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 0x25a207aa35cfcde9791bd8ee1478bc0291892ff95ff865f940d805358fd72c76. 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/4b14f1c5-53e1-4d64-a9a5-6d77750970c4.json and https://artists.proofprofile.net/proofs/artist/4b14f1c5-53e1-4d64-a9a5-6d77750970c4.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 0x8918202f370b2f855c8a87bd08ba8825d3322e241007d3aeb5c306c925bcfd22. 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/QZDA52471176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0c8f08d924f7f7ae83c25c30906a95febb2972a06c05c91cdf13b2fe69c937. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDA52471177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ee07c53ff270d9253fdd054a9cda9a54098c4dad67ab837e5e26541e1bf2d2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA52471178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5083c2ae6cfd0b184c69b192e5421fa31c9d63e1c8bf526ad7b7214b72f1b60b. 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/QZDA52471181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d309cc066c426f1ecfdde0f45bc2cab293c038c3391688697ce206b4708ffe2. 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/QZDA52471184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a038e70b7989a288d8a0e7072934e25a9a943fc474777e4a73cabc18e20e3a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:34:43Z), 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/QZHN92435973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0a711448f4329e00c3e33004ec6952b394415a6f260aecab4f7d406171ed3b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN92459375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8668d40a33712159641b0d0feeb98157567c49a5b35ad0c5871438c42a893f3d. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZHN92459377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fb3220492d1c80beccc6765298c9f4c0bb858ee6b5ff023ed763c8c7c19f5c. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZMER2458498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22bf9e792cf115432b17c0d9b009b3836c738d520013b94c3bd4483022a8fc5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBA2494305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c71cacd38984e20cd78ca4b085f6e0129c75bfea33e0125f9ee178ccbead7f. 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/QZTBA2492430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7a8a0ef7ccedbd3868ce187e15c42422d8f27f1d12455e7f852a5166689015. 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/QZTBA2494295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3ad9066c4684b0f77e55b7d0b82d643235fa4b4c61cf384ed77f3376476e99. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZWFS2466922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b70d05bdc0aaa37befb95a165a39380fa4ac187f142c3cb9df56fb3b679632. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:58:37Z), 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/QZK6P2542040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a9b022aa520c6c86d5944338fda1d69aa32ff1c769b51e3536c33d1838c924. 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/QZTB22589395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351322a1c7478beaca16d4c4dd848e1a815390a5be860e0d1444e621e8d05f0c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB22589396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc4f78f79a3fe980a3be89c39128304c58429d245a5b24757133070410843f7. 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/QZTB22589397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493c4fae990a91d2b9884b546c9d8423c49b316d6df5a07ed390a007e63eda5c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB22589398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9371b102fc4fd95ce70a68a9c91e56f72791f90528b801d4d6925a1db5122ba9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:50:28Z), 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/QZTB22589399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f19d5d483e88a813c1088375a369e90a56eb37ce93b8fec6f68da9239246be. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:39Z), 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/QZTB22589400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fc92036d56b583115cd6f15fcd58134464f25c257a3af55cec6210aff6f7cd. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:46:53Z), 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/QZTB22589401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e865fbdab214f9ad397dec53347df29075b8edeb1b8c858e24b24ef865a621. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:31:59Z), 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/QZTB22589402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccb3b4218c1e30c3083103716f1ea1a2c3084711daed2c81e2a7c6fae9862e8. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:19:42Z), 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/QZTB22589403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b81873d1be380df6df997e62e831bc476ed79e4baa279b082da084c431a84d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTB22589404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0be184f092d045691aa0e0e0f0873dd2888b3354ebe4fa7d8617d7d85267ea. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:53:37Z), 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/QZTB22589405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f047ac19562e82370ab8da7ae2071308eb648e7e35c62b93a5f102f6c15103. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB22589406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fbde9fef9948e15517e83d173f00c3c05a4cb1e31d416449a7505080daca0f. 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/QT3F42501678.