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 0xd81b95345b94e228fabbf5245c094ebc9d832abcbcd5ed5e1d76579866a7d2ba. 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/00f8a2e2-3203-44e9-8a23-4e955c7a8489.json and https://artists.proofprofile.net/proofs/artist/00f8a2e2-3203-44e9-8a23-4e955c7a8489.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 0x4ddb541b47a60d936619e277cf538664316e7ba9704624d3bd9a134204c86dae. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:49:18Z), 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/QZTVM2495871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd8faa02c15565554f03f7f989acc8ae60485687a4eb3b67f442dbec6387c1c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:43:42Z), 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/QZTVM2495878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3057d6f582e951652e2d2b0269787ec302fec7df002c745a0814ea3b9a68005. 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/QZTVM2495479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff97b49a37d20763d5ded7fd3d4366453dee0e5625101edce23b4c607895408f. 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/QZTVM2495511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508c287faa6c3a1205bf1a4ca1941c6b79f8f12d89aeb40736527c190a771965. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:22:53Z), 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/QZTVM2495877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0d253f603ebce95bd801a0995438b25b491bed45a0392bad742e99aa04b8df. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZTVM2495505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa49b831f534532e2954464cef44d0c356c0e5684d56060d11684c814bae687. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:35:42Z), 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/QZTVM2495872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016a34270499929f9c02b7cdfb46c0d25ba747ea56d87cbd085a316c3ea38ebd. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/QZTVM2495495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870cef1a8848cff5f611d2dc130959a6002bb10f9c310960f455ec34eae799b2. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/QZTVM2495491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a86f91bb68990292095f0229c2711634b94b67a136b692fc04f0ab050fe791. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:21:55Z), 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/QZTVM2495496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3054ba8bf0b96628289b0798772c2ca5c598844280b00d11d38d9c24873515. 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/QZTVM2495539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a6da36988b475f0ec7158a1e7805684a7c68ac825bd20137ff95cffebce6a0. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QZTVM2495498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5da9897c55f4b1107feee7163d71d252feb56f874846be1e455c16dae4af06. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZTVM2495835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e377749ba77aaabd3bd580ae383b447aa6e4df556a11d3ecf6ac863f9d5d0bf. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:36:00Z), 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/QZTVM2495883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077e4c1aaa330d5241e253edfa7eb2ea3a783ebe938c6eb91a06e5f231f4275b. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/QZTVM2495501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4143237585203734ea8e46bf11dea418ca121151c5a0c4107e3471f62b31e782. 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/QZTVM2495533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd253169bc6564e5260770fc9cb2e0335063b7302209d36f50d02d8d2f630d4c6. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:35:20Z), 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/QZTVM2495869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf385ab6ac1e33f5c884ff92e8968ae4bb1b98bccf63ec9a222da9c0083019b5c. 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/QZTVM2495882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a934af2a866d773ce2e6077bb9f92e66791cfa6c4270dc1bbe781e893159c79. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZTVM2495476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5f975ac7b711681ec9028db4ce41ab33f8a44c2762072e6f761a90be730a8e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTVM2495750.