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 0x31666e22c1c3f7e136e1ce8334bdd44e9040ccffa58c863b5ddc8e8ecf38360e. 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/a6ab4ef5-e2ae-42f6-a99d-fbf328f237b5.json and https://artists.proofprofile.net/proofs/artist/a6ab4ef5-e2ae-42f6-a99d-fbf328f237b5.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 0xa32f42d4d07d5e98ff9b629c3b7a74d30e7d98e132f0c3c9d90d31e3a03f38e2. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:31:18Z), 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/SE5W31800407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fbb9c2574c388409b38c5b457b86b489d05618eac95cd09431526ea1bdf8b8. 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/SE5W31800408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b7af0f588bd84be2bf4ceafac3d6af0f2f8abbe3747f4828a6bb97ac765016. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:11Z), 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/SE5W31916902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c94080b0cc3e5462ec2c6bc2e777ce043c44b19929f1083578c5990dab8957. 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/SE5W31916901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694dd0607df1ae2b51b5a345463d200da9cb39292bef9477e47eb6391ef9c748. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/SE5W31916903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79eda4984d3af5b718741321d6f8c92fbec989012b40826429686f61582e882. 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/SE5W32016901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2406e1f36f30e9787dfac88ffa77ad6e1fe2ed6cec322c7c25496bc6b7f5e1f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE5W32016903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821eedf40c12d592af37891540e31ac93c85f541634f0543a314604c6c760d72. 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/SE5W32500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe226a0426e63912be6a58f666f0c1ea10ac46bb500d3d21ed699e67872458aee. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/SE5W32506008.