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 0x6b14d5f0dacdffedc802c15c0f4dd6e39b768a821a25a7d97e11ad84d999da18. 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/fb69c740-decf-4ba4-b933-ff02db10a47f.json and https://artists.proofprofile.net/proofs/artist/fb69c740-decf-4ba4-b933-ff02db10a47f.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 0xb44ff0259af4d18176c6939ac81b3923fb4ba57efba3fa88e6ee3e5cf084758a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIQ2462155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0746689e25cc8318a30a38c993ff6de72515b8530b09e07e10c8a9e2c70ab688. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:47:47Z), 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/TCAIP2462162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce678330bf5c74dc009c210be01741aa5193125cf7363d627b3cd3bd019f1be. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIQ2462165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9b58a515313bb0f576617e19543ece973b1760a7ddb1178dcb57d7f113e78e. 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/TCAIP2461551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794ecc6c006546c4beeadf11193f218987293eb1cda05541470934e38f1871b8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:11:09Z), 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/TCAIP2461555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3374e4c88dc03ffbe8d3165f4f0c63db1f37984ceccdab75ce41229e21f33de6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAJG2533945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ce027bbc1cfef4fc7e023bf44bcf0b0fd4647472253ba0a655fd368c95f6e6. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAJI2513187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da2f51e9c9bee3f395e92e359c9016da0e6e5f76fad211dbe3688ca7bfd2a2b. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAJI2559482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb730d3a9591a2128b8d8a6ead4f16fc84e0965bfd7eb0e4a174a3328c9ce6f2a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJL2528914.