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 0x23b258a468381094033e01233277bf2750f2000388fd3c8273d73e5f5837abfe. 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/bf05473e-c38a-40fe-b9a9-51528fc7fb40.json and https://artists.proofprofile.net/proofs/artist/bf05473e-c38a-40fe-b9a9-51528fc7fb40.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 0xd008c5152828f1bef3951711607c7f753df046c4a2dfbf4986d9379f3373cae6. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GRUM72200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3167a52d461c2b7f9f6be9d0d6da0bdcd8ed68321e249428d2975a78551942. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/GRUM72200422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5038055c9472bcc7f1cdb846a381859c11cfe4080bdf6d5fc05c819d8235a54. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GRUM72200390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae10dbb9804ab21df072f1093ec4b4fabfbeaf3d2d8ca3b3387f3741fbae78fb. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:27Z), 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/GRUM72200394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e3f0b64310c74f53518dc720adbc877650a5ade0ce98fea0bc639f021de2dd. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GRUM72200398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1d0ac126f07735e43325c33caa83dec11dec34635c032c8261078361150862. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GRUM72200446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422dea9df3c2a46f4d57491dcf4db224254c2d351a90092640a74661eb723a38. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GRUM72200444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f353f77e08825ccab5a6fee2cb940c10248582fb7753d38934ae01b5acd8f05. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:48:49Z), 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/GRUM72200445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1d0ac126f07735e43325c33caa83dec11dec34635c032c8261078361150862. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/GRUM72200446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70491e34ae983b7f07ad2da3074faf355313aeae90e75a83db34dd64f144c51. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GRUM72200449.