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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ad690cc6b5dd6fbfcf99205f5334ee6c955fc788583ee70f19a1e6192ed267. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/546eada1-054e-4ab2-a1f6-47f0803dc2b4.json and https://artists.proofprofile.net/proofs/artist/546eada1-054e-4ab2-a1f6-47f0803dc2b4.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc837b7f64e2a27611abbdadf96ec28adc392bcea27397b14224c90e870cb234d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZ7RW1701001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5e12d41a1d60ac22ba43ed2a5d3b39a3a1db6c8e39de34991981dcb6a451a7. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZ7RW2001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152218882ea405821cfe53badbc3be13b927e3c842c649ac3c04e22a93fa338f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ7RW2001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785323bdd497715777195fe892fee52fd5b4b79b2fcb16027749b91c8ffd5657. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZ7RW2001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad14dbf01264ab7b0285c6e18a2696c6d40baa2695124145ccef8222e662a778. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/QZ7RW2001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2408aff5580748bf3616e32b150a515b6b7142b2a02bf48e855c88198aa498. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZ7RW2102001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f7c5b58ad640a2fd17d6d55fba2bd29c3ec56c47d532ec3f1974f698e727c9. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZ7RW2102002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8b1aeeac5f8d1c223c6edfd21cd990bcdad565b7204f1a1f4a9e8e46d8b22b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZ7RW2102005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19867f77a80a804d243dc6ea0c62d3fee347932dbaf6bc289654b1d97f43795d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/DEQN42400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd9de908a39db69d01fa3fe1988f84fb19a96e169f31f83e44e2f12d8e4e488. 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/DEQN42400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5056c7e40a43eb8dd8c80a3ada6a51401b66edd22ac11fffd2741f433aba3b44. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/DEQN42400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b9be8c35878a3d851b58c44e31e210dceb07f3c7201a490c31af3c3edd460a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEQN42400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada086af7cdd97e41596771e04849730ba734dc64a8e2d5fe395558e5640d912. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEQN42400024.