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 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 0x66894e01762a8d8fd49e1142fda34006ce1d69cb8f89d56e2a5f1b89c8830656. 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/68e3ec28-34b3-4f1e-bbc3-6986ea54efa2.json and https://artists.proofprofile.net/proofs/artist/68e3ec28-34b3-4f1e-bbc3-6986ea54efa2.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 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 0x0b1cc1ec18798dcc54328f580c5cfb8dba245c796394a91f88fc39abbf9ca29d. 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/GBLPF0274325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6195ef740cafda2d1284f9f373c064dabece577e5ab53f346246e95a4c21881a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBLPF6672772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31572a0f57cf7131005e9938c189ca790c7e809e1fb2a1e700f4a832b86a90f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DKQ4A2102601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8499308602dfc7f710d67e033c02a916425c7c5b2740c7e4b0397fb7377a8fc3. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DKQ4A2201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3c387d2a24bd3fee4d3b94aff61710ddc2dc20284eca7ad3f04836cb50d8fd. 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/DKQ4A2200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680b72929ae2bd39b55ac7da76a5e0c617052ca78557bbe77f0ea0f15e501bd6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DKQ4A2200603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96aea1fdfab0ec78bfc956f3191142a342c0a2bc1621599697b1fa54e3ff79fb. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DKQ4A2200604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b55d0fd32dd9262c6a889c7f60cf613c165fee2adeedee57db031f9a6463260. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DKQ4A2200605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868f6d8eee87a7f17ac4691c8babf7f9e326e0c9d8337e2da3f84f683232422d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DKQ4A2200606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d48373a74f449ef220cf32a6cace55051fe07e1b18a7021d29696573d4d8a32. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DKQ4A2200607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1f87d894f86a90f370247ea00a4939e29dc385f37b7795182cc924f88a15a0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DKQ4A2200608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3301e773dd814e055ea37ab793f90204221997098cc47428bcafbd575ac89f. 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/DKQ4A2200610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26e131f494077c667557052b7affd245dbae208b61f8db8963755f1bd0b232f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DKQ4A2200611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3a3ed73af2784514b128b02465ec9b1595f072855c129e1cec47e99595c028. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DKQ4A2200612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2154d57bf9111c47b8ae55db871cd96aa5985c694516a40c0efae0577387a2f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DKQ4A2500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33e2894bab585b40e7684543abff9d72f343a0629b528b24eec20a508df2ea1. 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/DKQ4A2500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec02037ba12bb344d3e0351e966b491e15c1783db5790247ab8fa93db4397701. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DKQ4A2500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2154d57bf9111c47b8ae55db871cd96aa5985c694516a40c0efae0577387a2f. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/DKQ4A2500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7b531c9ff24348c53233b27b32dc3c4ec536ac8728fbe0334bc0ee18c7c168. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DKQ4A2500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1003c85b2fc2a00b564887cff3757a35550e4d764051e4d440fc951b423e4296. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/DKQ4A2500112.