5ad09cffddad5d1a6f6e915f13. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:20:19Z), 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/QT4K52584300.