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 0xe4dc5d51ca02e99ab707780f16d098d119ebb8e88272cb13ce82eb3c4260c3b7. 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/1e1526da-6692-4b84-88d1-1eae4f807ddf.json and https://artists.proofprofile.net/proofs/artist/1e1526da-6692-4b84-88d1-1eae4f807ddf.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 0x4a7d7a0622166548ab744eda104cc5ddfe87e4eedb327e9272a41933384053ce. 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/QZW9L2430352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130bec7c885f3fe8274fd1df00635421baf4333d09310b1963158b14b45c62bc. 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/QZW9L2430293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2b2613b164661e8ecf60a170bc5b0c75463d5c5b1172d3a12a8af61dd9061f. 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/QZW9L2430290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa634131d604b9cec3aace3cfb37a1d59d43873a6877fbb5533a38882fc251b6d. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:15:39Z), 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/QZW9L2430289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf653fa3ce554c6163e100c3a05513382ef1f2e239083d3cc2048c7815800b714. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZGLS2520747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7a6a529f973efe87e27ba0619358b1b4625cdb374e3ec76f801547bc0fb384. 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/QZGLS2520746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cf8f32f6aa3681b54a78bcd1f807935dee5007bca2370f07eff7836bb9a572. 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/QZGLS2525108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadcbc946284abd80435eeb3cac2576366ae9b23407f4cabe3b189eea0d17c87. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLS2525135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80546a35426afe2dcfd1a18ba1f5658cfe5167d8e040ecc20180d658e06b5b94. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZGLS2525097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272ffca4816fe01cc67e4297fa5e91dd67e2978bc3cbe29914f37036b3469397. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:03:39Z), 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/QZGLS2525093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2de3430499d13cb5cff15436f57724334fa9edeac58fab1f30225d4d003a72. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLS2525112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38af5f5e56c7a5a1b9f3461e942d8e85f51b2ed04e17e916fe897e972eea22bf. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:20:02Z), 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/QZNJZ2519452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc03b6dbba8b5213238cf26e556457f69f295b03a4318b71b32b77a7758acfa3. 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/QZNJZ2519438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fd1a4a11a817738168cd59403c99b22d4b75ed53e09a98b8e06779ea15b6eb. 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/QZNJZ2519435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a289f942b1a2adbbbda5d59000987a7642833bb76cb0e3832f9650c86f57438. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNJZ2519414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b03ac803743b861cf01a7c016105d9e0233666a599a6ed072779d6d53ec9eb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNJZ2519375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa612a3309c1b8564b003333de0a1e5ad307536170bd2e8622569fc956f688a26. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJZ2525154.