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 0x637bb5ff2c7700f6161617f7f6b65ebccb8d428453b64f4acf379648c98d7364. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a8e7a5a-5671-4467-a370-e66b5474d4a3.json and https://artists.proofprofile.net/proofs/artist/7a8e7a5a-5671-4467-a370-e66b5474d4a3.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 0xeb00be1bf4df6ca6b03c41cde6c83d8e7a67dce4f8407d3461c526b4b0d2e315. 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/QZZ7R2567070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaf48c4edfacf1fdf686d6c6c581bc83d99807ddab4780822ffc97db09a7b4d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7R2567072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93836e35e2ce157f15a45132d0082d20c7e778aaf90162c79d6f7d7d47253c19. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZZ7R2567073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3791914edf797fab32b359c43b18e67bdd070e9288574cde96cfa84b5678181. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZZ7R2567075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bef01eee99e0f7464e644bb181536d4ab4e7aecfae41ccc951a78c7d2001b59. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:41:08Z), 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/QZZ7V2508140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e498a130f9c91c83dd8f8660e4c678deb6f2f7a638955c5ec96987f1f93106. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZZ7W2544517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5d1ed29e0277c8fdd0333eaf140efd565d955ace0e236859b227266d55f3a9. 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/QZZ7W2555101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda96eec572a6a89e4ba0e150ee54a6e50d1e008acd1184e1ead700c671299615. 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/QT3EY2523374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5a8f233643ff545a725d03cfd54aa96b957d721c7181ba5eb451af971495f5. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT3EY2523375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f78b88d5971509f3ae4d444010fa6d0fa8254a938e9ce910fe893176b893ed. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3EY2523378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4590a399abd041a80a418b200417908fe54172623212996a3eeaf17039596e39. 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/QT3EY2523383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f58f24205c354d896ac5d172f7bdf1ba2901ee95a07b1be75544c25873b20ae. 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/QT3EY2523384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc624df5f769b21dc39804d9aa7c785cb1e0316c93476663f91656e209487414. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:17:23Z), 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/QT3EY2523386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1f496476daf9a95e6a378b6a87f96f4fe2fa3d51434eea511373aefb92e7dc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:26:41Z), 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/QT3EY2523387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87831e144a53c4c71c7006ff0ebcb3a4f578cb0f5d35853596064c3380bb430a. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:14:31Z), 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/QT3EY2523389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0614d33d4bba27f33be46133f2433915940d1c0388727f01cd4a489ef6a8503e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3EZ2521789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a82cd7f1633af310e5881fff1858d81dc3664c513ad7701b4fe87ace746a80. 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/QT3EZ2521790.