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 0x9ccdbd248e098b1f5c281add4578f136c4f4791cd467f1652588a1d4fbea1587. 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/afd8f969-c342-4339-88a6-35446e6c53b9.json and https://artists.proofprofile.net/proofs/artist/afd8f969-c342-4339-88a6-35446e6c53b9.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 0xf1b754b4760af8e8aa0ca3f774653312e5bee861199f062f138dd716c00c7d8d. 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/HUA761100192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fc6a52102e0f2a3256cb93d37239cb56b0a604caf43b706ce38d52e882ead2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HUA611402305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416e246022051039019839359fc1115ac2020adaca85eff4d2d780d5c1380948. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HUA611402306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9afa2ba6f6f92455fbd82b8924efa6e70457ade7973bac816ae5c73ca0fe6e. 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/HUA611402307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bb212bb4aa0c57ab5143fb45caf74eba03712f765ac32c0eef76ed497e3515. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/HUAHC1600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a9f0d06d03c8af88533116de8a168a6a3bd5aed13309fcc3d3846c2097a4cd. 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/HUAHC1600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ab84b4b29bde74a817caa7ff33b4aa1faad884013db6f33f3dbd5c0e32ccc5. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/HUAHC1600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0dd19aa8b1b0bf57f26ee1d5d18c2320120fcd1529c708c647761f91b63848. 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/HUAHC1600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4a473356b4681e856506eff399545af5640f1424a6f775539d4100dd48490d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/HUAHC1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4f02c47c686205db6d88ed170192b93380b20f0df63e992d7cf425d7f92e93. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/HUAHC1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb187952ae83409a78213422080b40a7721a2bce5727cce4f01852a845e5ee84. 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/HUAHC1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378bba2d482a6a0d96d2a9224e7133698d38dfd72275d31f7dab19343d62b3f5. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/HUAHC2000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb087fde4075267c200ba47912dc1fb1a9a222de011dc49e38fd73663abad1cbf. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/HUAHC2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f36e3a38458ec3025d06f62de54d3fad24bf74e2763926f394820add3ddcea3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HUAHC2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc17d201f03e02e32f9a2030be830912cd68dda9be19d3a7a358f3eefae56ea. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/HUAHC2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab685661ca0fcba5ba66fa6a2a80fd7a58e05f61c8e40a63dc4bff4e62cdd89. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HUAHC2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013e0743f1816c0681106e2feb1d5d23a235f010b256da8d4c7abe605b5af7b2. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/HUAHC2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cd664be360a8dcf7087ec2bd64beea83d70fb11e133243c1bb41625e038994. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/HUAHC2500025.