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 0x63aa6d7a12a95c0e80f1ea7a7836c2a2bfb994a2ebf0ed673c493b824a6296a7. 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/8260a053-1c8e-4d3c-a416-e5f8edc52341.json and https://artists.proofprofile.net/proofs/artist/8260a053-1c8e-4d3c-a416-e5f8edc52341.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 0x5eea3d6705c880461efb0d82790c947a00c2cda41fc181dfb2cb59c1901777ca. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UKSP82200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc004bd4e502af9f93e734bb9afa3a2765153b4be40739fda582351896ac01e50. 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/UKSP82200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6083223473b722c5ae304536453deebe3b1010b122cf6c66cdb021f10cedbb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKSP82200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2056b0919e0c815add0151f08828ca473a1d5fe4cc549b0a9cbe47aa2072cb88. 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/UKSP82200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0c285072c080dd657311f2d6fc1911ec34ba49450257c1aebb2120223f1032. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKSP82200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa94b18ffc525ae67eed3bf1c816639152e4e34620f5599ff251a367ddc3e314. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/UKSP82200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7299e4065bbf0b8a17dea0e8b06009e9879df8127b09e82d2de0a4a4d0ef83. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UKSP82200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d22bf6d98394b93dd62e36c7614c036acd55157b510e4ac39e6f4e7cc399ba9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKSP82200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc734ae266a2b287a12c97abdc8d88846fdf990eed6309e6b021ec0e028899f84. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKSP82200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b4f5d2d65f3e79ff61d0cda71dcbf6cba433bbe35d194a249b4c15ae8cde5d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKSP82200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141cb2b43ad1043904a3c8ca49b46a003ac5edc411a06ce8802104e19bab673b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKSP82200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7c9d27a2c852f610d2ee7bce2976621cf9d469787b0bbb14def8b965dbb869. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UKSP82200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa94b18ffc525ae67eed3bf1c816639152e4e34620f5599ff251a367ddc3e314. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKSP82200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5696cdaf87403f93cf1164e87c2519f0b82fd9ad5a25846031bd0ec1ad1b4183. 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/UKSP82100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd7d69761082cbf35df8845757dbaeda46685d59b2a06b693a560f01d01e3b7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKN6K2001773.