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 0xd279bae6b4bb18667cf83795a0b40942cb2be2a219130c0c4afba2db6b14d739. 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/377c6eeb-a5d7-4882-a2ef-f75c7046344c.json and https://artists.proofprofile.net/proofs/artist/377c6eeb-a5d7-4882-a2ef-f75c7046344c.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 0x0dec9744cceb857f29578aa276318b58618cdea054e2a5d9b5e6b5d486ee2abf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6QE2140077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5088cb3f5a300ad751513acef8ce49d0e7ccf255f27c9aa69a94e16cc79ce375. 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/SE6I32233352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f03c33d1d2779c48e2e94b1a1f5157efc66b432157323fceaa92eb5c6efea4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:01:33Z), 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/QM4TX2374810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4190cc9f9344867386f257bb16f1db9f03bd5f3d0e453d64d9c88773330db88. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE6TI2339488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5611d3bafffb0dec6770152927306ff71dd3805dab05050ba959346aa00d72ec. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:07:36Z), 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/SE5752497682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386a2a5ad7e16553df55df1698e5db2690ea588460698efe67435079c2a2c8a6. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/SE6HN2478615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eae5d36e4411043e8ffb7233a6c062043d1bc65c6b2a3b5881c6c20bcd19ab9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SE6HN2478617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031a3dfe1096674cca84095c09518ed561a2be141a760de340c303323588561e. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/SE6HN2478618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625c5cccfd4fe686ae7a4399704f7324722a3fb00926863d9b8e756052dcf89c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:37:10Z), 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/SE6XW2415863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8054ee3593adf6df9c5ad8dc1165b0ba88aca8feb68b0f3b9f6c54ba3690d541. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5BU2568868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5088cb3f5a300ad751513acef8ce49d0e7ccf255f27c9aa69a94e16cc79ce375. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE6I32233352.