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 0x3b61e7c961f07a514ec96b3d48c42c6704cef389dcba9a75c59e3aec15bd0492. 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/848586b0-17bb-4b84-a90c-f6d424d4e725.json and https://artists.proofprofile.net/proofs/artist/848586b0-17bb-4b84-a90c-f6d424d4e725.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 0xccb6b506de6dab56251407d1673f1067a9f3ba9e251178088c598d59d3673add. 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/NGA601800183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770363df419f8bee7395e605576fcadfc0ea460b9c93131713cccdff33d616b9. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GBSMU6084080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6558ce9d42c27bf42d2f7561ecf8f7cb58b1b984c377b1d01187f358fbbe32. 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/QZMEN2112727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d781f06840ab1b091c98a1a98949bccceaae39bf4f21d1fe605f9fd3d849e7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHNB2204644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6d393fc066a7c9311a561de0f5d9eca1635dc7bed22a34a9f2660e03747ccf. Chain 2 (Bitcoin): anchored in block 957839 (2026-07-13T10:06:30Z), 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/QZTAS2288083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4e8edc9d286d19cb0322c52594c4a94a68ddf8949c1c5f3a8952555e7f587d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNB2312978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8e55a3595d0419a9dad058e206eaa58f1332ce94516de0f37f2ccee5fd07eb. 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/QZHNB2312979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dbd7a13248f4b82d054560b2b1eebf4eb41520142861028d119ccc2ee2db53. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHNB2312981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a7847748e891eaf63888c30c87fc31a6abdffac99f2e4d23884b4b8669c4b4. 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/QZHNB2312982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a27a60f9ab7f9ce7fa3f1b3a9479dad1a3e3000a48d23bfe3ef19a6c611982d. 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/QZTAT2205731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1fcf73536c9a7fa0d2dfa097e28de8f02f117cf89d9666adad72a5ac7d629e. 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/QZNWT2385928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe456d8c7d745ae48605842f88aec4affc44373222da301bff9018a8bff5f8d67. 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/QZTB72349431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358bf249c075a71f2393a3bce46d2180a952809f1b5b64e17925843ec64e58e3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:52Z), 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/QZWFM2353160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a6f5c59c22e8cc63443b43be93d47b5a34d8dfedffe3ac2bf02398a0da6515. 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/QZTAT2205727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11951ddbf1b9260758da1c473b0f22e38de4860f3ee9c83e4e89f5e2eb17fc8a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA82480846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbd1599084f9cd6744bd9319dbbcfcb8f8296193c1109a6a1361c58f2eb985a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ42233347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eee85aa4957bb95c9b337deb1bea25f85fb7e827d5dd228ef011ebe7cd1e78. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:53:44Z), 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/QZDA82480847.