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 0x4744cb10adb25c8fea3b70755ee91f3625ba84382588c57d71b94ee43289b20f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b398cd7-f16b-4cd0-8c94-86e27dd9ece3.json and https://artists.proofprofile.net/proofs/artist/3b398cd7-f16b-4cd0-8c94-86e27dd9ece3.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 0x1de28f1ec8deb43db316249c9db8d84469a4cec4b9e4580b7cb94cc9d2df9047. 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/NLS241600592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000cd497dc0ef8b8884d07e18b6732af326a80727c61ff9373075d57d18160ca. 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/NLS761000508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b470adfb42c25bfba22fce110784273374707cc12ec871a90d8c55e341ad68e. 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/GBKQU2512163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a232da3e6a49d559e0f99edd14fb72f3c06d2b404b720e46f2a6b6a9ce72c4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLV62410233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49fc44b54fe752ab5e65a87e952245018dd26c1cd3d4fe17598042cbb519190. 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/GBKQU2464257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ae1459afd1d87fa076135d52e3e86b6872cf5a0fd30bd34055d00152d777b4. 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/GBKQU2363042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b86717d4c382b36989da6f436b2863b05fa01aef8589361f4657a3d01f68b9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBKQU2339573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1161b5e4b6014d6e36c10089b6b7deef53abc19a49a6ee8190d2069fd714d95. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBKQU2292262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08d825a66e3c4d178cc7a56bd86bac36db4b6ffbcbfc47bee10cc57b299be99. 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/SKC832042002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb630659da51f5c0b6d2401c6e3b603e768f5a84bb60ad52ef7d9e8938fcf0d5d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2032681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce07b8334f8e90ab93eeaf7e62ec2094d32b469d34e6bb59062a503807391f4b. 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/AU9G31507701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29711accf59487235e7be7121e52dd4b24b49a35df9d965a64c72400c92193e6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLS761000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594233ef344b7ea42e7c070e3d169a36211a34a6ce46fe68dbd8795175ff6063. 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/NLDD60900095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de28f1ec8deb43db316249c9db8d84469a4cec4b9e4580b7cb94cc9d2df9047. 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/NLS241600592.