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 0x1622e81d66099871c72638ae975bed083950b16d22c1798920cb24ed7c539739. 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/b007a6a3-9f40-4c63-b002-63b5dfea0ba8.json and https://artists.proofprofile.net/proofs/artist/b007a6a3-9f40-4c63-b002-63b5dfea0ba8.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 0x5f93c975833802ae10b2d1801d7c18d588eb39723787386c0c89d66ed63386c0. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZFYY1950142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f6b90d4b537c5d12ae89c9947a9a6c7a38feea387398fa91d1cb6ce0350bce. 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/QZFYY1950143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419b2bcff47ec37b3659ea7115f89d7dd80b1d9a605093fbd81bb6bc968746a0. 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/QZFYY1950144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bfbbbe639202a9a081a2d14f07d6a78a9649a22606f53d22de4744f0ad2f7e. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZFYY1950145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178ced040b32361d35526e6db2c6f3ff25d8690795f20e1a43ddc565c4e665e6. 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/QZFYY1950146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7417387a7d4f8bba29774bb3072108cf479ed11fe6c994c523de7930fb1371c1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKXN22105740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ccbbb6b339209e47fbbbfba1a5af5978ca17c5f4e3b0c36b1a29547cd3ae0f. 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/GX53U2006886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5547ebfff009bbc0f4702106c50cc4a79d010685e041241ed3ac6060bedd1769. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:35Z), 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/GX53U2006885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b311eb9b09749d5e3e073edea145a12b8e96ba924e0179528302ce59329afb. 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/GX53U2006887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42b96b36d1b9208de12b956871fa6e13071b0a1dd2f2ed753984a6ef8f61e1b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBLFP2255631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afb4e19dbed1d02036fdff4926440a06cc7a0c28eee5f422284971fcbe7c1b5. 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/UKXN22289311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9e77d7292dd53a68aec66a55da812241a92026779c8114b694135fd8ac33c1. 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/GX3Q92380143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb7f026165df121497d900572d3ae915ae8fc2109b7ac666299ad010bcd64ad. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLFP2368146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea77e949659ffe8dcdd7350cccf6688f8a41a6f2d4b7b70a3cbfb486a8b4000. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/UKXN22341727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91de4e6cef3f8becc95370cfc6faff45b5c2d90175eaa94d611fa1046569531a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GX3Q92473817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a77c5c9b0c3b423524cc728a64594969bffe18c45c71cb0292f1666911a2d9. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:22:29Z), 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/GX3Q92473820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d199272a185f05e0c5e2f05d6cbf04347cb1254125de4971a1fd42ca3ad72e. 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/GX3Q92473823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80b948c6c3d5a90c4b448898a5d313788463f5f56525ab63822682def612834. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:26:02Z), 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/GX3Q92473824.