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 0x2380a39e3c85419613e1b09c48df80aa508b4ed6dd7995c13a958f778e8840a1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5328107-52b5-4162-a470-cf6f91bc1347.json and https://artists.proofprofile.net/proofs/artist/e5328107-52b5-4162-a470-cf6f91bc1347.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 0xfac6cd4e9fc1d188994a41e6acbf204385148d055fc8ca56d320ceaadae2dbf6. 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/QMPKX1795028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212d4ad4cebf4c173be8ae4f6c06dc5bda38cc03953327ddd9fd10aead376c02. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:13Z), 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/UST8K1721025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9088b5579a2c7b804eb4f0ba4c53f7950da1f6f58c19d1d5ef9a453e7864768a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ9Y21742368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0951f14f114b3a6a70d2c083b2dc4dd5a9a2095b02eee3be043dac2293ab002. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZK6K2059274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150ce864403cafec609f69820a4a07dd0dc4d5998617ec48fc4986cb477c4ded. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:03:06Z), 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/QZK6J2284050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9930c11754590525804da2e59e823318a1582146d2b36270e55e75b9e30a0988. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHN92328225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14b70e9c100213b14d53aeb089a10eaa1acbf02dd7a6f50463620a83402cfbc. 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/QZHN92336398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc78578bc7d3b3988d994c7cc80a60d79cb3bdeedaf5a7bd5c3d5e849c760dda. 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/QZHN92338701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e89cdc2d82bef8c47953d377a83c59f4b034b36dba4b400e2d4a68eb249265. 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/QZMEN2568755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fbaac2c43f3b833c72d9dabda6bf7ea255fea1ea1bd423a04ddbcc06eb4cc2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:01:36Z), 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/USY242437981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffeb6fec188f7655727df4b55f5072611922438ef2bf24bc937dbe745307f06. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USY242437982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9419e0824e8b9f9fcae4990bc9ce5c4a855e49a2ed87252dc2cc1be99d4fe6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USY242437983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d55ca51d5fa3b07838f070dc3dcfeb95874397e222c42fa43ea2251bdb1e886. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:31Z), 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/QZNWT2589728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e54537331d1b7732f1875372ae4940da583564575089c9a0fd6b0130180a3e. 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/QZZ7K2585296.