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 0x20e4a3ad80f32414a290446f7dc654d003054b36bbf4828b793a7382f135d396. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87978180-781d-4662-ad45-f8833f2db03b.json and https://artists.proofprofile.net/proofs/artist/87978180-781d-4662-ad45-f8833f2db03b.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 0xa39bcded1a1369b576b57294bbbb665e7886c6d27db300ae57f5931ee70ed9aa. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZXLZ2372388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3180fc633583062f7ae383a5881443297f50d4c1cf01833d681b5759d48719. 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/QZXLZ2372391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0526ab13535f4f27d458067486584d1d9276e6eabb628d19eceba284b62749a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZXLZ2372392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393f82e201fd719ad18b02d0b2c8574623e4831a72a518b7c144e498da1d40a9. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZXLZ2372393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc291e236e4049fa44dd9b9236fb7ed7282a966f73a03e1e4fda36a829dfd018. 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/QZXLZ2372394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a681a6fa3d5986b7e29eb6f2f810a6fa73dc79af96dda094850acd1b93b6ee2. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:36:35Z), 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/QZXLZ2372395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052efadc6de1dc030faabe7514c19830fe5dc60b68949abf240b49b745efbf52. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:14Z), 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/QZZ972370182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b64b97e952c4156d758285bf78ca0d78e32dd0dd4a746a5c0578a21156c16a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:46:27Z), 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/QZZ972370183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8659b194d760dfd0fcaca7de5dc4f5cbb1b367dfd1e99f48163963739d6eb0c2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:54:38Z), 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/QZZ972370184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b7d1bda7702da907124830db4c8b8f46db5c471bee98b6869b8f81df1df89f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:23Z), 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/QZZ972370185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58f73b7d7455239eb8d652dab15c5e7681e7e191e01aa23d3b7c851804c3246. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZZ972370186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6d08df3b5df4fce1a0c78444bb4624e79d5866154827ff7e8f8fb8e844260e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ972370187.