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 0x4255bc612c2257328be2e4bc00f205ede26980dd2ac3577a3f49b2a8856dd3ed. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0b2de66-2a11-4160-a7bd-37cc483e3d9f.json and https://artists.proofprofile.net/proofs/artist/b0b2de66-2a11-4160-a7bd-37cc483e3d9f.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 0x96e61e3750c56428c0dbda6b3cc5f864b09d410daed279663d0fcb5e3f220f98. 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/CA5KR2355508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf77b06fe0460f9c0c4bf6ea50bd649673369989bfd038d284acb45c77374ae2. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/CA5KR2417301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe333d9e11708b6c580ad7632055035dc0c45c21a217180a0de9a2111836eae4d. 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/CA5KR2417341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee57eff796be2167c5372519d0bcac462d1d9336a1d9681daa09191f18bdb3a. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CA5KR2498202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa550fc6c461bd290acc3fb40daa68c7fb816c0a72aecd6c6ca0ed9c8a040f4ef. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR2498203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a012fc11d64dde4aa1ddee3db3fd197a5583a69c1b1154967c849aaadabc37. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLM7H2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282de06a095e06bd8fdac11dee2b5cea864c31a6310b6f125ac1500f111bee70. 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/CA5KR2506536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d59122c28557bee0d5711eb695ae3d683b5360dd321d7c4d3fad145d13d79d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKU932290058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812e54ea8989624eb41d6369c1c785a7dd45209d4c07813b18063c4fcea69d4d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB3ZM2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282de06a095e06bd8fdac11dee2b5cea864c31a6310b6f125ac1500f111bee70. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:52:55Z), 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/CA5KR2506536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd72e82d0f062d36acdd092ebd287e3206fabad51361a8ced0bc94c1c0f2dcd3. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBVPL2300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86ff1db0d7bc81eb6ac50ec5795cfa0d9b09bd3a2f73240ce28d6944de8935a. 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/CA5KR2500537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae35fbe8d3969853c5e4a14b3c3841c34cbd89268201c70abaf36456105f6124. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2510365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b381d230cd9e9e622983ba4e3ae4b07f64e283156ae0f628bb0e79a9190793. 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/CA5KR2264994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a012fc11d64dde4aa1ddee3db3fd197a5583a69c1b1154967c849aaadabc37. 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/NLM7H2400034.