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 0xeacc10e38b6013c7f083537173ecb3abf8a668798a5fd3aac75f52de08badb72. 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/3b8e2d5e-6eaa-4cb3-9a35-eb35c28dc247.json and https://artists.proofprofile.net/proofs/artist/3b8e2d5e-6eaa-4cb3-9a35-eb35c28dc247.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 0xb8b9a88146021afc0bd27668393c8e3f606b50dbd2abcf50832ae31c572a44f0. 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/DGA072211630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5ce1d0e97f48da729df7cf72b8e4a335336e1e509279ffa009666d5f8d0789. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA072211631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61484f83e4094385cb50a0d419655b861c63fce6dbce438523eddfb525180c52. 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/DGA072211632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191c3c360cbffe2c70d046ab38396890fef08f4b3c3ca323cff7c3abae49d486. 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/DGA072211633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf26452049c83492cc588f7bcdf81b6537fd2f42419c74064835219d186f33f9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DGA072211634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30673dc8deb49f64201b596fb426e7e54c60904846282f5ebfe758072333030. 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/DGA072211635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b014a1b9c70029e817ce33f705a21c13e044a2140d05572623d8aeb2af961c. 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/DGA072211636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3385e813de7afb5923d9c048f6925ff5d4ede84845e0edb71ca2fcc45708855. 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/DGA072211637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fc05ac1658e4cad58f13b7c43451a96a335ca34e0cdef12a268b5d2fbeb0ea. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DGA072211638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa62757da348922e3a4b13944123f570ce2c95d710d0ad9decbc5d209af09b34. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DGA072211639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba72a1cb417c2cbc574525168ca32bc117a2eb608a7e32d5688da654dab0d4c. 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/DGA082338186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff7978b122c00dcdca44a9ec85ebcccb72fb2173fdc494267a0d16b424ba5d4. 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/FR59R2209272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251a952317011f723961d816694bd9aa48b4eb4b1ede4714874cd3aad5d9fe8d. 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/FR96X2230496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d229056155350f8194325603fa91289f627b420df5e2ae7416a587e329fa1f0. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR59R2209266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d82d46f703ec05454e99d4f730c0edc17b7170be14f1205e7ae2a647ff67fd. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FR59R2209268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afa69940e910d0a576f779c1bfde501b1e9fc7f636740a0cc791d75d09c1aad. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZMEN2341812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20198e0ad679c9bbff5b51088544348339ed5c0cdf47f00d91a4e7f504579dde. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZMEN2341814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b49691154ee61ad2344ff1b190da4f6b0afa67efb8094eae9c96a960bda8261. 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/QZMEN2341816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf205e8894d024924892e8fb37575c70daf261f14f9f0229a16e52bc7c57b3707. 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/FRX872116500.