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 0x515ee0a2d80a25751dd47657af9362b4f3241694a50e80b7c142b6147a44fdb4. 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/cc617203-2c42-4f3e-bf63-1d404cf7f5f8.json and https://artists.proofprofile.net/proofs/artist/cc617203-2c42-4f3e-bf63-1d404cf7f5f8.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 0xb4831ae51bf31c8931bbe274767c549a8acb217598416be9adeb9207081c801d. 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/TCADM1878062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb175fde2aa39b78f646bfb62ffcd93218d6f17c8646eaf9ac0e4a127ee76f60e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCADO1848372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4831ae51bf31c8931bbe274767c549a8acb217598416be9adeb9207081c801d. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCADM1878062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204920e08a81dbf5507975399701d4fbb3676e7e98d6f545530cf3d6ed715cc5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM24S1837068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2a97df2fa56cc8190c4a5494943851431cda791ca964cece6300dedc9df91a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:33:11Z), 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/QM24S1837069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463d3cceff0694994f1744ded323159d70f646de4cc0ae1725aea673601a71c7. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USHM21704689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9602f34d5b47bb9c5f5015418b202ff8137cbba91c50166e723d520940ba675c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ31985256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a9124caf3f180836e68b995116eeb776e6f2f39c26ba5d2d3edfb17c833463. 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/QZHN61958387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaba13c8e6cd5edb2e46c626e86f8c33e4c5eb118ccca0f49333c225cdc6434d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWS2300511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac764160af764cdce727209202fe42cf7c0df9aa16fd6282e7f9293afe6a658c. 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/QZWFH2326593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35105c0c89cb145a68f3c1874d7ef3317e7be5053bdf279ac78650740fc6f4b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDA72497853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0b7515e0d9bf9bd4ef49832ff3f72df1b737d117a526ccfcbc8b218b2b9691. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/ROCMA2513620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab65118add3a3f62c10011915b7b4eb781626fb2176a6c963e1d7f115445493f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ4JJ1846657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a2249a0b0436aadd7180971f67c5a0dce3e2f38867fcb281f0b18b5a129a4e. 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/QZFZ42268770.