thumb|upright=1.5|Pegasus attacking the Chimera with his hooves, above the hero Bellerophon, on a Laconian black-figure kylix, attributed to the Boreads Painter and dating to c. 575–550 BCGetty Museum
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 0xe1af14f2fd533536a5f8b53c5402fd7c4ad6391ffe60a3a6cde3de136ff6aa96. 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/281f158d-2a6e-4dc8-93bd-490ac3bf3ef4.json and https://artists.proofprofile.net/proofs/artist/281f158d-2a6e-4dc8-93bd-490ac3bf3ef4.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 0xcf19c7f49b71b1c96bcd464b6e9ab372288b2cc817880e6932619f675428a849. 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/NOGTA0800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c56d1a665d06b68740ac28f51f90b26e3fb4112061aa2a33100ce27e74582e8. 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/NOGTA1064010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13844381941ad0c7275691cc5929ead1a1aba792d85128033fd02a9dbda3b0c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:24:57Z), 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/NOGTT1606021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca9406bf402f979ce1396626f51cf3e2d5216a81cceff7997f293107e4b002e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NO60K1904010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c93b93cd366d53b21266b854812d8ebdf2a47a704cf0881b0933561e4869ca0. 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/NO60K1901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0f52a2ab184e98510b57c7a33c9f3c552d1c48222908f19aa93c4ee68fd78b. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/NO60K2101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a83ae61a4ad45b9e737ebd578295649718c1b03c10af4c17bfbb725297ca2e7. 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/NO60K1601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5625a50d93ece7ed0a8fb685b4300666252d5830702ed8a7fe676f7c2497f03b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NO60K2206010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c541a45296e3b075563beacea56e62281b517fbbe0ff0a1e0580b7af56dcdb. 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/NO60K2302040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bf06d0fbe790ab409063d4ac7194c6497ed7e94f88b2ade003d2075a5e6280. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:00:43Z), 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/NO60K2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6ab7dcafaddd0d765cd1052972fc5fe36f8e178d020a3de5df67dd3c479b43. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:19Z), 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/NO60K2404010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8789c07ef4e3ff3e51121b65e2a830419607d98d06c13817f1d701fd22af97. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:50Z), 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/NO60K2409010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9ef95cbb0ef0b2812b375b3d3605e49daea1737b1ea0a68901ba8b96cab609. 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/NO60K2414010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5368df453a501d27c4ac9374ecf969eae5c652da555af072c31a048a29a3f05. 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/NO60K2502020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb783edc3a6efed68aaf6f0f47b0dd1cdade108fd3904bae15fd843694483fea0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/NO60K2505010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ab6b7afe194d9613817ee18a07ec3abfccca356a162b14552dface2957b8f4. 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/NOX9X3576001.