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 0xac4ed113904f877c220fce62077f5446b1c54f923a06c41c48c61db1b62a11ae. 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/259af8dc-32e7-4e8f-ba6d-c425df8f9636.json and https://artists.proofprofile.net/proofs/artist/259af8dc-32e7-4e8f-ba6d-c425df8f9636.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 0x0ab7bcfd56afaf8b65a694e61ec9779091c015af8889a3b25030af935582f5a7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR29U0700160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8750aa6b71f93e47899dca761a90e1803b1645dbfc1c55e0583da35b2879dbe7. 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/FRX762125253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2eca464a83f18557da9c30875ea8e34d52ad272bdc3b756c8879242198f66b. 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/FXR142200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca07d7fc650f8d438801195e81dd3df4eef445d7b1bd6e6177ebc8ff068b070f. 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/FXR142200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2eca464a83f18557da9c30875ea8e34d52ad272bdc3b756c8879242198f66b. 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/FXR142200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca07d7fc650f8d438801195e81dd3df4eef445d7b1bd6e6177ebc8ff068b070f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FXR142200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477c4d643b5f308c95265f86aec85ef5b535684578fd6604bf5bd86b9cdabd31. 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/FXR142300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5699907bcd15a8fcda5a8f8734b4b78cf8102eaee09846a93f6930050f23f9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FXR142300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc23d4a9bae660c991eaae4bc8a944484ef614d8accf21fa5f9fa3feb9637e2c. 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/FXR142400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f2ba7809a3809f49f8e48e6660faf108e9dce48e2deba2620d26a5229bffd0. 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/FXR142400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eab385994ba64bc6f2fac6c3cbd82f1f8d46e411f8aaad1b4a90e43f9a65a46. 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/FXR142400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591b891264ebd7e9fd64e51652beebfaafc3d3eae0c98d4484f2430b5f08447c. 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/FXR142400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b55c77d21394a291581d62fb505a37c8c091614070d3bba2c77af206b4d480c. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FXR142400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047acc55eed16139cc3b0ad3af91ee5e97921f674feaa5b4f9a69d9d059c4ff4. 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/FR9W12555561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2a5eaaed3a3ad371e4196ba897f32781aff14a4b90d3c6a43fb4c05f398a6d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEBL60950470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b60ddfe900b493f33b45bd45e51e430e5f2f08feada844ecd4bdaa2ba7d2fb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR0Z50001480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60754851219d3273ab62e108cf321892f6adbc7c1d1da92abde0ab32a9e38b64. 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/FXR142300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d43da92e4db829a17e2f3f30d70db10d52f262fbe06ed02018c7b1e4b217c83. 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/FR9W12104105.