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 0x432cc7387de6d3f0515a1fc77f2a05fdf5f78b62df5285ab97e7bb3599aa550d. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17a5c69c-b122-4f3b-9d74-d8f57fa3b0b7.json and https://artists.proofprofile.net/proofs/artist/17a5c69c-b122-4f3b-9d74-d8f57fa3b0b7.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 0x2b408bf94b46b371076f8fc39d5df79310d7e98d0d7a382ce32a84f26f24d38f. 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/USA2P2334773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19a66b0cba5ee854b88663e62e80d35bb9b62d3b9ec5debc3bbfdf7c96d4e2c. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USZ4V2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002c569466955bb37bfdd8ecce9719702cf832379a5acece54c22313c70214d4. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FRDX62402040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf027dc98acae6f5cd8b2d7ea494888b47e41eb06d16ac3030dbcb5bdf7596c. 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/USA2P2443331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f464d524a722d882a36f4dff98f058599bd155bb3d69ccacaf162ff2222cf4c. 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/USA2P2443332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0626f60e84fb9ecc6466560a540af6c9f5255ad9b7a49841ab881c24f317281d. 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/USA2P2443333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2388959a003114b8f00f888d911538161c25abc3042ab0840994ae346ca68c. 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/USZ4V2500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bb584df074e3d1644af30eb6ee65f4328e1f087f8e7a3b944a877993580d3d. 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/USZ4V2500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ce4c2f9289e3f92ee4f3f810b93f93ff1244f5fee78c9a960de9f4b35ccd6c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USZ4V2500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21853195ca4eea297ff2870a4061388f4d639753ba6e5483c7f8482468ba747. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLZ8C2500360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f1dc287be51357725856cedb75c9f651a660d00b09f210864be9e6661768a4. 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/NLZ8C2500362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fc85b95dda3a7a6480bf302aced4f6c581726cb2e2ec6f17a20597153c5def. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USZ4V2500378.