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 0xb6f06cdc7d1a473e1624322c78f0271c3b6c94ba0d648088045b8aa3f79be8e7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7c838be-c4f4-4ff1-9052-ac4a01234885.json and https://artists.proofprofile.net/proofs/artist/f7c838be-c4f4-4ff1-9052-ac4a01234885.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 0x2349bac633d9e08cffeb6d3cb651f9d51d284fca7a0aedad18b587e9e5566a1a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHZ62206073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8464148a8825b91558cd07318c6b6ca77ae69a9b547431917b1d556f4a730a90. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZHZ62255563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac60e6965c5c6416ac9824fff83939607bc52b8c87eebbd1b6d3e1880d102d97. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMZ92249466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1963555a85988116bf49a41fafbbc1219701c0a1d1ffb692a5f986fb4a5cea0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:38:13Z), 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/QZNJV2289842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20df80e8b7f03670292495cbdc9a3033ae32107cedbff6b9b481b389fbd57855. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNJV2287327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e68d33362226488108841a872359235f16ddc59adf821aca02c0a333f8a913. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNJX2230006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ca2ed73e256ec5683c7596009f20a12d8b6c35ef7559f90051d245c878245d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJX2229908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3762c89c5e81388b329b73a2e840fc725782313509aa2433b46dccf9127c80. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZNJY2266922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda710cd26ad3f53d2e7a471ae7e64d0901f2c8e22dee4e47d15331719a827f6f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJZ2286529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1df74fd293c8702be8cbb320119d414bc8c7efab4c2e5af09212eb9bb4447d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:14:24Z), 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/QZGLM2322046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce4a4fdb7a062f3352f00825d9ccd7d0c0a541f2d4b823a67d6e6b435a9864c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:30:04Z), 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/QZGLS2302005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61767042cc4a11bd267e4925c209697a1a57f771e5374b12d9c525dcd5285776. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZGLS2302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bac0b899753243fbcb3d184d9d952f2a13102a93a3e00715c90ceb2cef5197. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJV2304832.