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 0xa5751eec6f72a4845ccd933b74b1e8edeef419b1f8aa572f6188d28f3e74b673. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0878b3d-b401-49fc-9331-5c05f25cdcaf.json and https://artists.proofprofile.net/proofs/artist/a0878b3d-b401-49fc-9331-5c05f25cdcaf.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 0x234eb16218eed3fa6556b4021ee900f7bed8fa7a926c483e190501541493e440. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5062308001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356dfe05ae17f0c972cb8f0d9c426714a0a129c01b628ced9431d06b20c3da3b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5062413001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7eca9dbe955aa19cd7e557846cf8d6c54e0b3f99051b9b69f0bce4efd6b436. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5062406201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d74ee2fc270cd1e8998172b9932c23550768816972fde7a9094d3f86009ad3b. 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/ES5062404401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecf3e6fcad44ce3694ee97fb889436e36d176264c8f975dcfb91ed3434b080f. 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/ES5062410301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b4390bc781bf42df7544632121565c6a02fadd67be98ed1528d4908a4795f9. 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/ES5062413005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf596114126cdbf1f5dbe1e812a27aa523ccc4dd80eb5d248cf245f2b1b183f36. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5062411001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd993cda77ad23bd777a1e71f6d8eda030621d5a9652b53a5247ddf3d914db406. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES5062413002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fe6ccb6359c66e8b5397cc2c165345841daef4545a4d0152130b6df9542a1e. 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/ES5062407801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b0928bafbf9c5e0c2c5cd74af6416838b1896910ec90edd72bcd6caa29ea59. 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/ES5062413007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fe5d361ce99b76e45dc7d0cbebeec5f1ecc2617a9802dbaddcc3747e8c8e53. 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/ES09C1700184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ff96d1e89f97345189f6b8ac660d16efe83a19f406621e322a40bf9f44195d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES09C1700193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f9adb771bc5d07a7a95c1c509e0f2da3485bc4dd5821875db1d5e0409f4f23. 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/ES26E2316211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb5c554a27b7acf3309d6829085d69e6841ebb50caaf4dba00ecfa9c9e91b35. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES26E2316215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e242f57801aaf70a246e312dcf01abec19ff579dc787a61e3b9241d33af036. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:31:37Z), 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/ES5062413004.
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 0x527d2aeeebd0fff53d64949e97be442272a48624aaaa19531f2ba949563f0ade. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5062413006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8f7ab3116caccc1e342b6a1d420f3960ea0da2f1c999b63d79ac57e68c061e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMBZ92001621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdd918cff974231572b32070255aef87ef2a65e670c5010e79f4646c5001efa. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ES5062204501.