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 0xd058c7e65f1ac9f66ef712af8af0b100764e6611d2178b1e1ebc9f2d82f1e9f9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cb0ac93-f162-42c0-92eb-9287bf8626c9.json and https://artists.proofprofile.net/proofs/artist/2cb0ac93-f162-42c0-92eb-9287bf8626c9.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 0xa0514c7d8ec7cc9b04ffa65903ba019281dcc425639ec6158eddc1b18f4396fc. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZZ782436157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed11b693ae77312827290c9f5fbabf0cadc25d4e8b1d823760114157baf50f45. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZZ782472464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963cf2660d49020cadcba81d0b7bf4474f06d4bb3a439140f9a1493d47854be3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:04:40Z), 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/QZZ782474933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf24b7072de53a22abc1cd35f777b29ad31d878ef6551bae38c6bf7cf4864f82. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZZ7L2498028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f5d9a34ae0e4b7c8a119fa6aab87cd15d7b14f677aba915723abb5ea05ba84. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7M2478619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4904f576ce1de8f89eac6f43d4546c76328cfd90ad1f50763188e45a0a36b2e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:12:17Z), 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/QZZ7N2445873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2210b888ad2454456aa404fb6866101d358f0fa6fe7f51326a24cc29ccf201. 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/QT3F32414770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb897f6b0e41b1d9b605556d48758b197688b3c2ae6797dc3d57bbe75ae4989c7. 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/QT3F32414780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a66f4260d9a1c5b7b7fdd8720506237ebb1df45873940de1e61b93d45f8afdd. 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/QZFYX2594470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e677bfff252db78fa985a34d5e505fffea9bb68f81c8b65559dd19856ced1fe. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZFYX2596337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99db70d458d2ccf258fd01c2b2219308cfe561cbd1cc5d234dd9e67bd3edb17. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZFYZ2533806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd665e739c10bea94b35629c45e42272be3ea08b5053fb08157534a31bed2202c. 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/QZFZ72598831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444c1f8def4db1e0b9226be7133b817a48e6ae76e463bbb0ea807830730ebee3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:03:48Z), 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/QZDA72573409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e30c60d76fce4339c18f01338ffdf33077fed01d91b6c9806974459ec10741c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA72599485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe744b3e6e038072bbd6945d0704a251bad6eaf2426add287b6cea688736c05. 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/QZES92599667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed3e0bc2d701bb76d263bb036d8effd08582f7c3bd4ae13f671f1bc324c3c2e. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:29:09Z), 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/QZHN52581604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e6b7c271f5a932777d070fc4e804d453c7b16a4947405daeecc19208da2af9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6N2574211.