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 0x5fc770361b7e1ca0e647e8bf053a7250ed66d4bb1180b943e0f1f604ecfa231e. 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/96b62e35-69e8-4403-8e93-97f6c4a8d46c.json and https://artists.proofprofile.net/proofs/artist/96b62e35-69e8-4403-8e93-97f6c4a8d46c.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 0x06ec9702f6f1526e5325c06239e5c6beb9fd720c201a2701469be7f0cbfb003a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAW3F2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568fd1cb9cd1ef5fd1d702fe5610dc6aa8862d3ec695befba738e5ae052830b1. 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/ZAW3F2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb116a4b0d066573b4430d279a0493be83890ddbb9bf39c0e28a45e0ef6882a2a. 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/ZAW3F1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a193a97decb9e86fe78e2eba316d842a9abf5dc703916bb0585fb1a8514e596. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAW3F2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8278053cc3349add0ed8ef7e2eae6115c26d1ee4d2e03be00f577cb14e223b99. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAW3F2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609c3c5cba224b49fc3cd8ab89f6a2cf6dd0a5440077a649898ed4dc40b90a3d. 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/ZAW3F2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0772c9dec03172dfb7e8cc5505ab0ed699c381c7c95394da97ad6a70169d608. 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/ZAW3F2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a123a8163fd10991269eea476fcd05b63ca162b9c03e34ee561ff701abb382. 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/ZADGR1000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd114bd64fe32925beedbf807bd3cd953e815db384ac2638c8c991690b4ee583f. 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/ZADGR1200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10cd7fd2b3491710bb5a87b2567cfe8ebefab41a4adc0fedcb3fe94d012fd19. 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/ZAW3F2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8027098c532eb285592c65a067566682ca15fd9b71b06d1179601277efcfe53b. 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/ZAW3F2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2647ed77f215c7954c642e03c70471e9c60c752b09c1d473cab5927ac81a6eaf. 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/ZAW3F2200003.
Take It All ( Miza & Regalo Joints Revisit )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab869e50fd15e5d70a480ce122565e4ba7e0b212b7f96c1582ed57843ff29a58. 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/ZAW3F1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0eb310692f77a5f9220bdf5be19256287fc6bc12731257270e0f1c5482248c. 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/ZA82I1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb116a4b0d066573b4430d279a0493be83890ddbb9bf39c0e28a45e0ef6882a2a. 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/ZAW3F1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42ab96bde10b1472ac1ea03b044327f382f77f46bf153915c53d6e619f7f39f. 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/ATR981136542.