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 0x12c6e48025bd1f227ca8a1b0d849f8e1c1c704a210794f0cd44ba7085b2ed6f2. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/130f0599-0910-4fb1-a20a-d6090ee856c6.json and https://artists.proofprofile.net/proofs/artist/130f0599-0910-4fb1-a20a-d6090ee856c6.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 0xac3b09df4dae10aac2214a258758104e1f0f85dfbe2e7e62933019b770a6ae9c. 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/QZWFF2314164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb9f1b87d9db082dae2a015fbe847d45b90b72fd9d92e34a68e4b8c0c7653da. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZWFF2314165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b442cb0f91b980746819bb54302b79011982bc0687c13637e6d4a90589cfbc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFF2314166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6317925bd6622e6c2f5ddd88b63de6017c20bc936cacde07e60186aefd116a. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZWFF2314167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957237fb81d8aaafc824ec47613ae6e89a522432564a79252f27d7ec603eb0e7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFF2314168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a6a6d8185fb8180212d1ec6c6f7ec45bd5f472194f668e07f80339457ae426. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZWFF2314169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ff9e9266f9ef6fd993b41e640f39e36f4fc31c14119d21769eea7102665ee0. 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/QZWFF2314170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f1bc9ee0fe571a80d20d5503e4b3cba3482e298e74aa89f92452f9df04b8d1. 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/QZWFF2314171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8debdd2a6e506fdd773ddd9922a916960fd26656b5ac2455add5ec5eb39d04f2. 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/QZWFF2314172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee6bc3d0bfba6235e9e78e12d301d636f7921e60f2c8c81c77846581985ce87. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZWFF2314173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bc95076462b2a71016d81f66d9dc477736c4f6ec08d1a9ac37ff584b03087f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFF2314174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce1b3ef0edb910141601cf8960885a62ddc74cbb3939be95fcc08275f7b2a29. 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/QZWFF2314175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2157c94f9692cabab73bf0d764bbbf1d300b27b47a42dd4247ebb16f7ed8432d. 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/QZWFF2314176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf42b2bbf540dc8a83c987a5aa49d927e1180dbe6d1ae2697270ba22b29a4ed7. 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/QZWFF2314177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2392ad2d158ddfbabda3b5c71e733a22c84edea6f795a49aac4476b0098cf21. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZWFF2314178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6190060455282c83c8a4fe2e869eb09ba8deab1e1c4f7a372e2540af430af68c. 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/QZWFF2314181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c80ec9eb72ef295bb9a78fe67432659fbc0cf3c52b2085de8644a16f6b8d324. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFF2314182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670fffbdca6332bf984c391fc5e4809dec35721de2a1d515f82a019a4966ad46. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:39:28Z), 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/QZWFF2314183.