1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x2ba76a81e793b4d6efca37ceb80f0272e6442865688ae504bcf6c27da4b91df3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4caaddaa-ad3d-45a6-9cf8-7fbe0b8f4997.json and https://artists.proofprofile.net/proofs/artist/4caaddaa-ad3d-45a6-9cf8-7fbe0b8f4997.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 → block OTSBitcoinBlock must exist at that height 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 0x66233a909873ed583476eaa539017ab47028129f8194c4a76037db886f3e71cb. 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/TCAER2071704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66233a909873ed583476eaa539017ab47028129f8194c4a76037db886f3e71cb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAER2071704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e85ea6b0719b1ec073a06ea60a100d074466be68aa2ceae8c1293efe40a9117. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUMEV2292002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ab58382e3bebe3dd7cf41e792253937da673c3bd87696503cdc691a374e3d4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:01:35Z), 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/QZLBC2201229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf1b61057dd1f3d114d509c14cc83fa76bc4048f1eef51bf5236a0872488ea7. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:00:38Z), 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/QZLBC2201765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bef4c53501a0c84008cfdf07732f7e043e82525462f7ed34e56663bf519ad81. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZQAY2385107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87d162aa6103b54a7a08070b734901b3cbd76ed754d9833fddfe46af648163a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZY2U2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c8dbfe1b3ae85a172bb26f95a95b3e5ed3438e99a47a8653098f8e9c8c6656. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTV32415658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f299704a60c4924cf7643c4e8e78272c1b89e2340d00b572e17111baa5ea5ef. 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/QZY2U2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dae530f5127fd3162cba6e349d3d8d69a13debb7c4e60171501f26a76093eb6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZY2U2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d3d76900dda19df787007da114dc4f1f38be24320b1c641a79902454523246. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZY2U2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f299704a60c4924cf7643c4e8e78272c1b89e2340d00b572e17111baa5ea5ef. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZY2U2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dae530f5127fd3162cba6e349d3d8d69a13debb7c4e60171501f26a76093eb6. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZY2U2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ac67573aeaf3cb300da4ee8cea698b1e0956d667a55f9854749dc4c098b59e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZY2U2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d3d76900dda19df787007da114dc4f1f38be24320b1c641a79902454523246. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZY2U2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbf7f8cecc42ffaf1199633fcc543df45093a3269337d0d21db19dc7a9f2c3f. 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/QZPEW2518914.