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 0xaf32db56bdcbd23c018890876b9a294633a6ef405462ca0aa56d1762f91de26e. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0210522b-143c-4c7a-a94d-7c31fdd4359d.json and https://artists.proofprofile.net/proofs/artist/0210522b-143c-4c7a-a94d-7c31fdd4359d.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 0x32fd8ac73fb9b20102899ab5eababcbcf8e75f9ed387e611d36a8696192df7e9. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZNWQ2448480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b72f80ff3fbc1b768d0a2bf13ab110f0ffe799a6836350e8424f51b9c7f79c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZWFE2486771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2561bf7fbc0800395c982867e750aafc75ce7255201473c80ce369f0ec13c220. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFE2486772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435919894ce364a9cbe68c9627fce6e371b6937c81caca42a152d8072ac4b0fc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZAKB2509112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbe1d48121aadebef5516778cc1e84722fd7e210f3cff0dd55c6f48907f152a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:58Z), 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/CBG6P2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34dac2b5f8dc5f692ff114a397d562ac17c5bc92b3ae745f137db912df3c3a4. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/CBG6P2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d0057184d7f8fabf359eb33c38f16a785f332dd13dd79f76f7881cf211ec40. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CBG6P2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435919894ce364a9cbe68c9627fce6e371b6937c81caca42a152d8072ac4b0fc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZAKB2509112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f86a74993d973ae4db2fa593d0e007c13fe78208b6f411830c7cb6c9098f35. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CBG6P2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec06c72f6197a5845575ef6ebdd3aa8fe01e637cb727ca607322ee7fed8d703. 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/CBG6P2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d68da4ee53d6573d0d446f359ec4020d35cfacc8fb7fa203034d3b80f1cb22f. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/CBG6P2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72b8617581ae1c92f724d626067f9e80ac8c8f28c91fbb79647c0ba1bf60aa7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CBG6P2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d888200de6356ce24148a02c5855f450cac8ec23fde445682260db6d31a6e5e. 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/CBG6P2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cc654c39ba287647e5ec5cf5056b09418420f661fe05efe9ff2e633c544f7b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CBG6P2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b646b14d64bcf340359ca9461e927c24e1ea537695ccbaeed7900f47d8a41b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CBG6P2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dbadd6bb20460cdd34fdf58b967411218a62bb0270a12cf3fc00b0a2cb2403. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:18:55Z), 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/CBG6P2500012.