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 0xb339b12a31983bf821c481b6ff8181da35f4e8181926d9222596c8290f81b477. 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/9aa062dd-aa39-454e-82c0-161917a28f3d.json and https://artists.proofprofile.net/proofs/artist/9aa062dd-aa39-454e-82c0-161917a28f3d.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 0xc28302d40abaf3a36c71eb1f5d71c188adc2387c050abb6bd95c5cb46b5422f4. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/QZGLS1930187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c240a3d42ae64997b1b5bb4548f6abfaf8a9f3667b6d2d7ae91f824ee16ed60. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZGLS1930188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56100c9007c1d799fd5647015815d4eff56c82a770bc952c0ee4ce313b768d0. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZGLS1930189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33b18f0ee6ffec77ae6a80a0c15aa2f94a61bc3e5c028076eb8632932b946c0. 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/QZGLS1930190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd394a4a1de51df6c2da011c40b6fb0f1d0d4e83cf83e8bc3c087a2db39e2733. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZGLS1930193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefb7a56c8dee6c23d2b6f07f548c32c878af200221597772d69060d4d850259. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZGLS1930138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0eac6ca0e086e14064b99cf639dab18d94759d515ec841fa14f681201cfed4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGLS1930139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ec995df74eb296b4b5e97f314c929317b2e5e07efcbb9146e97b0431677dc7. 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/QZGLS1930143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb516b33e06d56fdbd46680c09d65cd6aad74401be198b64d14bc0d7afe1d2a6. 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/QZGLS1930144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d22b5e907a021d80e86d4d309c327850b3087c890beb84adeb531cc213b19f. 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/QZGLS1930145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680140a6d058a850de0c5906f10592435928b5a1cd36ccb708780660cf6455be. 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/QZGLS1930171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342520317e36926254142e7b87a9f5bce2d9463c66ac34821e260b21e2259275. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZGLS1930173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fa40fc5226699e7b335dd9f1a08c7d42dc23430b0fc3ba483617bfdda239d8. 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/QZGLS1930178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9b2d7d32cc900a4856aa4a5342012c134a8cbe0550cae125b2addf114d7526. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZGLS1930180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff460538ed4378688a8352b02268135c8e5ba87868bcb49bfa3e1fec2ef72c02. 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/QZHZ51906169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb535097faeb11f2482d1abf414fef072197dfe2db77fb2d1a9fc1ccbbfd29d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9L2415174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d73eeb2b56f7f36197f537683f9744b6d95f6f221e87525d2c768a8cabf526e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG1741483.