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 0x10a5b20678b3867b493d9413f5509e41250139476b37b9a1434d0a9de9d1dc61. 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/2609f26c-cef0-4316-b860-d46b3a7512f7.json and https://artists.proofprofile.net/proofs/artist/2609f26c-cef0-4316-b860-d46b3a7512f7.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 0xcf5b89b099492c714e382388df8b6fab0a5173ec65c618b85fd75a8f9907353f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ROUM71600143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae144c20eb28a035e9b7f8a3d16ea4b2388d4d8cbaa7fe7ae0d7bd3fefa7361a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ROUM71600199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e031dbcf50aa5f9cfb5c642a50f73db1b14a5078d7758543bf53f970cb5ae2f. 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/ROUM71600200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e057f72053fbdd487a822c3272a052a523ac844e34a4c5b31980e89c86225b1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ROUM71600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89061d552c12b35a9bb6335d5a01b40fde36b7b56add7e5e51423eb46987a207. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ROUM71600202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c44a77394ccaeae75b3a4e431852e9233d7c130abcf88e0accae95113c1f178. 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/ROUM71600203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0645aaedb3e8a691d5b0453590c99d36519abc2edd86fd5dfebe969ce69e61d. 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/ROUM71600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01bbc22fd8ef5788efec50795543821fc438cdc180a1f5a0ec6ae81d10366df. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ROUM71600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecb3275d5e6fe36cecd6af31df3ae8395e7a85ba219ab88fc6e56ee6f9b5405. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ROUM71600209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d819703266ee63ff6f5f921b7db7053eb1809e64c3e0c1ff064be20ee0a3c6c. 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/FRX452040966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0539ce23c400d7f299cab000b2686aceb6dc1db5dc105b936ea73efcf72a2777. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ROGRA2101790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f92d5634ae97bd1efcf914e63364be568582ad11fa045ba53edb30c79025dd. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DGA082275492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3afa744ebf4a2de6c57f3066c20e686c9b1591d7d80aaefc95ee50a521b763a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ROHPA2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e80f323f11beb2724729340972ceb2a930741d0bfdcb08fa14ad64ee4f370b2. 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/DGA052440203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9d71c65234df1423b98f120d5edf6f58d9744772a25724863acb556aa60654. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:39:32Z), 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/DGA0Q2427421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d87340d7e9a7d0ba82a337c5008a0168a2533b1bc53f181fe79fac5a085d0f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ROHPA2400100.