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 0x65d6f43949309cbbf1bccf6af41f650f76bb21748b88b2e8c19f2f15db4a98a6. 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/93a6e99a-8d2f-43bb-b136-363121fb8dae.json and https://artists.proofprofile.net/proofs/artist/93a6e99a-8d2f-43bb-b136-363121fb8dae.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 0xdcf71e0dedbc5f5bacbf42d45952770f690f7eb255fe14a9e61cb787d033c21a. 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/USA2P2254080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2354eb2240810f3d3dc94d5f954e0351c4ad67a01e9d1a14725df4b6ab52cd0d. 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/USA2P2254073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedbb6e517b1e95df700a348a75f682eff84cdb27ab02dd8ec77f4e28b260d8f. 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/USA2P2254082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee83179a09ed8d905bb4cdff52202c14b6ded20bac0b1e8b5c6e01b9d22d32b. 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/USA2P2254081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882f2c5186dbcedfe9ec1d50640c8945975c8f09385b1b24f1a40f9146831368. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USA2P2254085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e50bf4191ddd0c344aa8890b52b36489885812de6d80a0a437d69ac3240387. 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/USA2P2254076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000d1d51f08940fe9403c937d12b565b104bd7d3db0c022c8acc5361ff6dea9b. 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/USA2P2254077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b7e1e6bf174b311752b35d43a8ad615279e98c44552ea8dbddc80639b8fcf9. 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/USA2P2254074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724bbeae69a15d949afa7be68d46f80c0cffafa195fb232754e5dd83a5538a88. 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/USA2P2254083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5bede303ab7ec6c6da7eb702b91f31109227d0e10d81a426c3034f5749a073. 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/USA2P2254078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa249def9a5756ba3e6c1581065ea92429987ebeddaaaa299e7532d9e247f0232. 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/USA2P2036683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe673528736d23945333a95cee07267b72cdba4feeba1e09640800e00d773814e. 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/USA2P2036684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7cd2cce45445a794a75243b1cc4189a5e563c0bff19cdebba808ac3175dc22. 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/USA2P2036686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e888eb8faa5ab42f1d6a2418bd9098245dd12c5c860c3d8b3870bfcb64edd2. 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/USA2P2030041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132f5cda7d0eb65d31ea0e17d9d34ccfb5f374a9fae48283b27b27660d54d38f. 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/USA2P2030042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3c5312183bf4440d2ee166a9aea04e1d3659a3d21808b554037277619b8863. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:18:46Z), 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/USA2P2030043.