thumb|A raw rib roast thumb|A serving of prime rib roast thumb|Wagyu cattle are an example of a breed raised primarily for beef Beef is the culinary name for meat from cattle (Bos taurus). Beef can be
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 0xe423f55ef978025a408a7b3fa93749737f0a35aaf69971bcbb3313b6c6e52e9b. 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/b5896c87-caea-4fd4-a355-a1b49873b5c8.json and https://artists.proofprofile.net/proofs/artist/b5896c87-caea-4fd4-a355-a1b49873b5c8.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 0x3829f6c8dd66d469903018a20339f58bfa2651a3b638dc32caec615ca0b162c2. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/NLD320100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c317132ef03f968257be8aa599e646b1ec561a92916e9e1e81794c6ca04b69. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLD320100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805c6a58a1c4dbbbade88c91bf4859203ef7db255922bb5ac042e1013bc064ca. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLD320100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60d549b47e4a89b0bddd07aa5292fa3d75191906cb382c9e3c63064fbf9791a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/NLD320100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2933957ecc547bc5263e70f63d8f85181cd4cea0bf1af74ec0f04ed28cd26c62. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLD320200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6198ba479c754d07e03c8b4e9852bb8bb7cdf22ddcdb1cea0fb9fb78688c66. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLD320200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedca92af17d3357c72ffb238df66791b701deaa26064af7dad1c4deca4bfee11. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:32Z), 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/NLD320200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e63f26d15d082e4815024fe95824a392fc22d4e9f354951d730b7cf8c43773. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLD320200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebac3bd7cfeaad9be8a5486a563037f9e1a71ebd3c0b1e7819dba9aedca95ba. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:52:05Z), 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/NLD320200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a052f69bdf78d4203e2c2b74afde48dc28f5148243db020906262dbe086756d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLD320200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9033ca71a3ae0e46324a9c41f39e18024029ee8f36850b8886b5050d4f0be0a6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLD320200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7eba7973279f3373a922841d720173faba25456ab115bc43aa063854eeb5575. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/NLD320200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f5061bcf4b20ca28ef4458d5348145e3b194f1526650320e68d0f02398ed2b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLD320200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fdc1051d3959dbd68f6e078c35500a577bd68f8ae90d674142e4348f10c932. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLD320400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98b891bb77887ea7e4e03d2ec51c77281c203b4e4b332666a4304c8581303e7. 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/NLUM72200053.