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 0x890ebe6b8b3afb3f020ef1980647ee98409e06de6abc4e78f6b8f69232eb7c71. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0c134e2-108e-41bb-87cd-d2a97dc592bb.json and https://artists.proofprofile.net/proofs/artist/b0c134e2-108e-41bb-87cd-d2a97dc592bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Anchor Chains, Plane Motors & Train Whistles
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 0x1fe1a1fcc2b5d8fda6b508ebbc2b14644bd2a6dc4b6a125ce62891742432fcc5. 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/UK9AV2400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b749ae684c78d10af0010c2935658652581c8640506d356a43c039db0ddf2df. 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/UK9AV2400176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96253d2cba4672ec75456b8aec14f95250fb060d09cced01a22504a3a9ebc9be. 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/UK9AV2400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590a4563369bc1ad2dabf28939ee94727de50a2bbc179fc4bd1947b6f2e0c44c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UK9AV2400178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf229ee0ac5cf34d7749e26d39a19ca2e45f06638fec837fbc1afe5e6d1775ab. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UK9AV2400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590a4563369bc1ad2dabf28939ee94727de50a2bbc179fc4bd1947b6f2e0c44c. 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/UK9AV2400178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eeee1c49d0cc83e743e54498aaed2a4c709dc088f1942a689c215633b23e79. 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/UK9AV2302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530adfebb8330bb3281c1195f2341336213f3ac26bb6e5cb8793079928f3fa8f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UK9AV2302011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca5e19b5e3ddd76b6a8a4e963c18b19f69018b9d36709d1a81b6e9d0139cf9f. 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/UK9AV2302012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6538d08fb4ef1ff7b10b8c39348331e67ac4cbeacc8fb4b831932dcd9d93cab0. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T20:37:34Z), 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/UK9AV2302013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147cd602e211e11b8b2921dd691a9394fcf912e20a41e309a32772b25460ae39. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UK9AV2300607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6538d08fb4ef1ff7b10b8c39348331e67ac4cbeacc8fb4b831932dcd9d93cab0. 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/UK9AV2302013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530adfebb8330bb3281c1195f2341336213f3ac26bb6e5cb8793079928f3fa8f. 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/UK9AV2302011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eeee1c49d0cc83e743e54498aaed2a4c709dc088f1942a689c215633b23e79. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UK9AV2302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147cd602e211e11b8b2921dd691a9394fcf912e20a41e309a32772b25460ae39. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UK9AV2300607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147cd602e211e11b8b2921dd691a9394fcf912e20a41e309a32772b25460ae39. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UK9AV2300607.