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 0xac7e06ca85ec04b328229d7395e304fc993f27b89a4e44bb470f47ff3e9dc1d6. 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/72ab12c5-15db-48e0-a5ef-2c50e4bfb2c7.json and https://artists.proofprofile.net/proofs/artist/72ab12c5-15db-48e0-a5ef-2c50e4bfb2c7.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 0xe6ffc0042f17521887d91cfe547cd4d8ae9b6653505e96e061994a47dde3f94c. 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/DEYT72200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c60ab7bd74b9f6b30d892fad8a70299faef6b76c05605021c2caa16af142c69. 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/DEYT72200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad0b6d6a997aa317db0cf5646604efb724cbf0d78369b69443857bf6904b3fd. 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/DEYT72100554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41558ff9d58be2790990d8e071eb3bb2d604e7aa3a3f8c5f495ee7bdc794dc9. 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/DEYT72100484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975a52573c5bd08662ebf9662403e6bf09b09cd1ebcd692e4004e474be8fc2aa. 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/DEYT72100459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c821505a91692932b7175354b148ec1fcbabe5e81feff99eb3ee3aa2a9effc. 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/DEYT72100396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71424631e045698e267518b929e42ad0ac2c662142fa009d701a0019b43c272e. 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/DEYT72000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb83ce3212b07d754e519cb2e00693d3bd8dab75886951cfd7f3d45447d2065a. 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/DEYT72000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edbd8cae24ff913ef3d0f9d97fb087e5ae19328d1447b2e6c7b7b446b273a96. 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/DEYT72000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9794f4a8272f9850cd2df9eb2c89e856753e04db6a6913255e10cbb70d548c4. 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/DEYT72000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a255b5dfcc764b040e40a40803f1debc97595bed471a521c29f70a8603e2140. 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/DEYT72000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72228a8e00decb03adc437f5693ad677683c7aff3bdc027df51f9836d7a768b. 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/DEAX11901006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e0c3e0724cfe720bc45b120580a14c2e076ec6cefcf19e17f421266ce8825b. 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/DEAX11901004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3894e7656e6efbd5b65828c434d40ebb6fe669d017cc40bc524a511ffd305c38. 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/DEAX11801005.