thumbnail|Pit pony in Germany, 1894 A pit pony, otherwise known as a mining horse, was a horse, pony or mule commonly used underground in mines from the mid-18th until the mid-20th century. The term
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 0x6c12bd5d8101db10d8ccf14136a906303d6c138583e7c24e6a74889f981405b4. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae26f777-f3ff-457f-b692-d7b23e4fa1be.json and https://artists.proofprofile.net/proofs/artist/ae26f777-f3ff-457f-b692-d7b23e4fa1be.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 0x12cc804cb49b752a1c95c65d43c10c6beb679644b60f2da00af1033256166e91. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/SEYOK2000526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b584348a838ae980f8a328dd7b6091a02c0400426537f69e7417bffbbff76a2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:10:13Z), 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/UKASF1700249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b55bfd9f9551576c0482153ae41a8c369853195a45b47b26f59d3cd81c41bc2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USZXT2352383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0507163e2efc07ba4268e1c9b0150c16c7bebe8da3be67ab137b884a4a182d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USA2P2459555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1e5a9b06f718722b82401e88d4c83b191d68216bd566f9233668fc3c9633da. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2459558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e1080f6dc25ed1f38267571ec126d545b690d734579d4adfc826264c83443b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:00:48Z), 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/USA2P2458014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a11a8b3a07c799cb44c4d9f4694e3bd31b60ab78fe6bd0ab490c1b2fdaf7e67. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2459553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38669346434659831911c18cf474806dab121df18a699cac20e69f7944b2325. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USA2P2459554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0507163e2efc07ba4268e1c9b0150c16c7bebe8da3be67ab137b884a4a182d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USA2P2459555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd84ec8ab8c600b3cf5c40024763de6a188850e315f69fb7999e7d0d49e30d3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P2459556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb90c20e40c562d8472dfcee1d1a0d5353d296f5857d9adb4b409a7358fcb266. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P2459557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8118cf5bd76cc24a09f8b2f167ffdeda044fbe3ba1d99b57b9359797669a4c25. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/USA2P2459559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a534365f4c74c17280c5018be7bbd41345f54d1811e131c461d50834cb3a167. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2459560.