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 0x9048242aabe49f676da48f580ee81c798033642b4c8b3cc80c15b0c3358a23f8. 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/f26b3500-2164-445f-b473-196fe6ebcc66.json and https://artists.proofprofile.net/proofs/artist/f26b3500-2164-445f-b473-196fe6ebcc66.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 0x0ff7dd92f91ada59aff7ca96e8de6bc96f4a98271b16808c99e9aa3b05de34f8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES92164357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6216ee78abf163bc4c8f064cc0398904d678ce3a2c0452031e46ba6b5b73bc6. 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/USA2P2152088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313eed9cceb075ec00154eed14fb02c42892d7dfcb07804c537c1ebc83be0c9b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBUM72300919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf076052fbb645135cbfcc388e040fcb4c9a8d6f0ca04ed3a2fb81177164fabad. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBUM72300960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b074e1f49d32e70bcb09efb776e3b94a2e727ebdff96daf0d7a6e9ae62720b5. 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/GBUM72300923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc379204b5122061bb5af2fb594f8a626426e2df6948f01666a6beac2a69317b. 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/QZTBE2314082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9791808bc9f96b8cacb846978187f92086ed07c679cb1c2ccc5046e7e702097c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:29:16Z), 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/QZTBE2314083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb884c71216fe059fefef0ef7490a5cd73da76e18337a81a6b319ce45a44db787. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T07:59:22Z), 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/QZK6P2430203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2c9131f9cb66609389c4a547b07f93d61f8c1cfc02be2acdc96a0f1370d436. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/QZZ792437703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe173bdf03eca9c2e136ca34630147069b56f1e8efc4d53b9b314315e6f99a503. 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/QZFZ42529584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63357a8c604089deb54b1f34200ba85b0f8739829096acda0cda0380d1aefae. 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/QZFZ42529586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bd0921e41b981a9af5e67827c9fb3d3b327490980a140ec7946a3a33746933. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFZ42529587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb884c71216fe059fefef0ef7490a5cd73da76e18337a81a6b319ce45a44db787. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:01:36Z), 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/QZK6P2430203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9ce603ecc771b429762e55f7440b427176c9c9114f35578979e9d3222aca06. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ42529591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63a6c3b4d83d92591febccf87f59e9a4cbd978e051ba443db95ab6ad6fa10ac. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:00:46Z), 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/QZTB42541896.