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 0xff86cc1d79ea21bf6ec1bf43ab3ba0ec282149d1fbddfb0bb46542b32f7f41d9. 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/b00514fc-fc56-4270-ad48-21d2f38b75a9.json and https://artists.proofprofile.net/proofs/artist/b00514fc-fc56-4270-ad48-21d2f38b75a9.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 0x1aba041cc78700433c0c5f881252eb0b010c1b2e80a5b24f6ff59a1c8d67f4e9. 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/AUHS00401807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62ad19fa971a8aac2668283f8a50e2c6155b5625666cb2c98846046b09f893e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AUHS00401808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed1f4265d87f3f309460eed832dc95bb12e1e325727b0f624bf9f370ef7ddaf. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/AUHS00401809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d717dc95c1e7d81261b68d2bf795bac0f8b4da18cc89058762e9bfab4c5f58c. 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/AUHS00401811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33c654ab910af1090fb19d7d886c7e730662a9f4a10983aed8ebc082f1d776c. 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/AUHS00401812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca7b4f84bdd7b2b57345d5a711d0154e2419a890442a35e1aac6614f97fca29. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUHS00401814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e68d8e8c55d4870a3b8ec18bacfd2308c2dc3f67ab210e423d5fb7450a4877. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/AUHS00401818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac69104d40f18237aff173d17edfbe6296fd2e0f7c06d840a8f05ee299b574d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AUHS00702690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0b365e6b283551744b6ee5a07eac43f8d60f73ebe8a45fdf13bbe9c117356b. 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/AUHS00602243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2d002cc19e00ebe57e6639069155cfef1a50ea2e645959b62913d3a7d8239b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/AUHS00602244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21be326ef8a32c1097c0bc6dd4da4203661fa70de298c4035ae54c4e7b3e7280. 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/AUHS00602245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1e0219764daee3bf2ef9ae254ca5a0ed43a884d8f76090abee31c54dcab9ea. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/AUHS00602246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8953f5a7ec30821d9dbe7f62dfe2509eaca55caff3c2ef2b41839b85a04b5c0f. 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/AUHS00602248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44fff7f4dd6bad30b1fcb1bcb5feddd0433236a1e084289f61f150c5d13228f. 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/AUHS00602251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b038ce14a6322ee5598b6743303db998a752549b33e28d4b2c8604ee285af0. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/AUHS00602253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a93b3d8a17256b53446d3c3441f3c038f97caeee196786af0c9483e6ea489b. 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/AUHS00602256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b41e4a901d4312b23aedec7d61ed71cbd188e9c09f0c214318f1f6a6dfe4ce. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/AUHS00602254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84d2401cbb77059ebce545a479dfe63f5f0910c2a07245546aa71e645db374f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUHS00803085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f32331244124ce5ea1a6da59242a087b297eaf028e781949243e107bb922a44. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/AUHS00803097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829e9d27c2adc5bc0827ca3206ea622de23103b5b2123af63d7a569526023554. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/AUHS00803096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e383c625bf9c3b24cc6b25da45d94982152b85ce165e18da18ebf833ab86da7. 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/AUHS00803094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804f25226941100b1403853c1885e53b1c2f86c5ba92fc32aab54fc13e572255. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBDPR1403237.