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 0x3cc3428090384f819857121857fd5c013686335d4012b864da4310a3315778d1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/408cf35e-0dc1-4c94-ae72-7faf98773e0b.json and https://artists.proofprofile.net/proofs/artist/408cf35e-0dc1-4c94-ae72-7faf98773e0b.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 0x5c920b8527686588e79b39b80f4a3e1b1fccb163508c58ebe05654c8b3a8cc15. 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/CAQOI2300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2506ccc7d9c2eedda107a3b1f1062bac64677ad01099b3208e720fb143408fd7. 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/GX8LD2280854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0be04f3733d1faec221889dc0598eac43ace1f569e7c5c3e2fcf3ecd732628. 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/GBSMU0107438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ea5933e6117ba74ac3b190a307fcf86e7a30849a08e2ea4c4b4c663e0e4ac1. 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/BE8LH2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031304a9b8b8c922b196ae3b2aa0df0d998c0a0b5af89f5327d9f984aac51128. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZS632176583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb71b1f9bd907dcdb282897edc72a24230cc40a6cf22ab6ba4c57fe69ce4397. 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/BXYUO2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21385756dfd072144e7cd0c7f4113e093503671b24ea8bb1ab7ebb4f0db42baa. 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/GB2LD1800452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c6061c6150b09ca77657d93431be617bd2b2c033a4f38c4948d65bdc8558cb. 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/NLE802000596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac64c607ff000892507d10bed7de7a2b9ca0b45994b5446b0d8d172c0598db1. 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/NLE802100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89269cc30279fbd010fd5fd82765c9487ebf504c8e94d3b4235337124095f1f. 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/CA5KR2169365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522f3b8bb0ca4e242fc1a35cf1ab39d6ee6de786d254655cf917052131b31ba2. 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/NLE802100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf1c34a85e9bad999897c14a5bfab0154124b073adc5b1a26dfa8f4ba5b809f. 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/NLE802100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7696e48f87f3df712ad94e64f06ecc4f452a2191b568c6c94fefea558f7504a5. 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/GBSMU9190885.