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 0xea2eea9e144e08a92cd275a71b02b085ecedef1c35537a125b306e13c457afa0. 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/db6c8eeb-6608-4d20-96aa-a615f9558bfb.json and https://artists.proofprofile.net/proofs/artist/db6c8eeb-6608-4d20-96aa-a615f9558bfb.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 0x2551e091854ca3d46f5ba6e67f01d802325f9d7dffb5b5ae35947881d3a25be3. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTAU2526572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f2494b9a399012ac079b3cf1bd23ed0aa292199a3a7094fb14bbe0f687c3cf. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTB32578503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff46ca53cea941ca32d631a81e8a71151d09d750d54243cc492ec5531bad4158. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZNWX2511156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cb9bf5a6c10b6ef3dcb40f8c78641ab2a61eff18f247804e6e9ecd84554046. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFT2581437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569683c60dc05d8a50f121142a60f5867baf271be35adadf28b30b2c213a3067. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZES82579886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da1ce30819e5e253481a696d8643c9992ff0240f36efbd8ab977d8640693ebf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ792550966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569683c60dc05d8a50f121142a60f5867baf271be35adadf28b30b2c213a3067. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZES82579886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b38e3f7bcfcb382c2061e77a803ca4447ac89a73b2b9093f842a43ebac20df5. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZZ7M2560138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cb9bf5a6c10b6ef3dcb40f8c78641ab2a61eff18f247804e6e9ecd84554046. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWFT2581437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a54f108a85bd97688dd7236a775cff5301117de4e0954e09cd2a6cf051c1a06. 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/QZWFX2549009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569683c60dc05d8a50f121142a60f5867baf271be35adadf28b30b2c213a3067. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZES82579886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da1ce30819e5e253481a696d8643c9992ff0240f36efbd8ab977d8640693ebf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ792550966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b38e3f7bcfcb382c2061e77a803ca4447ac89a73b2b9093f842a43ebac20df5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7M2560138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cb9bf5a6c10b6ef3dcb40f8c78641ab2a61eff18f247804e6e9ecd84554046. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFT2581437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569683c60dc05d8a50f121142a60f5867baf271be35adadf28b30b2c213a3067. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZES82579886.