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 0x8f9f47e2e636e54720381465e7830ff67dc1a210a89ddc19d98fe0c8428dd4f6. 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/823a7238-8ddd-4ee0-8e7a-23a40b624002.json and https://artists.proofprofile.net/proofs/artist/823a7238-8ddd-4ee0-8e7a-23a40b624002.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 0xd7736b1ba55220d686fc7e20d33c01865cde3e77e7971704b6a3fcd00cafbb26. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/INS402100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bd24e91f91e10e9906fd1509c9156443c9d5586b3625f2681875df949bdda7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/INS402100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4c85e9c5971b704afe2663fc19a6473f1a82e8dfff53638e51bdde8acebe35. 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/INS402100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865c1244247dea75ac3a637a279fcf7346d3459264d37b0b2a0bcf84944812a2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/INS402100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06d25e42876be6c95822134b85eb9f3e77cc0c95e906d5d58d4d5940d09f6de. 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/INS402200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c41bf8fff11878399857f62b402b42eb4133294333e7f878a7592529093cd0f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/INS402300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aae5715a1c5123194ff5cb9970ea0533ede9a8c14db79390b5247bbd555577e. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:20:02Z), 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/INC622300920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edf10f78794bd09801c73694d7c1057ab87cf9cf1202a00cfd1885be846681b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/INC622301153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f263f540e58c93e1a62563cb4752e521d8a3819c4ca8aefab485677d671307. 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/INC622213140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77cc453dcbcf8a13d68f0c421222afb8fd859bc00b9e0480c2523d3fc40bc45. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/AUBEC2424180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc414ba20ac3a5ed828503b218f285813f5ff43bae7cb5c506c39b32489b947. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FRX282421109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f263f540e58c93e1a62563cb4752e521d8a3819c4ca8aefab485677d671307. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/INC622213140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aae5715a1c5123194ff5cb9970ea0533ede9a8c14db79390b5247bbd555577e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:32Z), 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/INC622300920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d55a7924f234ef2b96992526ce36d35d0d822189af70388c3be1ddf45178b3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AUBEC2529898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cf64745b1ca59893dd7af05caf16723f9182833b6f6086231f820a34eca1d3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA062450432.