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 0x1170869fab9ed7da6c5e495384e56975f80fcf2863e978e3184d1bb25d04f72e. 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/2992dfe7-4b10-4139-984c-5437d960d25a.json and https://artists.proofprofile.net/proofs/artist/2992dfe7-4b10-4139-984c-5437d960d25a.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 0xd0351dbf2047a7814584671a5661f0bafe33602a4cc63750e7cd339186293286. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/DEPI82448218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a49674996ee81b19188cd045a66666d6a792cab92cde42a95181bb1c04b36e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:41:19Z), 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/DEPI82448406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635b7f5f0d082bc2e6fc9cf220fb3dbb6f1a069518e70c17fa579f47502a574a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEPI82448401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad5a492d984fbb50929628932cd4e3ea3fad654a9e4cbe6accfe00897f433d5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEPI82448402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518ced8947c5a27fbbbe66ee60f82b323f2ab8632dd581b1eab7e07d09d7a223. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEPI82448962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba903b2f9a5be68bedce6394dc49232fe03763c6538383d4f79cc86178cf9bd6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEPI82448966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f29ce2206b9eab89337d94c904f71d1d9b63e32ce459ce249356165a4d9199a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEPI82448963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518469123d7e1a3d70892b7638e7425e17408f16d3fdf56e9333c36ffcea9f85. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEPI82449173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979a5f85400967cce7a4e08b55c61ec567a8a4cdf51c19a5de79794e17304425. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEPI82449175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142c8e58650c7ccdb97f797575b5d95ecbf00708ef7eb773b9e1adcd36cc70ab. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEPI82449223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e437e158d5da04c5522be18e75dfc70d891cbfac648aee62a04608e160d651a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEPI82449215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919345418e82f33013847eba5a20da1c38d29b6d90b9b2db572d8a728ed6e2b1. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEPI82449221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e140dcccfd21069fccc1aeaa967a06c4ffe6e59be3c675c31128ce71fb2118. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:37:22Z), 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/DEPI82449226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3496c2d8b9c29b7f07cff4e2823f11bf96fce42e831d45ad455d846c797bdc68. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEPI82449224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc5ec3a79e0df44173d00b7b6bd92b4df43ce91077d41a935b052a23a6ee8e2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEPI82450256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222cde6b3a215d35ae2846a2a1ca6faf224477124ad1d83a16ebf8fac97125b0. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEPI82450255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9263b013318f32a9bb230a5f67e0cc1bf81285d70af6d126cd850060f9264dc3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:53:06Z), 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/DEPI82450259.