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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc628a657e938029edb7199a6eac21ca1c436118112baae0ef1fd165d8a9b3cd2. 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/822074e8-62ec-4610-b2f2-7cf11194e464.json and https://artists.proofprofile.net/proofs/artist/822074e8-62ec-4610-b2f2-7cf11194e464.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3502b0101863475d8b3a96a99f0ee64309a5ac105f7dab4f08077c1054e507f3. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/SEYOK1660236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a1e21ca3ff0c308fe186ca98e2e84ff62d6ed5c88c244f15e19e3ff169c78c. 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/SEYOK1660239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416736f10cca65160757fa9920b092cc3d38e34596d5b70767bcac628653c81e. 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/SEYOK1660241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4479164522420318132f7ea5752d6b0b56351e609b3bc658f0307b06291eb2b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SEYOK1660243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26e505f3ec0d7ec1c2fd7fe3cb23216c44acc684237702c77c6ecefdcb7ab28. 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/SEYOK1660245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3514e5bf3d4a7e317c94d03626da21e3fcb2eb598737915997cdeea8bc700b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SEYOK1658816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cf038835ae89f748ed63810f5ef471cb8fdaded6ebe6b99ee1f667b6389da4. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/SEYOK1818926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b5f1d25e6eb030e299d20648f5aa7315127cbb7d8af7a6df0a168f3ae1b607. 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/SEYOK2114769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec44ad76dda836751ca7892a0161d3e866ef89eaf38ee4991c8cd83c2bdabc7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SEYOK2119597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646764e4987d5686da6fe264bdd86fcf80897ebd1119464e362e8f9b6cf5d591. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/SEYOK2117924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9ce8fe217ceb6403a0d02a0ccdcf28911c6c22fafb08ca324f0c62a95474ac. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/SEYOK2119599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bda2156fcb052a07d5f45ac3eaba91e1bc3e4d554ec3396ea6a9962ba76ea1. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:21:28Z), 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/SEYOK2119602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2aa25c8e418eb6b29dd3a03d54cb78c0469a56db48139dd687b18994e2e984. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:06:49Z), 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/SEYOK2119603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e8b3bcce81efdccc1f811a940f9b76da82c88542370c0cfe9810750900d91d. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/SEYOK2119604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac6b885b3622112e1a2e778e549c9fd0dc77723626eac15b242483d359627b4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEXC82100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8382493f4b643e0d65172bfcabfc5f7f3feca2e72425ea7eeeb6649f44373d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QM6MZ2449536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ef7d0d0fed62e8d3289917fb3d12419a3e8b49b4d0fa05623b446d7b4b444a. 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/QM6P42420581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bfb102e2c963a5c54736755f7147dd15e253e7ad1d37d83b225282c7966592. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QM7282480840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7530f387a79a68f45f560e906472fad878e2b3e12954bc5bcefa3b4bcf9a1ea. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMBZ92427228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cfd6f0ef00760385281c4e04cdd6234324e6afaf52d982c56c035c6f69268c. 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/QMBZ92427225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8efb31d8ad6c35715cb25029fc53b0181f6fe368b25b66a2e3fc4983aaba050. 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/SEYOK1820761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacb6cf39a304dacd536eabb6731cc1364ba6d5677cfdafd674a0de536cecb33. 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/QZTB52265580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82b9e52602141f616a958b170dc8835a63607101464d256940371afb5db3a0d. 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/SE3SA2301401.