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 0x48f7e87086818d7b3154c776bb1baa9daa8483efa7d10d561943f8d3f26637c3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92314ef7-c9e0-4fb7-828a-54c0796f212a.json and https://artists.proofprofile.net/proofs/artist/92314ef7-c9e0-4fb7-828a-54c0796f212a.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 0x1e45728cd29acad48ed66e7681b01493ba54318f8cc14a6835c157cf522794f0. 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/GBWUL2121674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5464432511832296b4b628d98d3d17d109e66f4dbb04ad6e4bf7acea0e394f85. 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/CALVP2098815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53015ea59de9eb6c0a193da855ab97df79ba772b6563cefcd8a48265cb4dbde9. 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/CAGOO1943103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f246d0123242508ae537501b37aee7b13f791f346b654442e7dab362a50178. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBWUL2122020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb17a0dcd5c19cd719eadde0a749044069aff6aa81bd44d90819aca09c09a4a. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T16:16:10Z), 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/GBWUL2122065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c81ede398d4de43fde6cd6e6ca616718a6677a1c70b3ccea08804cb5e967f33. 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/GBWUL2122069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2db3f38d46a9846228748db2831bf27ff44f76ea5f8027a949f559b1a12c775. 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/CAGOO2082360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7de9485e140ac480b8a3a426b41680caf2ae1ac224bfde3a77c4afc7ac12e0. 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/GBWUL2122075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672d167cada3709968c01d80c1e0e6abc2cd01459be6ccc800b4a9acbf010a87. 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/GBSMU5980537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cc13794d89a4decb4820678107c7c11501ac1d9d46ff4cd4518c7cb11acbc5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBWUL2485941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056ac9c05ce9875c0dc49c7bfa5c48091bc3cd7575c50805402924d64d127d7d. 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/QZWDE2309122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056ac9c05ce9875c0dc49c7bfa5c48091bc3cd7575c50805402924d64d127d7d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZWDE2309122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f246d0123242508ae537501b37aee7b13f791f346b654442e7dab362a50178. 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/GBWUL2122020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2db3f38d46a9846228748db2831bf27ff44f76ea5f8027a949f559b1a12c775. 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/CAGOO2082360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5464432511832296b4b628d98d3d17d109e66f4dbb04ad6e4bf7acea0e394f85. 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/CALVP2098815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53015ea59de9eb6c0a193da855ab97df79ba772b6563cefcd8a48265cb4dbde9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CAGOO1943103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672d167cada3709968c01d80c1e0e6abc2cd01459be6ccc800b4a9acbf010a87. 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/GBSMU5980537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148a7bc51b00029ae50e6bf6481b5f4a28caaa06e6644044e3fd9f804cf850ca. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CACWV1815219.