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 0x7c311d128d476299a1bdc3cbdc02a2f96bf70377af0ecd3ae9e3986de59787dd. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79927f49-6e36-49b0-9846-abc82bf492b1.json and https://artists.proofprofile.net/proofs/artist/79927f49-6e36-49b0-9846-abc82bf492b1.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 0x7f9506f355cd58aa05273d57576d3128ac2f98c1d426aa60d9b39fa19dff65ca. 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/QZWDE2486944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5a107a67ae22e37ded93ddd550378b5c7cba828c15495d88f552476eb5746a. 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/QZZEB2441468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b19a1ec5c8074dd54986ff2fe646582f6ae821abf63efe20643d3c400494d50. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USLZJ2105620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff5858889d34780cc59916819492be70a650cdd657f7552ba062fae358349ee. 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/QZ7R41952522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a10433a8a84a1e2dcb0a57b81f38c7bf4d056bc208ae30f6e6a2f3ee6e0f2d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBWUL1817924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135d6f0ef84c1a5af19ff2b249890d24764258a37ee0d6cd2b015d162cae6208. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZ7R41952523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c4736ac32f62cd6f3ce1679b35cc55a2cd9f894cc3ff8953deba3d81c9c030. 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/QZ7R41952524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1662d952b64b680530e8aad6d7f63431fd89fd2c6b87d81841c5934d2ce12195. 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/QZ7R41952530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de6ba23a20c7b1bc5c000e60f4840b6bede045681d8add7f30dac8d56cc62dc. 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/QZ7R41952528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ee4a2b62ca865a8d87cb77623b23eb73347b37b8feb285bfc4453ef9463e11. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:19:10Z), 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/QZ5FN2147335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a47a648fcbf254d98cb25a100b6fa7d36bbb2713642bdabeb69ac16a2981c97. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZHZ31938831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b2f98600a1eb352c80b4ba536c89b49b79613439c65618bbcc8b5cb7195d39. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZ7R41952525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4b2c5ddd952ba83696f1062aabc19a8753e153f0bf2f80984ec2f23c7f5356. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZ7R41952526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200aedbfc7872cfbd9f6d6882275361b89b3b30c2ec88e5a23e20d7909931c5e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZ5FN1982570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c088f5f7d8edd8b502160747d1ffcc278ab02f104fbb484496cd21b4270229. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZ7R41952527.