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 0xf04a9b2bc0266ff79dcdc65f84b41769c73795f79eec8bfc0f10615bd69515c7. 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/99a1d686-e2cd-44e4-a42b-712a504e405e.json and https://artists.proofprofile.net/proofs/artist/99a1d686-e2cd-44e4-a42b-712a504e405e.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 0x94e3430ae6c85342248e3ec08a0397bd7b6c1a8859d66e951b26ec6eb29d992d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/BX7DT2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35109a01dbed6154f269313fc9dd019d81fd32a15de0b832e2e015f7e71d5f4a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BX7DT2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd36880b0979fd46459e8333cc682357b68bea2406cdc160f01f8bcbbcc25d7a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX7DT2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad347b8d01ab050e8bba162e5057d68150c527dc8c0e7bf87e5e94ee9036375. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX7DT2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd56502262725d5e1d8dc48da194775a213c2c5fc3ea3a0818b2ba65c6617786. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BX7DT2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26420604f0440b138b87c64e92b2fc3f440032cabda58bdc228c002dab6b8464. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX7DT2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8d92ddc6cb111479e6c21a49bdd37c38d7ab3aadf116459a7784645101ba0d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BX7DT2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199506d7b15da05b75a4351f536e236c3c6f86aeb356bc7729261acc1ae2af44. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/BX7DT2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca917048946bfd5e92bd9a1845fba760abadf1832fab89278a4a429118f0246. 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/BX7DT2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508ec1dad16cc31e55719675f1744959fa0ab40a62b6bd06784c05ebe9ee64ac. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BX7DT2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb5f81220855c0bdfafa1ec6f7fc6581b0ffa3e03a6462eed6386b5867d1684. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:20:03Z), 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/BX7DT2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82aa22a608170c298005f9aa7b37aa699c235e62f80f8094510d39637cc55b68. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BX7DT2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e51dbb94807d2ad4035cd461fe57816aa61765fd1bd0099c96089ccc2984a2d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BX7DT2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb972ebb667cd1c2e4baf7a7b547eb67d47fa9404caea5e5eb8aff5b570688f47. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BX7DT2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff97d1a14acdf917a67eea154c52019cdc8ce89486f32465015041ad407a716. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BK3GI2500008.