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 0x998a542f7f15571f1d8c58f55b42609aecacb4273b1312da142aebd95059ae09. 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/49a4c824-6ba0-410c-ac40-2bcafeac4020.json and https://artists.proofprofile.net/proofs/artist/49a4c824-6ba0-410c-ac40-2bcafeac4020.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 0x0a4e4ab1293adfbed13939c7933860e554fcb9c89b70fc505a07243a97d54cf5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RO2DY2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3c68dfeee59a49faf9f21ef37d252f4001562566aa0f2c6c199bea76a62fb0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ROUM72300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad271e1abe980e807099e56d56ae3198edb0dd78d771b6e756d6b47a81f5b3d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ROUM72300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c8d639dd15964c04d796cd5ff9cee0464244fc45cadc671b61f617f5096b25. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/ROUM72400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05043d9a472487c64cc423fee201cc9dd02df8d0530ffd3a3a9bed5526e8be2. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:46:34Z), 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/ROUM72400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5d0a4a2528676c484344342329e83cb88b6359ea5aa899f9da00ffa0d6e416. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/ROUM72400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd962ff718142435f2ac2406ceca76fe3d7a069695af96a89f75531ab95cb09a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ROUM72400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf318d1bdaee1a8e9c9a8262c14e96881707d24541ac672148aef6146d356b95f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ROUM72400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ec449c2d9abf23a22521a200bde42e5c8b9e225c2885ae215ece8006dee379. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ROUM72500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065e59c7ecf86854833f79a34dbd5963f4ae6c31efafac1415c5d5b4545eb50d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ROUM72500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb286771d7eb186962404fae3ac944ab5587fcb283984fad36cd3d51ff9667ff4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ROUM72500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc96f125786f37a0a694690687da53a7fac49d7a07dc2fa7e34e1696780ffac1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/ROUM72500066.