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 0x61cb72853df81eb75f2bf7e783444125f2f7f85ef612ce0bb357304b170ce2e7. 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/92c53865-4a7e-4d54-8855-77d94ef96711.json and https://artists.proofprofile.net/proofs/artist/92c53865-4a7e-4d54-8855-77d94ef96711.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 0x518e2d6f5d33b738850a15bbffc8104a18ec554948ef7a07999c28f544ec1cd0. 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/FR59R2213815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74004a2be4f1f2cd0872c91773ab7946c321d97a9e74b5fe51cf79d7b8c2c8d2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR59R2214507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6078ccc5df8bff83fee433a5b3de2a1969900ae021bfe2a3bfca808479763b9c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA062201639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adb2f59e8d73233e669c31bb98a63864ab47cf3053a6cabc556ee8e4b0dc261. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DGA062201640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe233d119971bc1ad9a1e80d2082d5e4ed7e81e2dfb9a35c7a6e6b43c401d183a. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/DGA062201641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7b85d896f35291f4621e1b9959ac3555b4ba72861fbd0b03c0e29265e73c03. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DGA062201644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d817cd1e41c9c2b2746ad632415c6435a16c97500896c815eb47de239fad2e9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:43Z), 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/FRX282349954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ac623a6ec79d44bd98afb881bee8130477941e8aad4cea5234549cc72b2fe5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:46:10Z), 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/FRX452368674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b1bb63b55a23fcc899abe7f15b46f5c7f8e5e7ef070f7ff897d6bc186c0ff6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR59R2426993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d400e2eeff90b5dd1949a278ddca3f0ee99f6543fc244ea6fe25ff69d6070b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA092471965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77befc9ee74f9ccde8be865b3ea5ee71e1a1eba6b6233f6626f7b9fe0ce77513. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/DGA0P2439526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7f995ac2929c7ec9a65b049d5f7856370bfaedea4979e2d147299fb9caf5b8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DGA0P2439528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb052905163f3a5b0d517fc01c5e531d4963e264db18a26491b0c3c80c07bad41. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0P2439529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4868ac6ed0567eaebd6661a8fe89efc1ae8c6d2c86778d7744a824b8d6db01. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX762501326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0193b74328940dcd60cb5ab4806b194d5447d2a28c25954c9903020a3620fad0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX762557402.