thumb|A broodmare. Note slight distension of belly, indicating either early pregnancy or recent foaling. A mare is an adult female horse or other equine. In most cases, a mare is a female horse over
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 0x21b44e733e1bbea2fd17aa0093952d0bce7790d90aa7c6441c463816456846ab. 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/9f46427a-4b2e-4ee0-9c5a-515bb90e4d0d.json and https://artists.proofprofile.net/proofs/artist/9f46427a-4b2e-4ee0-9c5a-515bb90e4d0d.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 0xf2c4ac1063128b8fdef801f1ab59295ada3c355880b35ce2e457271d328ab851. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ITJ790600237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a6e3ff8033887f9242d45125f132df28daf931f2f971920943bf2a5eb2853f. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/ITJ790600238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34e124d88ee441ae73a068ab4c2a5836e72fa552e99f184feb78f213d80d943. 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/ITJ790600239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8324154069c0e7fa96f2dc49e13a64f6ae7a93ad1d4ee59c4fba9c20a1831d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ITJ790600240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d0e5fbbb3d0d8fc32d0f1f7d6dcb487764f742c13063b0d686a92b20fe53a7. 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/ITJ790600241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a35700de6bf4f45417f248f80d21f5af0dbe7912cdc7f55640d1495c3cbfc7. 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/ITJ790600242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d66fa0dc1220999b8f551a3b5e539c70ad121e5e419e523378992042641b88. 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/ITJ790600243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3816c931ed79275c052343766435db3e69babc706f1ecf625f264d957cd454a. 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/ITJ790600244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e42c27717fb00b04012809d91ec102b1b5d581c87028b9cfb76bbae82c1829. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ITJ790600245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d99c7d6b6f24075e10d5d97856eb3506a0cc83db4491f714bc9cb4be9b3145f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITJ790600246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc702932e92d53e457f385bddcd93bf836eff5e12b56af80bb12b21f4b6c39e2. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/ITJ790600247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5a47e37ce5e14ce6c4bfd5d267b412f08cba13a5b6f7d535812cc16a400585. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ITJ790600248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2788c4299d2f043beb4b032492c977e1804ca81f711d94c574d05b7fd6fb663. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITJ790600249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6437d1bd56a0726974a2beba7984c9313f8c21837146c47733b16384ca7346c0. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ITJ790600250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312a2e65656f1d766b72801f4d6c2f0c3a85333d6c0f29a5172b55de884cbcca. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ITJ790600402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4be0f0a1fb9faf1685dab19115731699ad1450f092499ad0f74ac2263ffbdd3. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/ITJ790600252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4a7295d6a19db27d4480cb937da57336370089e93613d56c96e192a401a49f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITJ790600253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da0153463880e9469b8dea989d7aacd155244c80e632f93d02668388656f8af. 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/SE5W32100476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9f1c1743e0286caef848664c105f336f019f0ed8f7a7591db50452379e92d6. 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/SE5W32100477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd103d6218aa3bb99b3a87a115d4e4ee096996022e2a6a40fb19fd227c3d72f5. 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/SE5W32100478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaed103ca9cc0480c6d63693be817b4daeb9a78870e568549587c55fa5691b6c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SE5W32100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611af21ab731ea494f573c3dca7a999b914e3b19c1a1435e07609c8b824882c5. 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/SE5W32100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc26c70eef54abdc500968b0f55d02cd97338c2415d76c4be4969fe17e6f7af. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SE5W32100077.