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 0x571c2ecda1fd832c775bb80d25d431c50aa316e7bbb3d7a6935d6ab3e869c82d. 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/9e17538c-7237-4fa6-9dca-2a01570b68d2.json and https://artists.proofprofile.net/proofs/artist/9e17538c-7237-4fa6-9dca-2a01570b68d2.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 0xc49a47c7a6f1783175f5a892590d41ae3ebff6496e3211b6573dfa403982525b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTVM2434849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ef46d3af27eaffc650ff238dfdc316fcc0649ab0029a36ecf6c46cd12aa530. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTVM2434867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f3caaf2ba7c52225ff3259976ddd0660f950c6ac28d4762318189813ef9301. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTVM2434030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781d4fc112032b5b6b550eb2f4f725492188772a9ec274104b5dcd4c70b00fd9. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTVM2434943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bea64a00642c4329a8bda298094f4abe66f23641c73d79dbbe91dabdce7285e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTVM2434032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef8817e3b368451a99e4c8e287a048895bc18ec0ba97e60427a3a8302413a0f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTVM2434276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e988eb084e8840e7e7af1c49b8b432d71c1a99166446e59dd250654e362919. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTVM2434158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b834a85f4bfd6999674b5bb304f47f203574595a1b45fe0f4b52a31f93797e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTVM2434893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa309575913e4bcdfda27cf23d288ca7b7d365b3f28c4660127ecd8f44166d017. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTVM2434020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6481b0e80f032451051fcee495e622160a6a13f37d2a4fe849df4b34b6cb3cab. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTVM2434124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1ed64d9b6ea8853a06bba99ef9ac31b73b9b8e573bf9fc7b40f0311ca98a17. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTVM2434031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f57c1323d096c94241b32c10ab27ddb63718ade309b7456f9f1fdd47211abf6. 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/QZTVM2434900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf55d09fbd73a08e19764d9a276a3fe2859fa0b895cebf0b5f3efbd811c19b02. 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/QZTVM2434130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92a27adf9782e55982540a17abe33026bdf1a02d2bfcc00c9ff98d2dd4d7017. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTVM2434846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710744e7fcb87719095a947062fc4e43b890da46922d20a22c2c4cde77bcd3c8. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTVM2434150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ef2a8a532f4bf8f8bef2d02fa824ffccc686fce82ed22983713d861058eb60. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTVM2434271.