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 0x4891059cbfb2f2d8cd69542d4a7960f008be9549245f7e46cb317b1b443dc57d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/484b2488-8d92-447f-82d8-e33181b9cb84.json and https://artists.proofprofile.net/proofs/artist/484b2488-8d92-447f-82d8-e33181b9cb84.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 0x267c6896005665db8c333e6a222d671efe58fc919aaf33bce475f48089b3797e. 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/ZAVC12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf796d14b957b61c08afcf422d2972515b2ae49652b64716d60da2572e0e4f733. 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/ZAVC12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b03abe40ce35ab07b0a468df75c7f8fe484d0030e735fe8343bfe65d72c4cad. 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/ZAVC12400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d24a97584e80e827c5bb76601d1118b74f682e2c8bef6933aea593d714aff7. 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/ZAVC12400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2307bec33c39ee03ffabc65e18ce3ed744fb77321f765f8a0de5f4c3538297. 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/ZAVC12100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc2ea5c2f38bdbdfc5ee0926486ddf7c44f45a3d5c830b5d95193dd1fc8c730. 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/ZAVC12100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc2ea5c2f38bdbdfc5ee0926486ddf7c44f45a3d5c830b5d95193dd1fc8c730. 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/ZAVC12100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dffbe5da1f4a3b4ae0d968e6b28c94f24c65499f3ffd1f5b2b481ae56a07760. 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/ZAA642000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce8f2a7d8c4c92a51d63bb461b5dc02fa992699e0fd98181c308278a474387f. 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/ZAY591001064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73988da6f33004394334451ae5cacba95be0a82427d73a9f1bd0766e91650ae9. 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/ZAY591001063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271a314116aaafc224c6827a8d95ac363d61600896cac1237e09bc66047c5a3c. 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/ZAY591001065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a898370acbf3efc51260097841b22da012904d6f219c7c2062c469959c9400e. 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/ZAY591001062.