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 0x82c17cf93b2d7a3f533e1d8370bc6b9718035b0baa42a433f48882f245e62e9a. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6fc4ed0-efb1-4e4f-a448-7069a7b25c8d.json and https://artists.proofprofile.net/proofs/artist/d6fc4ed0-efb1-4e4f-a448-7069a7b25c8d.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 0xe4b1f18db1801584043245517aed9681e8334515fcd4843ef540cf24cb140e14. 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/GBKQU2343231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127ffc6d13dffc62041e7dde1926edadca165956138f63ad5fec12efc3cef321. 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/GBKQU2343236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dadb02189c109dc8a032cb3ecb5f01a9fbeb83b990d629d9a26c6c67ecb601. 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/GBKQU2343241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff2acc897d9a1fe2116501a9d9146aec7aa69c1f14a4070276f2d6a8369b91a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GBKQU2343234.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1428a870560953f925d5bce91ecc86008a4d8352a00a7bd59c0365c899c18c0e. 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/UKXN21963092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643a8f4c3f943505db2210c9d3d5bdd8e571085ad16a4fe7e938b8f108602c5c. 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/UKXN21963101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8286c623ca007b3cd7109d0d2d82bafcbcf214742c3ffc329bc5487eaf86b74. 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/GX3Q92074692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451249187b0c89178c5be3bd66511b1fbf055180c4ccfbc5e6e5bde4ed89bdeb. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GX3Q92074706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72aded8d5102852b70f595b2437cf40cbe82d08699e0c924823e7bc080338ad. 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/US83Z1923256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e19a8eb2562abc7151c4c01d687c37c272bc572d3e6bb56a95c42196d87c22. 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/GBLFP1977917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaf786d0289e0970b213fb46e2c5be14072a7fe5a92895a27695b99da72d3fa. 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/GBLFP1977922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e27a810bff588b045eff41730324994d33266572bd80e9b23fbd284855b9c25. 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/GBLFP1977925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366c7a615798e218d68e1146f7c43b72b877435b9dc4c7e249706a3dd2b70629. 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/GBLFP1977850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d47b31840e082c148778796adf7a0f48aade2208a91c7cc2e86056ad707ab58. 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/GBLFP1983351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ca724f56be616a7fa453279136aa71fb048cd4a4a3dda95e531127a39a5834. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBLFP1977921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f0ffd943e00b6566a474fb283dd3b9f67a1492223201ee1b3c4c6749473001. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBLFP1977926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2c61b77c84ca1a13e3c249ece88ea866c00439dc23a02248eb7a3e43fbc11d. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBLFP1983349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fdc866f38aef6c1acce029ea29f53dcec8a942a64ea28a5804f78104d84f33. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/DEAR41978270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4c47e4b04b724c318a1e5caecdf790d61c22c2d07973accd7205b007c0b143. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEAR41948795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0291c42948e012159f976874065e2f74704f395e4bb350f203bb831e5666aece. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEAR41952957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee837200d7097944eb3aae0367edf14ae5ca5d277d6574bc7a1f21cd881414f4. 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/USA2P2318145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a197988186f79954013cd754b2dde876b45de51aa9450f7b037bb70f69be7ec. 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/USA2P2318143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7052dbd3374ad2d3f9a47ca8d68852e22fff356a1291e6d606e9c19b6930df7f. 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/USA2P2318146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b4352259cd1313e5956178edf30321472ba4b88d856d92e8211f58a7e86a44. 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/USA2P2318147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa874280f63ea8571cf79bd31444825b7268ee9e0963dc2a600786225e4521486. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USA2P2318150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf438048e65b07cecde067ea5ece8d3ff7f4398f3f1093e6b827298689819271. 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/GBLFP1924626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1175de738958255eb193bf44a27c39f33dd2f67a87f9b9d2fb47c979882ea779. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBLFP1924657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52063f3936c6adbf4fdd1ff3a50667d315fdfa6b3f3508774e6517cec9abe18f. 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/GBLFP2118722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78c91adeadc9f144f63f15b4a72f76c97e788626eed220e7616616470a9b809. 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/GBLFP2118725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c60451bb1e4533f77a8fb75c38da5ab51dc7e28f00a50e90c7b26670125dbd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLFP2118727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa11207ecfaf8a6674cf95c2f02fc3027a70f22c14e2545430baec09c689c27. 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/GBLFP2118731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec94a39ec31f55a804ded75547e8b91dc4678094e35b52fea309b5a9391cdc5c. 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/GBLFP2118734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612f8a1feba6dcb9a0ee1a3efe1ce4edee27d5d5168b43794988fbca3efdf1be. 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/GBLV61930301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea99f45a87954e072bab7f3c5a5eef000b78f5b3ac622d79aa3013defe764bb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UKXN22126492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a917a8b6eadd0ce45af65e921fa5629f4021cef0aabc962af3937e8dcdebdbf. 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/UKXN22126901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee5014d6f35e737ffa2e8fb1b946b1d51a234f8b7e0916e138d86cb7eff3422. 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/UKXN22228841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a40f91212c4bc868b60aaa2c3d84550e0d3f9a5e95bbbbe19587069f8da7708. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/UKXN22228840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cff5bc486b86aa34dcb46d0f54d49b67ee6e1e303f4a3c8e773bdb4c74c57d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKXN22228842.