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 0x58c677c8526282d70316fb56b43884f6338b616375369e1dae4887da8e94625f. 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/94d41b07-9c24-4ae5-b30b-c860e966dc84.json and https://artists.proofprofile.net/proofs/artist/94d41b07-9c24-4ae5-b30b-c860e966dc84.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 0xce410311962e8cbc33d334ec965676b4fd4f2b77200f8ebc51373c242ece0cef. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR59R1747153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c3a7642a71245b6373a2e3417fd561a3230062861f6f291f4c485d8b6ee67a. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FR59R1747154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2145e208489644a204a9823088461b5b959e73e986975db3d5b80a244f03596. 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/FR59R1747156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee348ba3e73f9596931275e183d33ef9d9f22bec646d6de935df40a2eff6c88c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBKPL2094662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81700bf2e5164ef3b17e641c17edf45f91dac05d62fbe03f9331a64e4175cc2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ8GX1701110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a19380a68637fea28adbf5f9a6caa609681b884c86b1af9cd06ec3009be123. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZ8GX1701300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddecf8fb8bf01e2e75d2252d1e6698fe8bcd84c31917af4e7532e3667b6f9377. 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/QZ8GX1701307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafd8672b3b88c76e48430eb28dd9a9f556e0322bbed334622a90127e218ec05. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ8GX1701328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6062b18b73d9395cabd4f84c6003968ffe864ad1feb78a6c1ba503dbe9f381b. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/CH7812416561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bfd9bc1fb6075e2bd6d01f65307e746de1a6c49a92bfa27a21400588a81fdf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2089755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074e6c1e72443ab5c624eae466552de51ab44f0cffa7f610c2d1ebeecc48e20d. 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/QM6N22016366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47550f0c4550d9a348de6c3bb9186a2f92e8463c943ab4735fcf4976e6ab36b7. 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/QM6N22016373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10cb1a05fc82692bdbe8b8918d4f2072561382f3e04cd4ff50dad212456a713. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ31976189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10cb1a05fc82692bdbe8b8918d4f2072561382f3e04cd4ff50dad212456a713. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ31976189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce72fdbef86eaac24ad91af1692af1ceeca49b6cfddb47876ed559b1972972ee. 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/FRU701600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fae5220a46381add22bcf1056a44b214b3ea9e30a1cf6288111571ad460d3b3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ82H1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac80fa327cb4f5975f0d3e1814fcac53a0f91b4dcaff4b4576947c25f98238ce. 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/QZS662218150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243024fc25a22d3c3cd0e3cdbb82cbc78ee9e709f0d96da6e539ee1662f79f2b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRU701800017.