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 0xeee1a5627dc6f5e269d78890de8f1893f04898f6df9251883bda64c6024e78c9. 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/c1c8151b-caac-437e-9f91-34f2333a2327.json and https://artists.proofprofile.net/proofs/artist/c1c8151b-caac-437e-9f91-34f2333a2327.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 0x08d91bbb5cc007a841244a3aa6214eb067f2ad140a8108f61c8bf81aef0cbe96. 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/USTV10100151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908d9c427d4d342d9a5e8b5efda92473d481a309067b9938b0fbc185894c55e1. 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/USTV10100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ac716ebf96cdcf06ba5eb722c272cd916faa920bfae20db9c979cd22008287. 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/USTV10300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cf6991443125833766f2dc5f2a38f319514de23de1c00708ad65a6790b988f. 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/USTV10200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6353fd3b596d2c4337a4b57e3035bf640f2579780e683eee7000474835d28b. 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/USA371171680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d91bbb5cc007a841244a3aa6214eb067f2ad140a8108f61c8bf81aef0cbe96. 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/USTV10100151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6234d7b004579a028401804b3a46fe075abb1e42130f30b935a47a08bcfce37. 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/USTV10200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825de04a394f1f0d7f95d557b4dca25000050913bf08ab6a62efa2666f9d9d8f. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USTV10200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8afc3f61bbcdd8f8b5558b6f3980963b248a92a68cf6ec48a81e3d6f69f1a0. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USTV10200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4cb0c68f8a0c59260b2b1c33e2cc1711548aca77d7ba1c40063413fc03d694. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USTV10100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908d9c427d4d342d9a5e8b5efda92473d481a309067b9938b0fbc185894c55e1. 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/USTV10100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bea85e02f0fe1bfae2d8a10fa11245d7747f1b5e79a8d55b8b0620877d771da. 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/USTV10400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bba83bbb105eb062523856ce06cde3f8d2a2d24d145845606810a279952ab15. 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/USTV10200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a9700f69c703bdbda8974e04139d9277197a65cbfc98bef0fe8311aeb3b5b1. 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/USTV10200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9225bb75fad6f615c17f978c6f9afeb042d2479c0f0621372f7ff52130567a2. 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/USTV10200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8812313ef8e81bdacba62d074862e3dc4a6033edbe120c32cc229285459d24. 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/USTV10200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c62c6c88cd71147385e04583e983fe58c11d9947b0b97b3343f062243750d4. 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/USUM71013748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bc3131fff60637ff07f86a9c466a6f9cdcece2ed3a838076d7d8467f27d529. 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/USXQS1821722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab45557eb02939c34c33c5cbc464f545c17f6e394a2e95b778e89e63cd4b1bc. 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/USTV10400128.