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 0x198b050a25dda2bee8fe5c35f990473793f73d36ad2847656df0993b3c4ef39f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/670222ad-a75f-4bbf-bbaa-2980b35eb5ab.json and https://artists.proofprofile.net/proofs/artist/670222ad-a75f-4bbf-bbaa-2980b35eb5ab.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 0xd18f995d8b65b715d112397351e369ee275c364981c124e63b796f196603561a. 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/DE1BG2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38105e4a21593f2248b60bd2a81759618582b16d9949912b83ba56f09da6e826. 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/DE1BG2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2968e6f34e6322fdf5b1bd54ad566a25f0c1dc9c85d5c215a6b98b7c96f76f4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DE1BG2300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d059641141993afd4d9d6d30383a72b78350784e8ea65f8ba708fd08ccfd2e. 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/DE1BG2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2968e6f34e6322fdf5b1bd54ad566a25f0c1dc9c85d5c215a6b98b7c96f76f4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DE1BG2300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63334b146b8f37f8ab715c23cda210401e4c6deed7a212f66e089e5a595406d1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DE1BG2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29aaa6ad3aefaab731a529af961ff090f5ec53ccdf36bc70585c74503e4df7a0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DE1BG2300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38105e4a21593f2248b60bd2a81759618582b16d9949912b83ba56f09da6e826. 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/DE1BG2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd824124862e19cec042741b8ceb9bb8277a661393d4a6ffcd6c256ff3e29a8ca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DE1BG2300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d059641141993afd4d9d6d30383a72b78350784e8ea65f8ba708fd08ccfd2e. 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/DE1BG2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269e739b537960b2a086b2250e6caba3f4901aed7bb2132b31283700edf6601c. 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/DE1BG2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23addcb564effb42ce5fa96d69a94c7f0530246946174f378a8ba46941fb5838. 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/DEA622100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcb7a7ada6855993d3c3dd52eadd1c7cafdb7af5023d9c9f26092c1b13752d2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DE1BG2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761ad5c9412184e51395d107d50323ddbba433bc7758447d0875b53de24054a3. 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/DECE72106208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0ca6b7ffd4d52bf9027615b4f19a8dcb187cbb3958e63670a438417a9e3b62. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DE1BG2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0ca6b7ffd4d52bf9027615b4f19a8dcb187cbb3958e63670a438417a9e3b62. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DE1BG2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a01cd3743e006fc62c04dc67ad2d1d4f3dcc319dec8dea092b674f4507faf68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL1LU2400083.