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 0x48046c3b1bc37629f52795882672289f81d0a687f513bd474bf8614f4bc129c8. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c70d379-3823-4671-ad42-a92d016d31c1.json and https://artists.proofprofile.net/proofs/artist/0c70d379-3823-4671-ad42-a92d016d31c1.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 0x4f12b3de23e863de302cce483530d4652ee08fabbe99142ee3fe02520d44e2c9. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/US83Z2048797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b4f3532c8f60f369bc24f8820f3c0867a7af3de1ac82c44d36c62ed1fa9070. 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/QZ5FN2129584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e29fa32e60d46085312e040002cea1a3ce023377a3106534f241ec7d608c75. 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/SEYOK2128947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d54db7cf777a5f10f92d5cbbad0b0e853053e9b05481dd90be7e52ecd315a6. 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/SEYOK2128948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00627bd46dac828971101209c444ac3a50e2afe45de65cd3317aefb8c80d484. 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/SEYOK2128949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa66c4666b4c424e8202ad525f749e6d1689f6ee9d8f3694ff99f91967dd7e0d. 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/SEYOK2128952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d07a50f11e2f22e445065e2678d75cb336ef4149512240e07a97666d49af2f2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEYOK2128955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7471d482b5f0315ec05a6160dd847394c4805b788a611d3c381b578acefd7282. 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/US83Z2144551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe720f9e53d5223ce3b92ace128df1997bcfb718a3631c921f222ad4152472aa4. 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/US83Z2144550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6412464ef98e81192f2db2c9912229fc2c303109668439df26fde1118bfd8f. 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/US83Z2149469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe84031f5b6830a4883fa4a3bb38eb1c6323b8be5fa6a39860e573740cdd6c4. 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/US83Z2203737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f87c2809811845c1985b7b01dd7c21baccdae88c36c4ea98e1f95d902b583c. 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/US83Z2235286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f87c2809811845c1985b7b01dd7c21baccdae88c36c4ea98e1f95d902b583c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US83Z2235286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2c9975584e3276a25c14dbc9a446c092482abbdca272edcf34da081ade7a9a. 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/US83Z2305238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656e6dd5abde4c8eb5ea3ca48351a8f514c0924431f13f3fed09924ecd9cf6ca. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US83Z2521179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21ee760a4c27a95584a1ff805db8b717d65f6b9364e24949582313d2f3baa2c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/US83Z2521180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3833df78de980bf6c1684c63a4612637745da84103dc920441abafd7f66bcb07. 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/US83Z2534939.