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 0x52c17cd3e7a176beb3b4992f2867fc2b2a390c625b51c6e2c8600e299c2535e6. 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/2fc86864-e56a-4eb7-8d15-64b78d594725.json and https://artists.proofprofile.net/proofs/artist/2fc86864-e56a-4eb7-8d15-64b78d594725.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 0x2d0c7f5c173fce3f65a2ac4dbb72e34077857bfbdab1196d0b32f87b6da7f0c7. 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/GBKQU1968584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55886b1163c30d496131e64f9ad097a1a34ac5a17790df1a27055bfebeb702dd. 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/GBKQU1968586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154accab2374268494e7a760f9afeac2d31adcb4b61f03ec479246e4bea93f36. 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/GBKQU1968590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae85904e93aa950bdce2ed816b921be5ed8288d68edc519f1aa115ed9aebdbd1. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBKQU1968585.
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 0xf681e8dd63d38e593686758852cd3a79ee213e39a387753fab08632ad30dd35d. 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/GBKQU1968587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40df58894afd12b4464b40eb74344ec8ebada0cabbc49f4f290d2e3a6a4dec4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBKQU1968588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827955a813e56c93b902e13bec62c3054dd9c298116e74a93ceebb49224824f6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBKQU1968589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382c41c2036bda457d158a068df4f7190316d3c12477009551c44b1961c54771. 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/GBKQU2449789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8658b026e2f9e19d29f77de149604ce2eb6cbc05145b4e5e9f2972eed952f8. 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/GBKQU2423907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e7e3a94bffb8fc4c978e3cce6b468aa78ded2182220c69024a46a0823759e2. 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/GBKQU2423903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2095ac3f73e4e156615c4338abe7ecd184f2b34a0dca62d79be19e5ad61716bc. 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/GBKQU2423904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f962355c78ac6aa46cbb537bd64673cafa69d90c5084be411cca19995aea14. 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/GBKQU2400645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8062bf3f16a2b5491a2d2dabc87975d0966af857a9d8fb1fcccb3eb245583d00. 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/CA5KR2430603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2a4f1439ddf38168afbae5cb4944d616ec17d45fd96cfbe38fda4d2718a67e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CA5KR2430602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46398f6afd88b1a25dc3e17fa644213f134795e728cc563b89145799c6a2ace7. 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/GBKQU2400643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93856ef5541dd6afc1f801829f635b49acf597665ba937c5d81f172c3a9b68d. 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/GBKQU2400644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c7e74490abeed8472c3df4250456769e7e0a33b38f512156a29427cf258829. 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/GBKQU2378361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78d45c687a78ee65b4080a1375230082a820bda6bf04dce2dbcdab07f59df63. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/US83Z2333746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a420616d041280055e6187a1f4db86eb3ca2a3b2dbd6bd94b0e439e1e587ea. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z2333745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9614687c2e25d47e44b1075992a79346c8f1ac7ed5f36f0934c15b759193b5f1. 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/GBKQU2331408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb6095f800dd2e795cffafb321f6a8465e80c8e240435db3802a670d480434c. 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/GBKQU2311291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef76199c3c034130f66725341cacdcc0a7b0cf98e632eb6fc6477c9cd5f5ba00. 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/GBKQU2300932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02526e70812db9ec015504817a4e4d9f6a3ffa447ea9b9acaff9ecd9d50dbfe4. 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/GBKQU2300931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0a5610baccf6fb1f6ddbcab0f3c57ac74f0f1328d3893254f6cc321868c7fa. 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/GBLV62207416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e004788c629bbe882db865d55ad7cdc7852f961c4b523c647522fbecafef0b. 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/GBKQU2249441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c223b3e0fa85a8c5e467b961801814696355226125bc652792118fd970153b. 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/GBKQU2249442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84612e887f734d5120c918bb5cb560efe949c912b5788ce108c4ee9f51d77e48. 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/GBKQU2244339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf917c11e84609b1fe685922626e216f05727e4160043d0ef4674836cae73e2b2. 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/GBLV62102759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5c74cae37d8480eb684876e8a7c54181d3692dcf4db05fbb7df8e5cad2322e. 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/GBLV62102758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa460b69c4faedc3a0c24e877b78e953108370f380f9ab5bfb1e4ecd48a7521. 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/GBKQU2177983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5116b5b6be91e6848517ec46d44eb88ac6d600a697a560d5cc1f01b944e71251. 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/GBKQU2109984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ab5681e2bb813ca3bad13176b2452bc70ee1ce22112ea0976d1a586cd9f304. 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/GBKQU2109985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f05515e86cc9a53639ac45bf3f62b063a3a1d2a252d116a605c9f02eb389e80. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLV62024865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ea849facce43703a59a55886535d7aaf4c61f4df6cb9d198b5e40160684e19. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBLV62024864.