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 0xdb167d81c649b2178717c37c44af8b0b810132e5e9dc19c209417d8414af016f. Chain 2 (Bitcoin): anchored in block 953939 (2026-06-16T11:40:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20bd3507-b56c-4666-b863-49300067a11b.json and https://artists.proofprofile.net/proofs/artist/20bd3507-b56c-4666-b863-49300067a11b.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 0x15abe22b48f3bd79899e091c43c92d19cb050e47aed52d57f5cc5f0450f32408. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTAY2530803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b77e0513d336618bc922951430ce6c66e4bfba6a6b47a06da0778b66bdfa451. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTAY2533220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba87dfdb028c92afecebadf60e88f21bd2ea617afe92c3777db5ce0990203c0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:00:46Z), 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/QZTAY2555965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b8bb528d9a3911ce037571d690914ed87e986a2cf425bdb3e03d16606c4d6a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTAY2568725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa05e83a8c5fdd0740d9e5bab9ac822617b01024f146498d0ab8b22ded2209ad. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAZ2501407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b0618054f56938497eddbbd64de8bbd71145288eaabf9282fd72c6dfb29f38. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAY2584185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1a2e585d0577bcec3a42848b04840855552c1c73866efd006175c7728a3e13. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTAZ2512846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614196bcf23a1e07a6553a69f2891609150b4e51053de1b2932845653d4777a3. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTAZ2521834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459f06ff8388aa83ea29f2b48eb5f786fac07cbd38abbc4c6afb7f16489e460e. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZTB32530596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e357b871bba78f71516dd7b2d4c59a5d280613156c0fa06705fe0fb2229c22e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB32553236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2733b51d446dd2dab19bcb3761613e2016c90d13de914dcde0237291057242a5. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB32594964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729c5231fa7f34f1632647d2cbb3093e7b376748c9fc88b06ec943c372ec97bf. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZTB62545691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbd5c426db1993e0344e311ee1ee8460a7908f52c9b76f6b59e056b900cba33. 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/QZTB62560189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c26e29a887c39b5f5d467731c76d59276ad0e904e7bdbbd2fb5afea5a467e8. 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/QZTB62517571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb551d2213a59b2b2d647f4db9075a18c240bb6b8f803f39b64cfb29acfd86500. 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/QZTB62587192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4543c10b511c8197bbf3af9d30ab4fd76bd8b0e923549ce1bcce1c4cfb035aa1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:31:29Z), 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/QZTB62562150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9f7bb6229f57b88b87390ec5c4e5137f938e17baf25d6097c16894fa04aaf8. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:46:50Z), 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/QZTB72506794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee70de7c222351a817f6434e147a4da22b90cd55244afadb26b69b3f3385626. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB72590147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a36155bafdbfa09d493966167a3e8692e01abd847f55e96b1b107ca8227adf5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTB72551595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb41a639e5124f0d4a581beb073308c1c4c037e65d313e98b69f0dd5c4cef863. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB72590141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013e7654a0bd5b4eeec86d3cfecbaecb7cba18a69be80aacd04821983ec45891. 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/QZTB82532635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c897e15e2d330ede67346bb56386c1590c127b54096ddd477683aa57e1dfea. 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/QZSYP2108004.