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 0x22948b5206344d5b545dc68d60b74d07adb093bcf1bcc22612caf191f2f0d590. 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/a5337324-8acc-49d3-aedc-cd559ddf824e.json and https://artists.proofprofile.net/proofs/artist/a5337324-8acc-49d3-aedc-cd559ddf824e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Grandma Got Run over by a Tour Van, Vol. 1
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 0x4b64cb1e35d1606f352bf3499f671baacf3315adea4ec228f559c9aa0e12be59. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZTB72406742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28957a6e419064a466b42922046615deb5024f3d465dded74ac429a468d2a239. 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/QZWFE2454360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71997040705bf8126d24bf0f52d7361304a77aa3999d4a58cb6b85c48a518ed3. 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/QZWFL2498083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c1b2912a83e917eb872016cd5c5e566ecdeb2c6457fecbb7f9aac0c9d60bf8. 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/QZWFL2498084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28957a6e419064a466b42922046615deb5024f3d465dded74ac429a468d2a239. 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/QZWFE2454360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b64cb1e35d1606f352bf3499f671baacf3315adea4ec228f559c9aa0e12be59. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB72406742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c535d92e65747b9b6e6c7bfbfebd62f5df4aa004df70083af2f91fc78aebcab. 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/QZK6N2446902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc157f068e6d1f596ad6a54dd1b9cf6cd07ce164e9744b3478daac44786ff03fd. 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/QZPLS2268763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4542f5a531b5f6ca1a47442c9abddf97ab68800235f28914ecb38d1cc8047599. 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/QZNWR2444326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c1d6f1c0a343ab250d4697ef2a52fba315d924b8b7e9e7174bb359cae4e1fb. 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/QZTAS2328788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e56db7c9360d56c0061bedee20e3bc455de91154843fa68566b373ead69013. 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/QZFZ22467819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0abf26be5d223e5e077a4b19c86b7e9b9b1c8248a3e19f348b4abf1d94ad0d. 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/QZTB42474613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5b091b38aeffb67fb06a8fad94c4c5d8448b7cde8c0d9e7d2536b8951ac0c0. 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/QZGLS2430611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ec41884a0eaa2869d2e6d69fa2ee4c5074a30685bdd92d9b5718f658da88b8. 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/QZTAS2328006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca91d371b73ec6bd49a5e4baff8dd0af3c187a662b8d86eabde52de2b8e39a56. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZDA72322127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5283a9386519389ee80a7a603eff5c947ad6deb538fd5ae82617a9f8759d16. 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/QZTB42233437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bf100d576882af7720cebd7b097e77ba71e6fa3e53773604840bbd557e5398. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:18:26Z), 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/QZMER2263478.