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 0xd76a92f3c8ba170ba3838817cc11d3179d7e6c50e43b7c18ab2129f87238fc7b. 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/db318b6d-c535-4fd6-9ae6-b82c2bfe4b0a.json and https://artists.proofprofile.net/proofs/artist/db318b6d-c535-4fd6-9ae6-b82c2bfe4b0a.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 0xf466a0ced8a8f875fc9cdea4bc0c5ca8e64c79ab4a45e1c1d726c03a1f8701e0. 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/QZDA71946690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc73dae95651c9e2ae58942b204333ccbaaac15a58eab55063dc2985152f730. 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/QZDA71946691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f1b54cf4b4000c64454493c740a590402ea61ddec3468d697a2bd572a38e84. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA71946692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0108e65e64aa90d6115a64e57d05be05674faa1656929a9e6e04acecf25c140d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA71946693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52a2157492c8538d7e3274ed29d960ba62422483c4a20e803de2b6138d38169. 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/QZDA71946694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d1d53c16c1a7c70eb3e8f17a2bf6ddc837f0773977f222e7a1dead10b2d718. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN62488839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f02b9a2f3f477001a4a270aaf1e316840a9afacd9daa48d8b801acf44fc17b. 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/QZFZ62340786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa177d4e4f10acfe253ced53f24b5443112e0fd1e5ec77c41965e9bbf3e6abdf4. 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/DED832100879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f1b54cf4b4000c64454493c740a590402ea61ddec3468d697a2bd572a38e84. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA71946692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a369bd7444b32272b9193f36dd1dcffde2bf046cc93506ea0ab4257b6a6613b. 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/QZES51862905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225f42815ea81f780bde558b927dc34a1abb31653878e8c2aa8a9654753a6136. 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/TCACU1651787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b8eb80cd01640b1287ffd0e14771cc532c4ef2eae8a600bcb13c440351ac9a. 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/TCADN1847025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204b0b5d8dec710bb763de91bede96fe21f0000370b90deffe6383531aebf5ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN61943811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dd1267ddecd62c1878124579c812dcee59e9769b2544aed84c5dc0aefcedaa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKUVV2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d823873caa44fa94442bb066840829b7e70944ef7a4914a8c739d162f15a8e. 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/QZHN31958975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a659184ef97a59ede87c6cd82f45df9fa4d22b441960ced74c76aa6ebd77b0. 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/TCACN1682914.