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 0x358857e73882e73ebe98392972202e4230f676a410c9fc80682d9aa1ad843c97. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5943a64a-2945-4eea-b3c2-0d404635cee6.json and https://artists.proofprofile.net/proofs/artist/5943a64a-2945-4eea-b3c2-0d404635cee6.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 0xbe793e171ee95719cd3ccad6a44e47e18313e07c096b76b0e6e88f630ef35fc1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBUZW1000415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1ca6e76563a5d2436f746fd4cf1a07b9b64ac15b4e3eed2edf975633bbdd33. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBUZW1000421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f01d45d69c73a7a782e4a4bb382e745fde5247690fa230d82d296de5c94a036. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBUZW1000423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaae18811c2b1e22553d382fb26e7498b35ce5e64ce1c21b6d37fa70cfbb84c7. 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/GBUZW1000427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823e745fab5fb0ce0b65cb688379f9a84ddd137c27416d1b282b9f36c7f12df3. 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/GBUZW1000416.
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 0xa2124177bf6fa6b108acc050859edf5799f41a1f4f7761be3fd963103ff45bf2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBUZW1000417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad425f657b93bc943f02b2f37809e44b4c6f01fd59a6463f25c88f70f69388. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBUZW1000418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a6e6166fc8144078c59c7b0f6021b844b1bb71a13b26072ac3d07254158a22. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBUZW1000419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6672b619ca96bde2bf9aa1855a87fda13ba8fc11b6ef484c2616042ca2bb672f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBUZW1000422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272b97012cc1a63dd1098406e2023bf31858ebcad0ff5fa3e4763d1a7cf58712. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBUZW1000426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a67562e40318cb5f39e5335bc634f418750f4edd7770e4c77d5f85dfc3f31d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA370602566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711daf212f0fcad70bfdef63151e27ebaa0a3f9b1b530845794c49c6066e28e5. 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/USA370602567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473bb53326503f1290f3f8a4d2e9df7a1168e4c4cdaf6784e8cbf9a9bb0ebb58. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA370602568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7be801cbec579a13c94c8176b371137bec357310cf6c592bca8faedc1ac8878. 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/USA370602569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e16a0278430159755301ec109dbb24c9ff52ebbbb1b40e684b58435b3e5992d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA370602571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e1b49f21fed9a101120188ec47d3fcfdc3dcdf57e4807d33e17422a494bc9f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USA370602573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb299f7bb73ba591c2915066011236650f3faf5f4336375b5f61538249bda7aaf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA370602576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4642e2608cfedac8029267ce58bca0ff97054b94a1142a1d1cd133c771f25e3f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA370602577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449583bc86635d79ab5d78e17e3d19c20ad77bebc55949aec0188a5f69cc4e33. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA370602570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5ff76e8ee530970a3b64c0e11a06946d8d247be42ad6a371a7397a8a1c1f28. 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/USA370602572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c8fd53eda14f3b7ee32fe219e40d8fdc6e1abd397dc003c5af837042102ece. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USA370602574.