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 0x76cfb00d4e13dd14829b342175f33a10db318b6ceb13bd2a115e5b8caa308267. 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/a350f014-77a7-4548-a93f-389faf19cc69.json and https://artists.proofprofile.net/proofs/artist/a350f014-77a7-4548-a93f-389faf19cc69.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 0x56af7e1df5299803b34a730a635b141446d1b08a9c7a27d89c43a2073f09dcaf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BEZ259208102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96a0f279c2373f7cb0cd403c1470587522468419d4ad2c5e762cd04767995f3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BEZ259409105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368af75c0612c273e2679d3b479cc8d6be5037d4694a40cc3e4bf2ba223b6920. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:39:01Z), 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/BEZ259409106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc918af37c336ce48eb025406678904cff9502311de5e0e8d9c2279633cfb40. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:24Z), 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/BEZ259409113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda75487aeab716b9153cc0db3f5f67f21fdba7cfad4d23798373c870815b161. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:30:32Z), 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/BEY780100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f486d5c3e6680d8c08741f7c9c77289d97a0b33f90049ed002b55dfaabdd148. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BEY780500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa655f2c56ee09cf33dacf6e618c4f5286795354118ff827219444512d1b84759. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BEZ250913802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccd5272d143dc131910d24b4d4a689a1a265e58bbb39bab512dae5b88cd868d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BEZ250913804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3f07c81ebe2bc97e5c7e0c96f4fe5c3fbaf6f5322b828782d106b3eec6756a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:09Z), 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/BEZ250913807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f41a8afd29cd0dae4c89a00a0c1f33abc18895b0829e2aef5cbe057205a446c. 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/BEZ250913822.