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 0x1e848c03e090a0eed90cd1c4881e2793ac06fc8c3a4b869992714e1a465b0c4e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaebb73e-4db4-45c2-9318-6b05c3826918.json and https://artists.proofprofile.net/proofs/artist/eaebb73e-4db4-45c2-9318-6b05c3826918.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 0x80b9877f2c9f5922ac91ac52cfd31dc12362b4a914a611974bf6f7669f243947. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAES2003431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b9877f2c9f5922ac91ac52cfd31dc12362b4a914a611974bf6f7669f243947. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/TCAES2003431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3000c41af7414683994f57d4ab97b74b3e8a8f3df0e5991a08a39c662227eef. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBWUL2226609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3000c41af7414683994f57d4ab97b74b3e8a8f3df0e5991a08a39c662227eef. 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/GBWUL2226609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5bf01387076692275d434d3661bd029a05d9e9be1e6cf47af66b4b925c6682. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:40:25Z), 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/GBWUL2226619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195c65b30562fc8b4c63ba0e220ffaa681c9b9f6ecc789247474a3cde1d8bff9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZTLA2344693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b833adf240f55feae8f1b9d2d034268bab1c246b42684b1f710b0ffa1f4a01. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTLA2373193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b833adf240f55feae8f1b9d2d034268bab1c246b42684b1f710b0ffa1f4a01. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:39:51Z), 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/QZTLA2373193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab4130f4ad069bfa80ccd16eaa9e9b2332dff4d1a0cfdc7736d2c60fc6a3903. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZS7J2369340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab4130f4ad069bfa80ccd16eaa9e9b2332dff4d1a0cfdc7736d2c60fc6a3903. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZS7J2369340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d77053207eb00984d8e6a26cae90aaa7298dadbb9b01e641e3dabfc200376d0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZSYP2311460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d77053207eb00984d8e6a26cae90aaa7298dadbb9b01e641e3dabfc200376d0. 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/QZSYP2311460.