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 0xb85ffd4abe48c2d474c7e67c09b1ecdefe46cda6bf8dd48c221670c280f424f3. 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/ac6c9c65-e52f-49de-9911-8fb624627507.json and https://artists.proofprofile.net/proofs/artist/ac6c9c65-e52f-49de-9911-8fb624627507.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 0x7a8608a50439fb48bffff2e72b25aeacc2e15b552e35582b6991d0bb9eb1cd0f. 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/QZRP52340521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecbcc0da1557bdab3122309a0b2686ef339e93077e23079166d98de62f695b4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZRP52340523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8423d6b7cddd189177da398f9bdb0a0e40cdc557b596a919c11979ebc94e1a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZRP52340526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f41437d08f8f5469a068ab0d190c44066d5140425ff5263ab65d1ec68c9f95. 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/QZRP52340520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8608a50439fb48bffff2e72b25aeacc2e15b552e35582b6991d0bb9eb1cd0f. 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/QZRP52340521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd984dea36e6f556d8f4d2c338bab373fa1b8ffd1f82a7dbe3e4bee9b98960207. 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/QZRP52340524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8423d6b7cddd189177da398f9bdb0a0e40cdc557b596a919c11979ebc94e1a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZRP52340526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a71a7089280730166155de64211777839d68021c93a10fed24be12317853fb6. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:04:05Z), 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/QZTAZ2464735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a9c5d28354205909236cf178a748d7640ff59bb166ac2a5f718d2cfb292283. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZTAZ2464738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11426c303a88667f8fc1854257ecd234d38a38d1fb3159d837544ea131df6df3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:53:46Z), 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/QZTAZ2464739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a71a7089280730166155de64211777839d68021c93a10fed24be12317853fb6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAZ2464735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a9c5d28354205909236cf178a748d7640ff59bb166ac2a5f718d2cfb292283. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTAZ2464738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11426c303a88667f8fc1854257ecd234d38a38d1fb3159d837544ea131df6df3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAZ2464739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94470ad34556811a33518c584bd8a6a5441c4d3010190df22f64ece477f1b0e3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZFYY2416081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6796411dffc4651c8393eaade41c0408ded817dd5e2830da6d38a20c9d6c915. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZS7J2517955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f19d3e654b9aa6f519c322e4363eded0eacb4efa9ce87b663dc916b7ced2f9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZQAY2567412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93a8c06d22a0453cf7428aee2c50e168286c8f82d9dd32c4de7f4710ce6a364. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:55:04Z), 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/QZQAY2580155.