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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7f9df6958b2f3e2746e917cc6f5d6ee37200de52c0636c70780461f408a812. 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/fd6e357e-8628-4c66-a350-ddd4eabd135f.json and https://artists.proofprofile.net/proofs/artist/fd6e357e-8628-4c66-a350-ddd4eabd135f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6168565909f2427ebf3093858314a6c960c8aa52574431566c7770d4fa2362cf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWZ2320057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa52418fa890ca1c41c241eb14ca5a57745342e56e45389cdae657658bcda3a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNC2068686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560bb590fab22a1f185218ba2dc4635bddc973208e46e194e2cc11864ebed7fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBWUL1806174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e22f43e64bf3ec904369bf7e48cf85a433edec372ada325e76a6a338ef08888. 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/GBWUL1806175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4d56f47db3212ba2edc9afa8e585fa2098ecb9a1222a0701b9aa2a0b7bc525. 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/GBWUL1810186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea330787686831cf67bc1fae3b485c1ad34cfb688ce9a256733f3241c86d2ca. 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/QM4TX2056789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93501e5b3fd0a594f2c5d23ab83958db564faecfd449396b579250b9c015fe63. 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/QM4TX2056790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fbed9065d292cdd5bc57f1398b45f4d465e0ca3cd2272fdf8a4e8b26a3bf84. 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/QM4TX2056791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e5c351461fa58b2211c2d4a68754831d9ba06d8ab57cd12ca39806388cdc36. 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/QM4TX2056792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e1d7caa484b866958745d3e4a69e3a5af9d9f212e597a4874cd9e8ace64772. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2056793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942e1c250977fa73aa2c03e1f8b7a8df2d05ffb9e7845da5593e18a16ec36fbb. 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/QM4TX2056794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86277f310d09830a13d83e051c08a0a2505e613828bbb27266873c451b83fbf8. 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/QM4TX2056795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66a32b6e97af842ca883066ae98d72fdc81f526a4914a4a97678792f481d80c. 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/QM4TX2056796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fce1a0e16bd9d2e1a02d400fdabbe0cb9196e48055380914b8a2df4fda23bfe. 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/QM4TX2056797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef217d0447b844b343eb8ad6f33ddb03bd654fc201a136fedf3b7e8e87adef7. 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/QM4TX2056798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab617f4fee63ed1379163c34b78cea38ee4afc2c300cc281bc2b9a091c72778. 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/QM4TX2056799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2939a5dd9e8179137bc4563d6a9324197d7cd9692ddbbfef0243d86c1a137f9f. 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/QM4TX2056800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e855bea79f6e97f8b604f8c33376d53c01618239cf11a33bff0faca7505f07. 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/QM4TX2056804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13299dfaecba3096b18b30fd4fe3052addb102092fb70c70d37409296a5a3226. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM4TX2056806.