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 0x345235bae81e4f3b38ae4c04d2fbb0774b478380b6a978665ca1c2abd5fcd3c3. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ecf8a5d-0689-477b-a107-0b3d25c6a4ce.json and https://artists.proofprofile.net/proofs/artist/1ecf8a5d-0689-477b-a107-0b3d25c6a4ce.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 0x8023e3307a2616000863825d4b1ff9aaf63267804500a6a3f7c011f13e2fb201. 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/QMJMT2003232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccf73d7a439960100cba9032d7d86f47bb4b5951164a8fc3a210a87bce421a6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMJMT2002869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31ae574b0b867534194e16d75d0840608e6cd4523dab9b8611b7380b3293de1. 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/QMJMT2002871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cef1e0ccb671bdc67daf8899521163c4aa90683997ac7109020aa4dad68424. 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/QMJMT2002649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4288d7f75adb58855b4305fd831fa4da6ac2d37123bdd75347e8f81cd165301a. 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/QMJMT2103866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e92ba1d93ebb6f2363604fed2548b783f8d365e58e09af3781b2264a57561c. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QMJMT2103951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090ef6c3cad70e961e2eb7771ecb3c816e314ef8b4e1e04f23fd9b4794a6736c. 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/QMJMT2003720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4288d7f75adb58855b4305fd831fa4da6ac2d37123bdd75347e8f81cd165301a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMJMT2103866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090ef6c3cad70e961e2eb7771ecb3c816e314ef8b4e1e04f23fd9b4794a6736c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMJMT2003720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31ae574b0b867534194e16d75d0840608e6cd4523dab9b8611b7380b3293de1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMJMT2002871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cef1e0ccb671bdc67daf8899521163c4aa90683997ac7109020aa4dad68424. 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/QMJMT2002649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cef1e0ccb671bdc67daf8899521163c4aa90683997ac7109020aa4dad68424. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMJMT2002649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb05baded09748b8dc9ba1f802a48fd5b78ec4839343aab5337611427ff3dcf9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEF1999097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea762f0f7a613715f8d09e302a5b5da81718438b07430492b7aeb392be01e98b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAEF1999102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb11333da23ef47c703f05969646f20dd69667aa8fb9c505b19390f530457df9. 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/TCAEF1999113.