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 0xd8ded0063fe0eb26a9fb815f8ed637f93619d438d86560afccfde43edf92307e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8669394-77b2-4a93-8cde-138f1335b0e2.json and https://artists.proofprofile.net/proofs/artist/e8669394-77b2-4a93-8cde-138f1335b0e2.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 0x416ad6707faf8f790902ddbeaee963fcfbd79da51aae9c8e4aa6def69614b450. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBQQG0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fc9cd13016ef181d5099ffd8ca939407d4828e4f223fb788246cc68f9ff449. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBQQG0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb0ab824a3bf16a3629cffad3b2f00e7a69cf294cd8e55fde9217bc8ccd1291. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBQQG0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fc912acd6f8d8f1c228c8107ad0c08f44861441548b0beab2c739f4dd60a65. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBQQG0900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18441da1424577b1af0d5595c88ae18c77d64e258a4cd2537055110fae07158f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBQQG0900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bde33c4f06411f3d3fdddcee3cc5926d49b6271c72152ed2881a8c6211d94e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBQQG0900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9734d615d00a0423ed9b8f614f8b978a8e99c601993b400ab05ba1a75cf87aa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBQQG0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8078889bf8bfbb20c3f5298beb10771d0c7e5543f272971c388eeb9559c25e3b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBQQG0900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbb888b9684e7c5225e3ea882edd4be3c83ead97c8c9256d39b86ebec268205. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBQQG0900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf510d4bcba1f8de6183b556f2a5bf961be99cc4a3ad3f0259d3beb0f2ec24f4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBQQG0900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fbcbac8195628c36ff188eaec62d3c07f53d6df268965ffb47d981a1fb565b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBQQG0900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db4511b73efc5d45131610f1f4a0738d5641d83d128a2dbeacfe0be4e5880eb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBQQG0900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614e3efd9ac424b3c5cc000326c8138431b9e167a9bad9353e2e7132054cce72. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBQQG0900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c807753f0a1e637e7720e4148811c4845e655a59d6712dfff42a484e6b51ee3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBQQG0900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a811bcf317c62a672f28ce8a7613978b8be51b7084ff59f30c48c41e438fe6f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBQQG0900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cf14c5147c598aa53d38dd862155cb5b6cc7b7873d9d910dd3d443c2dbaec8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBQQG0900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1aab7a38d4764ef7127cea7c1458c2c3a32652da823fecebed1f156297e12cb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBQQG0900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc5dd2010336fcdd5d8f2d670ab89e7cc2ad788af8f8aaef089fe6e6414e6af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBQQG0900018.